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Purveyors of Electronic, Musical and Vintage goods from then, now and in between. 
Since 1982.

VINTAGE STEREO RECEIVERS
SERVICED / RESTORED CLASSICS 


Vintage Stereo Receivers & Used Stereo Receivers that have been Refurbished. Brands / models of Classic / Vintage Stereo Receivers, 'Old-School' / 2-Channel stereo receivers, and Quadraphonic / Quad AM/FM receivers such as Kenwood KR, MCS, Pioneer SX / Pioneer SX-1980 for sale, Sansui G, Sony STR, Yamaha CR and Stereo / home audio receivers from the 1960's, 1970's & 1980's.


 


 


CLASSIC 2-CHANNEL STEREO RECEIVERS . . .
 

      

    

NEW ADDITION 10/27/17
(Click on above thumbnails to enlarge photos)
CheckMarkSmall_web.jpg (792 bytes) warranty
RESTORED / REFURBISHED / FULLY SERVICED
HUGE & VINTAGE STEREO RECEIVER
KENWOOD KR-NINE-G
'SILVER FACE'
#...0063
circa 1978

"WORLD AC POWER"
MIJ!
SOLD 11/30/17
SHIPPING TO KENTUCKY


ü  Our technician has completely gone through and 'Certified' this unit.

ü  We have completely gone through this unit cleaning everything including all switches, controls and contacts. Extensive cleaning of unit internally.

ü  Controls were 'flooded' w/ 'De-OxId' and are quiet (very difficult to do as 'tone' section must be painstakingly removed).

ü  Switches such as the 'Function' selector and the 'Tone Bypass' switch were also flooded with cleaner.

ü  We also aligned the tuner front-end on both AM & FM bands for optimum performance as older tuner components will have 'drifted' over the years.

ü  AM 'Stick' ferrite core adjusted for optimum reception and minimal noise

ü  AM 'Stick' antenna 'ball and socket' inspected and is holding well.

ü  Tuner string checked for any fraying then re-tensioned to increase traction & relieve flywheel binding and re-centered pointer to correct dial position.

ü  We replaced 18 light bulbs, including ALL dial & meter lamps, the dial pointer lamp, the 'Speakers' bulb, 'FM', 'AUX', 'PHONO 1', 'NR MODE' and the timer lamp with new units for trouble-free service. 

ü  Both power supply filter capacitors removed and independently tested.

ü  All inputs tested, including both Phono inputs

 
ü  Both amplifiers produce clean and even sine waves into 'brick-wall' 8 & 4 ohm loads! No power supply hum of any kind. It's dead silent!

ü  All functions test fine, (with the exception of the timer which still worked (works) fine, but we have 'set default to 'Power-ON' and 'pre-loosened' connector linkage sleeve as it will likely break in the future (almost 100% of the time) from a user applying too much torque at some point. We avoid this likely future issue by disconnecting the linkage on all the Kenwoods that have a timer (can be reconnected if user wishes)).

Following restoration procedures, the unit was ran continuously at medium volume, as all our amplifier / receivers are, into a 4 Ohm load with "Loudness" on and Tone Controls at 10 for 48 hours. Total restoration time investment ~14 hours. You will not be disappointed.


VERY GOOD TUNER! Generally AM reception in a stereo receiver is treated as an 'after thought', but the AM reception on this one is WAY above average. Pulls in stations like an old 'Tube' radio! FM reception also incredible and IMPECCABLY CLEAN!!!

   
 From the original Kenwood KR-9000G / Kenwood Nine G' service manual,
"80 Watts per channel minimum RMS, both channels driven, at 8 Ohms from 20-20,000 Hz with no more than 0.03% harmonic distortion"
- However -
   
ü  On our test bench, the internal amplifiers of this receiver #...0063, produced 29 Volts per channel @ 8 Ohms with 1KHz input for 105 Watts and 26 Volts per channel @ 4 Ohms with 1KHz input for 169 Watts via discrete, TO3, metal cased outputs. (2x 2SC1116 & 2x 2SA747)
 AC Idle current at .6A, & floor noise L=<2.4mVAC & R=<6.6mVAC.

  _____________________________
   
One of the 'Big Boys' Stereo Receivers from Kenwood! This is from massive 'G' series. Beautiful 'Brushed Silver', aluminum face with gorgeous, BLUE backlit analog, slide rule tuning dial and analog VU meters.
This unit has a very high 'KPD-Factor' as well as 'MPD' and 'LPD' factors as well. Features gorgeous, BLUE / AQUA back-lit slide rule analog tuning scale with matching VU meters as well. VERY elegant and IMPRESSIVE unit when lit in a darkened room. This unit was marketed under two model numbers. The Kenwood 'KR-Nine G' and the 'KR-9000G'
(one model number for North America and the other for the rest of the planet).
All original milled, aluminum Kenwood knobs intact. Original, REAL walnut wood veneer case in spectacular condition with only minor, typical wear. No breaks or repairs to the wooden cooling louvers. Slight / Light scuffing on tuner window, but nothing too distracting. Entire unit is a thing of beauty.

Kenwood Nine-G Features are:
   
-
Weighted flywheel analog AM/FM slide-rule tuning with lighted dial pointer
- Separate Bass, Mid & Treble EQ with super quality de-tented controls
- Super quality, De-tented Volume control
- Tone Defeat selector for 'purest' signal path if desired
- Triple Pair Speaker Selector; A, B, or C or A+B or A+ C or Off speaker selector (two pair at a time)
- Built-in 'Pre-Out / Power-Input' loop
 - Built-in Subsonic Filter to eliminate excess rumble from sources such as turntables
- Hi filter for reducing tape hiss / electronic hiss & noise and record static
- Loudness to accentuate bass response at lower volumes
- Dual Analog VU meters for Power Output w/ dual range selector
- Dual Analog
'd'Arsonval' meters for tuning and signal strength
- Stereo / Mono selector (for entire pre-amp section, not just FM tuner)
- FM Muting to eliminate 'hiss' between stations.
- Rear mounted FM 'De-Emphasis' selector for either 50μsec or 75μsec
- Stereo indicators
 - Aux inputs (may also be used for Video / CD / DVD /DAT / VCR / MP3 / iPod® / iPad® / iPhone® / iTouch® / iGadget / MP3 / XM® / SIRUS®  etc.)
- Dual tape monitors with bi-directional dubbing (Tape Monitors can be used with Video / CD / DVD / VCR / DAT / MP3 / iPod® / iPad® / iPhone® / iTouch® / iGadget / MP3 / XM® / SIRUS® CDR (CD recorders as well as for inserting signal processors, such as EQ's, Reverbs, Spatial Enhancers / Dynamic Processors, Noise Reduction units, Special Effects units, Time Delays, etc)
- Dual Phono / Turntable inputs w/ built-in Phone Pre-Amp
- Built-In AM 'Stick' Antenna
- 1/4" front mounted, Microphone input jack w/ 'Mixing' pot to inject your voice or other instrument signal into current program (BE CAREFUL WITH YOUR SPEAKERS DOING THIS!!!)
- 400Hz 'Record Calibration' tone generator built-in
- Dual 1/4" Stereo Headphone Jacks
 - Built-in Dolby NR / FM decoder and it works well (brightens highs even on non-Dolby FM broadcasts)
- 120 Minute 'Sleep Timer' (we ship these receivers with the function 'disconnected' to eliminate future issues)
 - TripleAC convenience outlets; 2 'Switched' and 1 'Un-Switched for a total rated capacity of 400 Watts

- True "
WORLD AC POWER" 50 / 60 cycles and 110V, 120V, 220V & 240V AC current

Kenwood Nine-G Original Specs:
  
POWER / PRE AMP SPECIFICATIONS:
Power output: 110Wpc @ 4 Ohms
80Wpc @ 8 Ohms
280 Watts 'dynamic power' @ 4 Ohms
THD;
0.03% @ full rated power & 8 Ohms 0.01% @ 1/2 power
IHF IMD; 0.03% @ full rated power & 8 Ohms
Freq Response of power amp section; 5-100,000kHz
IHF IMD;
0.03% @ full rated power & 8 Ohms 0.01% @ 1/2 power
Potential power bandwidth power amp section;   5-100,000kHz
Damping factor; 40 @ 8Ω / 1kHz
Signal / Noise;  115dB !!! @ AUX / Tape 'shorted'
Input Sensitivity AUX / Tape; 120mV @ 50kΩ
Bass Control;  ±12dB @ 50Hz
Mid Control;  ±12dB @ 800Hz
Treble Control;  ±12dB @ 15kHz
Low Filter; -15dB @ 18Hz
High Filter; -6dB @ 10kHz
Loudness Control; +10dB @ 100Hz (-30dB VOL)
Output levels / impedance; Tape RCA 150mV / 100 Ohms
DIN 30mV / 80kOhms
Pre-Out 10V? / 1k
 
TUNER SPECS FOR FM;
Tuning Range;
88-108MHz
Freq Response; 30-15kHz
S/N @ 65dBf; >80db Mono or 74dB Stereo
Capture Ratio @ 65dBf; 1.0 dB
THD Mono @ 1kHz; 0.1%
THD Stereo @ 1kHz; 0.15%
FM Alternate Channel Selectivity; 75 dB
Spurious Noise Ratio; 85 dB
IF Rejection; 75 dB
AM Suppression; 65 dB
Stereo Separation; 45 dB @ 1k & 35dB @ 50-15kHz
Subcarrier Product Suppression; 46 dB

TUNER SPECS FOR AM;
Tuning Range; AM Band 540 kHz-1600 kHz
S/N; 
>50db
Useable Sensitivity (IHF Bar Antenna); 20μV
Selectivity; 30dB @ 1kHz
IF rejection; 55dB @ 1kHz
THD; 0.5% @ 80dB / m
 
PHONO SECTION SPECS;
Freq Response;
30Hz-20kHz w/ RIAA deviation; ±0.3dB
S/N; >80dB, IHF-A curve
Input Sensitivity; 2.5mV @ 50kΩ
Overload limit; 230mV @ 1k w/ 0.03% THD

 
Again, we have completely gone thru this unit and it's 'Ready To Go'! This is a HUGE,  'Monster' receiver from 1978! The unit looks fabulous, works and sounds great! Includes a pdf, e-copy download of the Kenwood KR-9000-G / NINE-G service manual. Receiver measures 24.5" wide x 18.25" deep x 8.5" high and weighs 44 lbs unpacked. Includes our standard 90 day limited warranty.
KENWOOD NINE-G STEREO RECEIVER
Cond. 8.5

$1099.
SOLD 11/30/17
SHIPPING TO KENTUCKY

(Above text property of www.oaktreevintage.com / Oak Tree Enterprises, LLC. See 'Copyright Information' page for details)

 

 

    

        NEW LISTING 9/21/16

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RESTORED / REFURBISHED / FULLY SERVICED
VINTAGE
PIONEER STEREO RECEIVER
PIONEER SX-1500T STEREO RECEIVER 
#...6766
CIRCA 1968-70

MIJ!

for sale

We have completely gone through this cleaning inside and out including all contacts, switches and controls. All indicator lamps and dial / meter lamps replaced with new units, for trouble-free service. We also aligned the tuner for optimum performance on both AM and FM. All functions tested for perfect operation. All inputs tested and both sides produce clean and even sine waves! No power supply hum of any kind. It's dead silent! All functions tested for perfect operation.

Very impressive early Pioneer unit from their 1st series of "Solid State" Stereo Receivers. This was one of the most likely Pioneer receiver to come back with Vietnam GI's. First one of these we've had in 19 years to make it 'all the way through' our refurb / restoration, and was a 'good enough' likely candidate to begin with. Loaded with very useable features and looks great! The tuner on this one is VERY strong on both AM an FM, with AM reception that we would describe as 'AMAZING' (yes, I know, most folks couldn't give a hoot about AM, but a few of us here, including me do, and were very impressed by it's AM performance).

ü  On our test bench, the internal amplifiers of this Pioneer SX-1500T receiver #...6766 produced 19.5+ Volts per channel @ 8 Ohms with 1KHz input for 47+ Watts and 15+ Volts per channel @ 4 Ohms with 1KHz input for 57+ Watts via discrete, TO3, metal cased output devices (4x Toshiba 2SC793 output transistors).
 AC Idle current at .2A. DC offset output <11mVDC either channel. Floor noise tested a 1.0mVAC.

   ____________________________

Pioneer SX-1500T Features include:

- Weighted flywheel analog slide rule tuning
- Separate L/R- Front/Rear Bass and Treble Controls
- Built-in Hi and Sub filters for reducing 19kHz pilot tone and 38kHz Harmonic in FM broadcasts, Tape Hiss and the Sub filter for reducing turntable rumble 
 - FM muting, separate from FM stereo selector
- Selectable FM Modes for Stereo or Mono
- AFC (Automatic Frequency Control) for improved FM reception
- Stereo Mode selector for entire Pre-Amp section selects; Mono, Right channel or Left channel input only & for Standard Stereo
- Analog lit, '
d'Arsonval' meters for tuning/ signal strength
-  AUX Input (may also be used for Video / CD / DVD / VCR / iPod / DAT / MP3 / XM / SIRIUS etc.)

- Tape Monitor (Tape Monitors can be used with Video / CD / DVD / VCR / DAT / iPod / MP3 / XM / SIRIUS CDR (CD recorders as well as for inserting signal processors, such as EQ's, Reverbs, Spatial Enhancers / Dynamic Processors, Noise Reduction units, Special Effects units, Time Delays, etc) Dubbing can be used with CDR (CD recorders) units)
- Additional Direct Tape Head input (for older Reel Decks that did not have a built-in pre-amp)
- Selectable Tape Speed EQ input for either 7.5 ips or 3.75 ips. (used for older Reel Decks that did not have speed compensating EQ or Pre-Amps built-in)
- Dual Phono inputs with input 1 being selectable for either standard magnetic or can also be used with older Ceramic cartridge turntables. Input 2 is strictly for modern / standard magnetic cartridges
- Built-in AM ferrite antenna
- Speaker On / Off selector
- Rear mounted, Separation control for fine tuning FM MPX
- 2 convenience AC outlets with 1 being switched
- True “
WORLD AC POWER"
as it will work on both 50 or 60 Hz AC and voltages from 110-240 Volts AC.

Original Pioneer SX-1500T Specs:
  
"The Pioneer SX-1500T has a RMS power output of 55 Watts per channel min. @ 8 Ohms from 20 hertz to 70,000 hertz with no more than 0.500% THD (measured utilizing AUX input), with a "Music Power Output" of 140Wpc @ 8 Ohms and 170Wpc @ 4 Ohms"
 
POWER / PRE AMP SPECIFICATIONS:

THD:
0.500% @ full rated power
Freq Response of power amp section: @ full rated power 20-70kHz
Power Bandwidth w/ all channels driven: 15-70,000Hz ±0dB
Damping factor:
25 @ 8Ω / 1kHz
Input Sensitivity / Impedance for AUX: 100mV / 100k Ohms @ 1kHz
Input Sensitivity / Impedance for Tape Monitor: 200mV / 100k Ohms @ 1kHz
Input Sensitivity / Impedance for Tape 'HEAD': 1.5mV / 120k Ohms @ 1kHz

TUNER SPECS FOR FM:
Freq Response:
30-15kHz (limited by FCC regulations)
FM TUNING RANGE: 87-108MHz
S/N: 
>65db Stereo
Useable Mono RF Sensitivity:
1.7 μV
Capture Ratio:
1dB
Image Rejection: 76dB @ 98MHz
Stereo Channel Separation @ 1kHz: 
37dB

TUNER SPECS FOR AM:
AM TUNING RANGE: 525-1605kHz
IHF Sensitivity:
20 μV
Image Rejection: 60dB @ 1MHz

PHONO SECTION SPECS:
Freq Response:
20-20kHz
S/N:
80 dB
Input Sensitivity 'MAGNETIC':
2.4 mV @ 50kΩ & @ 1kHz
Input Sensitivity 'CERAMIC':
51mV @ 90kΩ & @ 1kHz


Again, receiver has had complete service as stated earlier, and all functions tested. One note about this unit, as well as some of the 'Vietnam' era units is that the RCA I/O's on the rear panel are located fairly close together, and you'll need to utilize fairly 'normal' jacketed RCA connectors / plugs, and not some of the 'modern / FAT' jacketed versions as there's not enough clearance for them. Unit looks near NEW and sounds great. Face and all original knobs intact and look great as does the wood grain, case! Includes a pdf, 'e' copy, download of the Pioneer SX-1500T owners / users / instruction manual. Also comes with a pair of those, "worth their weight in gold" Pioneer speaker plugs. Measures 16.5" wide x 13.75" deep x 5.5" tall and weighs 25 lbs unpacked. Comes with our standard 90 day limited warranty.
PIONEER SX-1500T
Cond. 8.5+

$549.
(C) R.R.

(Above text property of www.oaktreevintage.com / Oak Tree Enterprises, LLC. See 'Copyright Information' page for details)
 

 

 
 
 

 

Did you know?
While the company 'Pioneer' was officially established in 1961, the founder was actually developing speakers as early as 1937. In 1962 Pioneer marketed the worlds first 'separate component' stereo system for the home, and in 1975, the worlds first 'component system' for the car. In 1984 they introduced the first CD player for the automotive use (and I was selling it then). Pioneer had many other 'firsts' and continue to be a major 'player' in consumer, professional and industrial electronics.

 

 


 

 

 

 




So, why do the older / 'vintage' receivers and amplifiers sound so much better (for music) than the much more modern and fancier, 'surround sound - '5.1', '7.1', '9 3/4.1' or '8.BR549' A/V receivers? (Part 2)

Cont from Part 1 of; “So, why do the older / 'vintage' receivers and amplifiers sound so much better (for music) than the much more modern and fancier, 'surround sound - 5.1', '7.1',
'9 3/4.1' or '8.BR549' A/V receivers?” (excerpts ‘paraphrased’ from …
So, just as importantly as the ‘technical aspects’ mentioned in “Part 1”, it’s ALL ABOUT THE MONEY, and we consumers want things as ‘cheaply as possible’, right…? Yes, we do, otherwise the market place wouldn’t be flooded with ‘cheeeeeeeeeeeeeeeeeeese’ from China (and from any of the other sources that can ‘make it as cheaply as possible). You say, “hold on a just gohl-darn minuite”, it’s the manufacturers fault, they’re the ones making things so ‘CHEAP’. NO, it’s not their fault. They are simply following consumer demands (who vote with their dollars, by continually spending as little as possible over the past generation++) and have no choice (at least in ‘mainstream goods’) but to produce and supply goods for as little ‘end user cost’ as possible,…”The Race to the Bottom”. Sure, we consumers give ‘lip service’ to terms like “high quality” and “good service”, but in the end, as a whole, we go for the cheapest options (one of the reasons service companies ‘outsource’ customer service to India, is that they can’t afford to pay ‘domestic labor rates’. Why not? Because we consumers want our phone / cable / insurance or whatever as ‘cheaply as possible, and we aren’t willing to pay for any better). Hey, I’ve been guilty of it a few times myself, but have learned the hard way (fortunately fairly early on)  to try and avoid that method of acquiring items and / or choosing service providers.
So, historically stereo manufacturers had to be concerned, primarily with ‘paying themselves’ in the end, when they designed / built / produced something. When mfgs start out to design an item for market, they are usually ‘backing into it’ from a projected retail / end user price point (that was not necessarily as applicable ‘back in the day’, which is how we ended up with ‘monster receivers’ such as the Marantz 2500 & 2600, Pioneer SX-1980, Sansui G-22,000 and G-33,000, Yamaha CR-3020 and a couple of others that escape me). There are many costs associated with bringing an item / model to market and getting it to the point where it can actually be purchased by an end user / consumer. These costs are similar no matter what the item, ie; stereo gear, clothes, tools, food, services, raw materials, or any item or ‘widget’. Some ‘added cost’ items have generally remained a constant as a percentage of the overall final price of an item, over the years, such as ‘raw materials’, payroll, capitol investments, packaging, transportation / shipping etc. However, in recent years, especially where ‘stereo receivers’ are concerned, manufacturers have been adding more and more features. Most of these “features” have little to do with improving the ‘REAL’ sound quality of the unit, and more to do with compatibility with extraneous aspects. We play DVD’s thru them that are encoded with ‘Dolby’, ‘THX’, ‘dbx’, 'DVD', ‘Lucas Sound’, ‘Blu-Ray’, etc. and inputs that mention things like “iPhone”, “Android”, “iPod”, “Apple”, etc. All of those things are ‘licensed’ from their respective trademark owners. Not to mention all of those manufacturers are constantly making changes (they tend to like to call them ‘upgrades’) to their products, which means that any mfg utilizing or including that ‘3rd party’ product as a feature in their product must now employ their engineers to modify their designs to ‘play well with others’. Those licenses cost money, and those costs take away from money that could be available to invest in the ‘sonic quality’ of the stereo unit.
Sonic quality is a sum of many parts, but a few are ‘discrete’ output transistors, instead of ‘chip’ outputs. ‘Metal-Cased / TO-3’ output transistors, instead of simply ‘epoxy-cased’ transistors. Larger power transformers, and larger storage capacitors to both make sure you have the available current to do the output transformers justice, and the ‘storage capacity’ to make sure you have enough power in reserve to produce deep, rich bass notes. Other aspects that add overall quality to a unit are the caliber of the switches, controls, contacts, semiconductors and components, shielding around sensitive circuits, internal wiring quality and connector / connections quality etc. Is the unit designed with ‘full size’ potentiometers, secured to the chassis with metal ‘shaft nuts’, or is it designed utilizing very ‘small body’ (read, “anemic”) potentiometers, with their control shafts simply protruding thru a hole in the front and secured only by their solder joints (which means that every time you touch / manipulate a control, you are ‘flexing / stressing’ the solder joints and circuit board). The same goes for the I/O jacks on the back panel. Throughout the unit, most
modern (most of what has been built in the past 25-30 or so years) electronics are built utilizing ‘SMD’ technology (look it up). While ‘SMD’ tech facilitates automated assembly processes (read, “robots”), keeps weight down (means lower handling and shipping costs), utilizes smaller individual components (again, ‘cheaper’ parts), SMD doesn’t generally lend to the improvement of ‘sonic qualities’. In-fact, it is probably THE BIGGEST CONTRIBUTOR to degraded, ‘analog’ audio quality. It’s great for things like calculators, computers, smart phones, appliances, automotive control devices etc (unless any of those units are expected to sound good). However, better ‘audio quality’ requires ‘better current’ (Amperes / Amps). Better current is generally best handled by traditional, ‘full size’ electronic components (the stuff designed, starting from about the 1920 thru the 1960’s, and generally peaking in designs released about 1977-79...at least as far as consumer hi-fi goes). Components such as ‘real transistors’ (or tubes if you’re so inclined), full size, electrolytic capacitors (bigger is generally better for storage, and that’s one of the main jobs of capacitors), ‘full size’ resistors to handle all that current without ‘melting down’ or going ‘up in smoke’, etc. The main reason that modern gear is able to attempt to accomplish the same tasks (and more) than vintage gear is that they convert the signal from analog to digital on the front end, and only at the ‘last minute’ convert it back to analog at the back end. That comes back to the generation plus old arguments of analog vs digital.
And the beat goes on…


 

 

Say It With Silver This Holiday Season....


 

.... And Really "Rock Around The Christmas Tree"!

 

    


       NEW ADDITION 2/1/17
   (Click on above thumbnails to enlarge photos)
CheckMarkSmall_web.jpg (792 bytes) warranty
RESTORED / REFURBISHED / FULLY SERVICED
VINTAGE
YAMAHA STEREO RECEIVER
YAMAHA R-8 / R8
BIG POWER
WITH WIRELESS REMOTE CONTROL

 Circa '81-'83
MIJ!

  for sale

  
We have completely gone through this unit cleaning everything including all switches, controls and contacts. We also aligned the tuner front-end for optimum AM & FM performance as older internal tuner components have always drifted on vintage gear over the years. Power indicator lamps replaced. New / Fresh tuner memory capacitor installed so that station memories function properly. Loudness control re-aligned for proper function. Entire display / readout works perfectly. All inputs and functions tested, and both amplifiers produces clean and even sine waves into static 8 & 4 ohm loads! No power supply hum of any kind. It's dead silent! All functions test fine. Following restoration procedures, the unit was ran continuously at medium volume, as all our amplifier / receivers are, into a 4 Ohm load with "Loudness" on and both Tone Controls at 10 for 72 hours.
  ____________________________
 
Great Yamaha R-8 receiver BIG power, Yamaha's "Natural Sound" with the convenience of a digital tuner. Very nice looking unit. The Yamaha R-8 was an upper level receiver with specs to prove it.
Yamaha R-8 Features include:
 
- Yamaha's "Natural Sound Stereo Receiver"
- Low Impedance Drive capabilities
- High Dynamic Power Output capability
- Digital tuning w/ Fine Tuning' feature
- 16 Random AM & FM tuner presets
- A, B and A+B speaker selector
- Separate Bass, Mid and Treble with high quality de-tented controls
- Record Out selector. (Separate "Record Out" allows recording from one source while you listen to another. ALSO, it is the way you can utilize external EQ's, and Signal Processors with many Yamaha Receivers, as their 'Tape' buttons typically 'cancel' out the 'Input / Source' selected)
- Dual tape deck monitors (Tape Monitors can be used with Video / CD / DVD / VCR / DAT / iPod / MP3 / XM / SIRUS CDR (CD recorders as well as for inserting signal processors, such as EQ's, Reverbs, Spatial Enhancers / Dynamic Processors, Noise Reduction units, Special Effects units, Time Delays, etc)
- Dual A/V Inputs (A/V inputs can be used with Video / CD / DVD / VCR / DAT / iPod / MP3 / XM / SIRUS CDR (CD recorders as well as for inserting signal processors, such as EQ's, Reverbs, Spatial Enhancers / Dynamic Processors, Noise Reduction units, Special Effects units, Time Delays, etc)
- Accessory Loop / I/O used for inserting signal processors, such as EQ's, Reverbs, Spatial Enhancers / Dynamic Processors, Noise Reduction units, Special Effects units, Time Delays, etc. (the alternative to a 'true tape monitor')
- Phono / Turntable input with selector for either MM (Moving Magnet cartridge) or MC (Moving Coil Cartridge) (this feature alone could be worth hundreds of $$ if you are going to utilize a Moving Coil cart) (see specs below)
- CD Input (may also be used for Video / CD / DVD / VCR / DAT / MP3 / XM / SIRUS etc.)
- Yamaha's exclusive Variable "Loudness" control
- Auto DX / Local mode
- Auto / Stereo / Manual / Mono FM tuner modes
- "DNC" (Dynamic Noise Canceller) for externally input devices, such as Tape Decks / VCR's etc.
- Simulated Stereo (for simulating stereo on 'Mono' inputs such as older Video units
- Digital indicators for Station frequency, DX / Local mode, Stereo and Station Lock as well as an LED signal strength meter
- Wireless Remote Control Capable (Yamaha RS-9 Remote Control is included with this unit)
- Dual AC convenience outlets located on the rear panel (1 switched @ 100 Watts and 1 un-switched @ 200 Watts for a total capacity of 300 Watts) 

  
 
-Original Specs:
"The Yamaha R-8 has a continuous / RMS power output of 85 Watts per channel min. @ 8 Ohms from 20 hertz to 20,000 hertz with no more than 0.015% THD (measured utilizing AUX input)"
 
POWER / PRE AMP SPECIFICATIONS:
Continuous Output Power per Channel; 85 Watts @ 8Ω & 0.015% THD w/ 20-20kHz input
100 Watts
@ 6
Ω & 0.03% THD w/ 20-20kHz input

Freq Response / Bandwidth of power amp section; @ 42.5 Watts
/ 8-Ω  10-50kHz
Damping factor; 60 @ 8
-Ω w/ 1kHz input
Signal / Noise ratio;  103dB @ CD / Tape (inputs shorted)
92dB @ Phono MM
w/ 5mV (inputs shorted)
75dB @ Phono MC w/ 500μV (inputs shorted)
Input Sensitivity AUX / Tape; 150mV / 47k
-Ω
Tape Output level;
 150mv / 470
-Ω
Channel Separation CD/Tape/Video; 60dB (inputs shorted)
Channel Separation Phono; 60dB (inputs shorted)
Bass Control Characteristics; ±10dB @ 50Hz w/ Turnover @ 350Hz
Mid Control Characteristics; ±12dB @ 1kHz w/ Turnover @ 1kHz
Treble Control Characteristics; ±10dB @ 20
kHz w/ Turnover @ 3.50kHz
Continuous "Loudness" Contour; Level-Related Equalization Attenuation to -40dB
Headphone Output / Impedance @ 0.015% THD; 0.75V /
270-Ω
 

TUNER SPECS FOR FM;
Tuning Range;
87.5 to 108.0MHz
Freq Response;
30-13kHz ±0.5 dB (limited by FCC regs)
S/N; > 81db Stereo
S/N; > 85db Mono
50 dB Quieting Sensitivity:
Mono (DX) 1.5μV (14.8 dBf)
Stereo (DX) 20μV (37.3 dBf)
Useable Mono Sensitivity (98 MHz, 30 dB Quieting); 0.75μV (75 Ohms) 8.8dBf
Capture Ratio; 2.5dB DX, 1.2dB Loc
FM Alternate Channel Selectivity; 85dB
Spurious Response Ratio; 70dB
Image Response Ratio; 40dB
IF Response Ratio; 90dB
AM Suppression Ratio; 55dB
FM separation;  50dB @ 1kHz
 
TUNER SPECS FOR AM;
Tuning Range;
510 to 1620kHz
S/N; >50db
Useable Sensitivity; 250μV / m with loop antenna
S/N; > 50dB
Selectivity; 24dB
THD; 0.3% @ 400Hz
Spurious Response Ratio; 50dB
Image Response Ratio; 40dB
 
PHONO SECTION SPECS;
Freq Response MM;
20-20kHz
Freq Response MC; 30-20kHz

S/N;
92dB with MM cart and 5mV input
Input Sensitivity / Impedance w/ MM Cart;
160μV / 220-Ω
Input Sensitivity / Impedance w/ MC Cart; 2.5mV / 47k-Ω

RIAA Deviation MM; 20-20kHz with MM cart.±0.3dB
RIAA Deviation MC;
30-20kHz with MM cart.±0.5dB
Overload limit for 0.01% THD @ MM; 110 mV
Overload limit for 0.01% THD @ MC; 8 mV

 

  Again, we have completely gone through this unit as described above. All functions test fine. 
 This receiver looks NEW, works and sounds great!

Includes original Box and packing, and the original Yamaha RS-9 Remote Control.
Comes with an 'e-copy', pdf download of the original Yamaha R-8 owners manual.
Unit measures 17.2" wide x 5.9" tall x 16.6" deep and weighs 25 lbs unpacked. Includes our standard 90 day limited warranty.
YAMAHA R-8

Cond. 9+

$529. w/ Wireless Remote Control
(C) R.R.

(Above text property of www.oaktreevintage.com / Oak Tree Enterprises, LLC. See 'Copyright Information' page for details)
 

 

 

 


 







Did you know?
A SUPER LOW DISTORTION RATING COULD LIKELY BE A BAD THING!...
THD
(Total Harmonic Distortion) – THD is a measure of the how much a given audio device may distort a signal through the inevitable introduction of added harmonics or overtones. These figures are usually given as percentages. THD figures below approximately 1% are inaudible to most people (although market promotion efficiencies have 'brain-washed' much of the 'audio-public' into weighting low THD with almost 'holy grail' importance. I remember some manufacturers touting numbers as low as <0.003% in the early Eighties).  Low THD is not always an indication of a high quality amplifier. In fact, it is / was more commonly just the opposite. Some of the 'highest end' (read REALLY expensive) and certainly best sounding units will have distortions somewhere between .1% & 1%.
Low THD is only a simple 'bi-product' of 2 aspects. The first was an inordinate and increasing amount of 'global / negative feedback' built into amplifiers primarily to suppress distortion. This practice started to occur in the late 1970's and certainly was in 'full force' past the early 1980's for most 'main stream' consumer-grade audio amplifiers. Unfortunately this also 'suppressed' tone and 'punch' (musicality) but it made the numbers look good to the 'spoon fed' consumer (kind of like overly high speaker wattage numbers, and sorry if you're in that group and, most folks were so you're not alone). Secondly manufacturers were moving away from 'discrete-transistor' output designs to more 'monolithic' 'power-pack' output designs. While these designs reduced power supply requirements, thus reducing parts costs and weight (also translates to lower prices due to savings on freight from Asia) they generally sounded anywhere from somewhat 'anemic' compared with the designs from a few years previous, to completely 'gutless' and 'un-musical'. But, hey,… they had very low distortion figures….Can anyone say 'threw the baby out with the bath water'?

Excerpts of the above text from the website of one of the best Car Audio sites and stores in the world, 'Car-Fi' www.car-fi.com .

  

 

    

NEW ADDITION 12/18/17
(Click on above thumbnails to enlarge photos)
CheckMarkSmall_web.jpg (792 bytes) warranty
RESTORED / REFURBISHED / FULLY SERVICED
VINTAGE STEREO RECEIVER
VINTAGE SHERWOOD STEREO RECEIVER
SHERWOOD S-8300-CP

AM/FM STEREO RECEIVER
#...
8700
Circa 1980-81
for sale

ü  Our technician has completely gone through and 'Certified' this unit. Everything was cleaned inside and out including all switches, controls and contacts.

ü
Internal fuses checked for correct value / function and replaced where necessary.  

ü Controls tightened to chassis.

ü
All dial / meter LED illumination lamps functioning.

ü
We also aligned the tuner front-end, FM MPX and dial alignment on both AM & FM bands for optimum performance as older tuner components will have 'drifted' over the years.  INCREDIBLE TUNER! AM reception WAY above average, FM reception incredible, PUNCHY and MUSICAL and IMPECCABLY CLEAN!!!

ü
Following above procedures, all functions tested for perfect operation and unit was cosmetically detailed inside and out.  

ü
All inputs tested and both sides produce clean and even sine waves into static 8 & 4 ohm loads! No power supply hum of any kind. It's dead silent! All functions tested for perfect operation.  

ü Following restoration procedures, the unit was ran continuously at medium volume, as all our amplifier / receivers are, into a 4 Ohm load with "Loudness" on and both Tone Controls at 10 for 12 hours.
  
On our test bench, each internal amplifier of this particular unit, #...8700, produced peak power of 20.1 Volts per channel for 50 Watts per channel @ 8 ohm and 16.1 Volts @ 4 ohm for 64+ Watts per channel via discrete output devices at 1kHz. AC Idle current at .35A, & floor noise -60dBm.
____________________________
  

Beautiful condition, 1980 silver face receiver from Sherwood. Great performance for a 'mid-sized', 2-Channel audio system. This is an INCREDIBLEY ‘Musical’ sounding receiver. The tone / pre-amp section very transparent and ‘glassy’ sounding, even with only the FM tuner as a source! Fairly 'Punchy bottom-end (check the 'damping factor' in the specs).
 
Sherwood S-8300CP Features:
  
- Weighted flywheel analog slide rule tuning
- A, B, A&B speaker selector
- Separate Bass and Treble controls utilizing high quality de-tented pots as does the 'Volume' control
- "Loudness" function to boost Bass and Treble in relationship to Mid frequencies at lower volume levels for a much fuller sound.
- FM Muting / Stereo / Mono selector

- Hi filter for reducing tape hiss / electronic hiss & noise and record static

- 5-Segment LED, 'combo' meter for signal strength
- LED 'Tuning' center meter
- Phono / Turntable input with Built-In Phono Pre-Amp
- 'True' Tape Monitor with a DIN input as well as the standard RCA I/O's
(Tape Monitors can be used with Tape decks such as Cassette Tape Recorders/ Players, Reel to Reel's, 8-Track Tape Cartridge Decks, Video / CD / DVD / VCR / DAT / MP3 / iPod® / iPad® / iPhone® / iTouch® / iGadget / MP3 / XM® / SIRUS® CDR (CD recorders as well as for inserting signal processors, such as EQ's, Reverbs, Spatial Enhancers / Dynamic Processors, Noise Reduction units, Special Effects units, Time Delays, etc)
- Aux input (may also be used for Video / CD / DVD /DAT / VCR / MP3 / iPod® / iPhone® / iTouch® / iGadget / MP3 / XM® / SIRUS®  etc.)

- 1/4" front mounted, Microphone input jack (BE CAREFUL WITH YOUR 'HOME AUDIO GRADE' SPEAKERS DOING THIS!!!)

- Built-in AM ferrite antenna
- Externally located Speaker Protection fuses as well as the AC mains fuse
- Dual Convenience AC outlets. 1x Un-switched rated to 150 Watts and 1x 'Switched' at 100Watts

Sherwood S-8300CP Original Specs:
  
POWER / PRE AMP SPECIFICATIONS:
Power output @ 1kHz / Both Channels driven: 40Wpc @ 4 Ohms
50Wpc @ 8 Ohms

THD;
0.08% @ full rated power
IHF IMD; 0.01% @ full rated power & 8 Ohms
Damping factor; 55 @ 8Ω / 1kHz
Signal / Noise;  95dB @ AUX / Tape ('shorted')
Input Sensitivity AUX / Tape for 30W output @ 1kHz; 160mV
Bass Control;  ±10dB @ 100Hz
Treble Control;  ±10dB @ 10kHz
High Filter; 12dB / Oct @ 20kHz
Loudness Control; +10dB @ 100Hz (-30dB VOL)
Output levels / impedance; Tape RCA 150mV
 
TUNER SPECS FOR FM;
Tuning Range;
87.5-108MHz
50 dB Quieting Sensitivity:
Mono 4.5μV
Stereo 38μV
Useable Mono Sensitivity (98 MHz, 30 dB Quieting);

1.9μV
S/N @ 65dBf; >68db Mono or 65dB Stereo
Capture Ratio @ 65dBf; 1.5dB
THD Mono @ 1kHz; 0.12%
THD Stereo @ 1kHz; 0.15%
FM Alternate Channel Selectivity; 65dB
Stereo Separation; 50dB @ 1k

TUNER SPECS FOR AM;
Tuning Range; AM Band 525kHz-1650kHz
S/N; 
>45db @ 30% modulation
Useable Sensitivity @ -20dB; 200μV/m
Selectivity; 25dB @ 10kHz
 
PHONO SECTION SPECS;
Freq Response;
Standard RIAA curve, deviation; ±0.3dB
S/N; >85dB, IHF-A curve
Input Sensitivity for 30W output @ 1kHz; 2.5mV @ 50kΩ
Overload limit; 140mV @ 1k w/ 0.1% THD

Again, we have done the previously stated refurbishment / restoration work (~6 hours) on this unit to insure its performance, and it gets our full 'Certification'. All functions tested for perfect operation. This receiver has an awesome tuner.  All in all it's a VERY 'musical' and 'punchy' sounding receiver / amplifier. Looks NEAR NEW and sounds great! Includes a pdf, e-copy download of the Sherwood S-8300CP owners / users / instruction manual. Measures 18.5" wide x 5.25" tall x 13" deep and weighs an impressive 25lbs unpacked. Includes our standard 90 day limited warranty.
Cond. 9
SHERWOOD S-8300CP STEREO RECEIVER
$439.
(C) R.R.


(Above text, in it's entirety, property of www.oaktreevintage.com / Oak Tree Enterprises, LLC. See 'Copyright Information' page for details)

 

 

 

 

    

    

        NEW LISTING 11/2/17
(Click on above thumbnails to enlarge photos)
CheckMarkSmall_web.jpg (792 bytes) warranty
RESTORED / REFURBISHED / FULLY SERVICED
VINTAGE
YAMAHA RX-700U STEREO RECEIVER
small package, BIG POWER!
'DYNAMIC TOTAL POWER' = 300 Watts!
via DISCRETE OUTPUT DEVICES!

#...67VX
Circa '87-'89
MIJ


SOLD 5/14/18
SHIPPED TO LARRY IN CALIFORNIA

Our technician has completely gone through and 'Certified' this unit.
Everything was cleaned inside and out including all contacts, switches and controls. DC offset and bias PC mounted pots cleaned and current adjusted to within spec. Tuner 'memory capacitor' tested. Entire unit cleaned / detailed cosmetically inside and out. All inputs tested and both side produces clean and even sine waves into static 8 & 4 ohm loads! No power supply hum of any kind. It's dead silent! All functions test fine. Following restoration procedures, the unit was run continuously at medium volume, as all our amplifier / receivers are, into a 4 Ohm load with "Loudness" on and both Tone Controls at 10 for 48 hours and into a 4 Ohm Load!

   

ü  On our test bench, each internal amplifier of this particular unit, #...67VX, produced peak power of 28 Volts per channel for 98 Watts per channel at 8 Ohms and 24 Volts at 4 Ohms for 144 Watts per channel via discrete 2SA1265 & 2SC3183 output devices. AC idle current draw measured at 0.32A. Floor Noise Level tested at -60dBm.
____________________________

Great Yamaha RX-700U receiver. This was the replacement for the previous "R" series, that 'veered off the road' from Yamaha's standard by utilizing the cheaper 'STK' 'chip outputs' that most everyone else switched to as well to lower the price of electronics. It did lower the cost, but at the expense of 'sound quality'. This receiver got back on track by being designed around 'discrete output transistors' (check the power ratings). Full Audio features with the convenience of a wireless remote control.
YAMAHA RX-700U Features include:
  
- Digital tuning
- 16 Random AM & FM tuner presets

- A, B and A+B and 'Off' speaker selector
- Separate Bass and Treble
- Record Out selector with bi-directional tape dubbing controls.
(Separate "Record Out" allows recording from one source while you listen to another. ALSO, it is the way you can utilize external EQ's, and Signal Processors with many Yamaha Receivers, as their 'Tape' buttons typically 'cancel' out the 'Input / Source' selected)
- Dual tape deck monitors (Tape Monitors can be used with Video / CD / DVD / VCR / DAT / iPod / MP3 / XM / SIRUS CDR (CD recorders as well as for inserting signal processors, such as EQ's, Reverbs, Spatial Enhancers / Dynamic Processors, Noise Reduction units, Special Effects units, Time Delays, etc)
- VDP (Video Disc Player) input (can be used with Video / CD / DVD / VCR / DAT / iPod / MP3 / XM / SIRUS / TV or anything you need input to it)
- Phono / Turntable input with built-in phono pre-amp
- AUX Input (may also be used for Video / CD / DVD /DAT / VCR / MP3 / iPod® / iPad® / iPhone® / iTouch® / iGadget / MP3 / XM® / SIRUS®  etc.)
- Yamaha's exclusive Variable "Loudness" control
- Tone Bypass (bypasses tone controls / EQ for 'purest' signal path
- Stereo / Mono selector for entire 'Pre-Amp'
- FM muting / FM 'Stereo / Mono' function
- Digital indicators for Station frequency, DX / Local mode, Stereo and Station Lock as well as an LED signal strength meter
- Video Enhancer w/ Level Control
- Dual AC convenience outlets located on the rear panel (1 switched @ 100 Watts and 2 un-switched @ 200 Watts for a total capacity of 300 Watts)
- Remote control capable
- Compatible with other "RS" Yamaha gear for remote functions (meaning one remote control for all compatible gear)

   

YAMAHA RX-700U Original Specifications:

 
"The Yamaha RX-700U has a continuous / RMS power output of 65 Watts per channel min. @ 8 Ohms from 20 hertz to 20,000 hertz with no more than 0.009% THD (measured utilizing AUX input)"
  
POWER / PRE AMP SPECIFICATIONS:
Power Output; 65 Watts / 8Ω / 20-20kHz & 0.009%THD
75
Watts / 8Ω / 1kHz & 0.009%THD
75
Watts / 6Ω / 20-20kHz & 0.009%THD
Dynamic Power Output per channel; 101 Watts / 8Ω
118 Watts / 6Ω
150 Watts / 4Ω
Freq Response / Bandwidth of power amp section;
10-80kHz @ 32.5 Watts / 8-Ω w/ 0.1%THD
Dynamic Headroom; 1.8dB! @ 8-Ω
Damping factor; >50 @ 8-Ω full bandwidth
Signal / Noise ratio;  103dB @ AUX / Tape / Video
92dB @ Phono MM
Input Sensitivity AUX / Tape; 18.6mV
Tape Output level;
  150mV / 1.5kΩ
Channel Separation; >52dB @ AUX / TAPE / VIDEO w/ 'Shorted' inputs
 >55dB @ Phono w/ 'Shorted' inputs
Bass Control Characteristics;  ±10dB @ 50Hz (centered at 350Hz)
Treble Control Characteristics;  ±10dB @ 20kHz (
(centered at 3.5Hz)
'Subsonic' / Low Filter;  'Automatic' 12dB /Oct @ 10Hz
"Loudness" Contour; Maximum -40dB @ 1kHz
  
TUNER SPECS FOR FM;
 
Tuning Range;
87.5-107.9 MHz

Freq Response;
30-13kHz ±0.5 dB (limited by FCC)
S/N; > 76db Stereo
S/N; > 81db Mono
Distortion @ 1kHz; 0.07% Stereo, 0.07% Mono
50 dB Quieting Sensitivity:
Mono (DX) 1.55μV (15.1 dBf)
Stereo (DX) 21μV (37.7 dBf)
Useable Mono Sensitivity (98 MHz, 30 dB Quieting);
0.8μV / 9.3dBf
Capture Ratio; 1.5dB DX
FM Selectivity; 55dB
Spurious Response Ratio; 70dB
IF Response Ratio; 80dB
AM Suppression Ratio; 55dB
FM separation;  52dB @ 1kHz
  
TUNER SPECS FOR AM;
Tuning Range;
530-1610kHz
S/N; > 50db
Useable Sensitivity; 250μV / m with loop antenna
Selectivity; 32dB
Spurious Response Ratio; 50dB
Image Response Ratio; 40dB
Distortion @ 1kHz; 0.3%
  
PHONO SECTION SPECS;
Freq Response;
20-20kHz

S/N @ 5mV / Input shorted;
92dB with MM cart.
Input Sensitivity; 0.31mV w/ MM
Overload limit; 110 mV
  

Again, as stated before, we have completely gone through this YAMAHA RX-700U, Stereo Receiver cleaning and testing all and it gets our full 'Certification' . All functions test fine. Does have a few 'nicks' in the top panels thru the 'black' into the silver. Nothing serious and cannot be seen from the front panel. This receiver looks fine, works and sounds great!
Comes with an 'e' copy pdf, download of the YAMAHA RX-700U users / owners manual. Unit measures 17.2" wide x 5" tall x 11.25" deep and weighs 14 lbs unpacked. Includes our standard 90 day limited warranty.
YAMAHA RX-700U STEREO RECEIVER
Cond.
8+

SOLD 5/14/18
SHIPPED TO LARRY IN CALIFORNIA

W/ ORIGINAL WIRELESS REMOTE CONTROL


(Above text, in it's entirety, property of www.oaktreevintage.com / Oak Tree Enterprises, LLC. See 'Copyright Information' page for details)




 
    

       NEW LISTING 11/4/17
(Click on above thumbnails to enlarge photos)
CheckMarkSmall_web.jpg (792 bytes) warranty
RESTORED / REFURBISHED / FULLY SERVICED
VINTAGE
NAD STEREO RECEIVER
NAD 7120 RECEIVER
#...0199
 Circa 198
2-83
MIJ

for sale
Our technician has completely gone through and 'Certified' this unit. Unit disassembled, then everything was cleaned inside and out including all switches, controls and contacts. Extensive cleaning of unit internally. Controls were 'flooded' w/ 'De-OxId' and are quiet. Internal fuses checked for correct value / function and replaced where necessary. We also aligned the tuner front-end on both AM & FM bands for optimum performance as older tuner components will have 'drifted' over the years. Amplifier section had output bias and DC offset adjusted to spec levels. All indicators checked and are LED's for trouble-free service.
All inputs tested and both sides produce clean and even sine waves into 'brick-wall' 8 & 4 ohm loads! No power supply hum of any kind. It's dead silent! All functions test fine, including tuner pre-sets. Following restoration procedures, the unit was ran continuously at medium volume, as all our amplifier / receivers are, into a 4 Ohm load with "Loudness" on and both Tone Controls at 10 for 48+ hours. You will not be disappointed.


While this model was originally rated at 20 Watts / channel, on our test bench, this unit's (#...6031) amplifiers produced 17.4 Volts per channel at 8 Ohms for 37 Watts per channel or 13.4 Volts at 4 Ohms for 44 Watts per channel via discrete output devices. 

 AC Idle current at 1.2A, Bias adjusted and DC offset output adjusted within spec on either channel. Floor noise @ 0.0mV AC either channel.
 This NAD is even stable for limited amounts of time into 2 Ohms!

   _____________________________


Classic NAD 7120, Stereo Receiver. NAD gear is famous for very plain, almost military appearances, but solid performance with lots of headroom. I used to sell these new and never remember an NAD owner who wasn't proud to own one.


NAD 7120 Features include:
 

- 5 AM & FM station presets
- Manual Station / Frequency scanning
- Speaker output impedance selector 8 or 4 Ohms speakers (a very important aspect of this unit meaning that you can get 100% FULL output into just ONE set of 8 Ohm speakers. All amplifiers / receivers should have this)
- 'Externally Located' power amplifier output heat sinks allows heat to escape freely, instead of keeping the 'heat' inside the unit (all gear should be designed this way!)
- Loudness control
- Loudness Compensation function
- Low-Level EQ compensation switch
- AUX input for (Video / CD / DVD / VCR / DAT / MP3 / XM / SIRIUS / TV etc.)
- Phono / Turntable input with built-in Phono pre-amp.
- TRUE Tape monitor (Tape Monitors can be used with Tape / Video / CD / DVD / VCR / DAT / MP3 / iPod® / iPhone® / iTouch® / iGadget / MP3 / XM® / SIRIUS® CDR (CD recorders as well as for inserting signal processors, such as EQ's, Reverbs, Spatial Enhancers / Dynamic Processors, Noise Reduction units, Special Effects units, Time Delays, etc)
- NAD's "Soft Clip" feature for speaker protection and smoother sound at higher volumes (can be defeated)
- Bass EQ feature provides +6dB @ 32 Hz boost on the low-end
- 1/4" stereo headphone jack (kills output to speakers)
- 5-Pin DIN 17VDC / 50mA output for compatible accessories

- 1 'Un-switched' Convenience AC outlet


Original NAD 7120 Specifications:

"The NAD 7120 has a continuous power output of 20 Watts per channel min @ 8 Ohms from 20 hertz to 20,000 hertz with no more than 0.05% THD (measured utilizing AUX input)"
 
POWER / PRE AMP SPECIFICATIONS:

THD: 0.05% from 250mW to rated output of 20 Wpc @ 8 Ohms
'Clipping' Headroom at 8 Ohms: +1.5dB

Dynamic Headroom at 8 Ohms: +4dB
IHF dynamic MAX short term: 50W @ 8 Ohms, 58W @ 4 Ohms
Damping factor:
>50 @ 8Ω full bandwidth
Tone Control ranges:
Bass:
+/-10
dB @ 50Hz
Treble: +/-7dB @ 10kHz
Pre-Amp THD @ rated output: <0.05%
Pre-Amp S/N @ 'Tape' & 'AUX': >96dB ref 20W output


PHONO SECTION SPECS:
Freq Response:
20-20kHz +/-5dB
S/N:
75dB w/ MM cart w/ 5mV
RIAA Response Accuracy:
+/- 0.3dB
Input Sensitivity / Impedance:
0.5mV @ 47kΩ for 1 W and 2.5mV for 20 W output
Overload limit:
1.15V @ 20kHz

 
 Again, we have completely gone through this NAD 7120 Stereo Receiver, as stated above and 'certified' it's 'Ready To Go'!  Includes a pdf, 'e' copy, download of the NAD 7120 owners / users / instruction manual, and brochure.

This particular one also includes it's original box and packing.
Unit looks and sounds great! Measures 16.5" wide x 11.25" deep x 3.25" tall and weighs 12 lbs unpacked.
Cond. 9
NAD 7120
$349.
(C) C.B.S.



(Above text, in it's entirety, property of www.oaktreevintage.com / Oak Tree Enterprises, LLC. See 'Copyright Information' page for details)
 

 

 

 

 

 


 



Did you know?
Sansui was founded in 1947, just after WWII as a company manufacturing transformers (one of the most important components of any audio system). During the Sixties they morphed into what would become one of the most well respected companies in quality audio gear. I have owned and sold some incredible Sansui stereo gear from the Seventies and early Eighties. I worked at a Sansui dealer in the early part of the Eighties. Sansui remained a major force in stereo gear until about the mid Eighties, when the vast majority of audio gear started suffering from the 'how cheaply can we get it' syndrome by consumers, thus manufacturers followed suit, by building cheaper and cheaper gear.

 

 

 

Yamaha_R-700_Stereo_Receiver_web-b.jpg     Yamana_R-700_Receiver_Collage.jpg

       NEW LISTING 1/7/17
(Click on above thumbnails to enlarge photos)
CheckMarkSmall_web.jpg (792 bytes) warranty
RESTORED / REFURBISHED / FULLY SERVICED
VINTAGE
YAMAHA R-700 STEREO RECEIVER
#...0340
Circa '81-'83
MIJ

for sale

Our technician has completely gone through and 'Certified' this unit.
Everything was cleaned inside and out including all contacts, switches and controls. We tested all circuits associated with Yamaha IG04540 'voltage amplifier' pack as well as select resistors and checked for 'leaky' capacitors in the drive circuit. DC offset and bias PC mounted pots cleaned and current adjusted to within spec. Tuner 'memory capacitor' replaced. Entire unit cleaned / detailed cosmetically inside and out. All inputs tested and both side produces clean and even sine waves into static 8 & 4 ohm loads! No power supply hum of any kind. It's dead silent! All functions test fine. Following restoration procedures, the unit was run continuously at medium volume, as all our amplifier / receivers are, into a 4 Ohm load with "Loudness" on and both Tone Controls at 10 for 48 hours and into a 4 Ohm Load!

   

ü  On our test bench, each internal amplifier of this particular unit, #...0304, produced peak power of 25 Volts per channel for 78 Watts per channel at 8 Ohms and 21 Volts at 4 Ohms for 110 Watts per channel via dual Yamaha IG 04570 power pack output devices. AC idle current draw measured at 0.4A. Floor Noise Level tested at <1mVAC.
____________________________

    
Great Yamaha R-700 receiver designed in the tradition of the classic analog models, but with the convenience of a digital tuner. Very nice looking unit. Classic Yamaha "Satin" finish aluminum face and matching knobs.
Yamaha R-700 Features include:
  
- Digital tuning ('Auto' scanning only. No 'Manual' on the R-700)
- 5 AM & 5 FM tuner presets

- A, B and A+B speaker selector
- Separate Bass and Treble with high quality de-tented controls
- Record Out selector with bi-directional tape dubbing controls.
(Separate "Record Out" allows recording from one source while you listen to another. ALSO, it is the way you can utilize external EQ's, and Signal Processors with many Yamaha Receivers, as their 'Tape' buttons typically 'cancel' out the 'Input / Source' selected)
- Dual tape deck monitors (Tape Monitors can be used with Video / CD / DVD / VCR / DAT / iPod / MP3 / XM / SIRUS CDR (CD recorders as well as for inserting signal processors, such as EQ's, Reverbs, Spatial Enhancers / Dynamic Processors, Noise Reduction units, Special Effects units, Time Delays, etc)
- Phono / Turntable input with built-in phono pre-amp
- AUX Input (may also be used for Video / CD / DVD /DAT / VCR / MP3 / iPod® / iPad® / iPhone® / iTouch® / iGadget / MP3 / XM® / SIRUS®  etc.)
- Yamaha's exclusive Variable "Loudness" control
- Variable Spatial Expander built-in
- Hi filter for reducing tape hiss / electronic hiss & noise- and record static
- Stereo / Mono selector for entire 'Pre-Amp'
- FM muting / FM 'Stereo / Mono' function
- Auto 'Local / DX' selector
- Digital indicators for Station frequency, DX / Local mode, Stereo and Station Lock as well as an LED signal strength meter
- Triple AC convenience outlets located on the rear panel (1 switched @ 200 Watts and 2 un-switched @ 200 Watts for a total capacity of 400 Watts)

   
 Yamaha R-700 Original Specifications:

 
"The Yamaha R-700 has a continuous / RMS power output of 50 Watts per channel min. @ 8 Ohms from 20 hertz to 20,000 hertz with no more than 0.01% THD (measured utilizing AUX input)"
  
POWER / PRE AMP SPECIFICATIONS:

Freq Response / Bandwidth of power amp section;
@ 25 Watts / 8-Ω  5-40kHz
THD utilizing AUX;
0.02% @ 25 Watts 5-40kHz
Dynamic Headroom; 2.5dB! @ 8-Ω
Damping factor; >40 @ 8-Ω full bandwidth
Rated Power; 50 Wpc @ 8 Ohms @ 1kHz
Signal / Noise ratio;  100dB @ AUX / Tape
85dB @ Phono MM
Input Sensitivity AUX / Tape; 17mV
Tape Output level;
  120mV / 470-Ω
Bass Control Characteristics;  ±10dB @ 50Hz
Treble Control Characteristics;  ±10dB @ 10kHz (manual states at 20kHz, but that has to be a 'mis-print. Just FYI per Jerry at www.oaktreevintage.com .)
Treble Filter;  6dB / Oct @ 8kHz
Low Filter;  'Automatic' 12dB /Oct @ 10Hz
"Loudness" Contour;  Maximum -20dB @ 1kHz
  
TUNER SPECS FOR FM;
 
Tuning Range;
87.6-108 MHz
Freq Response;
30-15kHz ±0.5 dB
S/N; > 80db Stereo
S/N; > 84db Mono
50 dB Quieting Sensitivity:
Mono (DX) 3.2μV (15.3 dBf)
Stereo (DX) 25 μV (33.3 dBf)
Useable Mono Sensitivity (98 MHz, 30 dB Quieting);
2.5 μV (300 Ohms) 13.2 dBf
1.25 μV (75 Ohms) 13.2 dBf
Capture Ratio; 2.2dB DX, 1.5dB Loc
FM Selectivity; 68 dB
Spurious Response Ratio; 100 dB
IF Response Ratio; 100 dB
AM Suppression Ratio; 65 dB
FM separation;  50dB @ 1kHz
Auto DX Threshold; 30 μV / 34.8dB
  
TUNER SPECS FOR AM;
Tuning Range;
525-1605kHz
S/N; > 50db
Useable Sensitivity; 200μV / m with loop antenna
Selectivity; 30dB
Spurious Response Ratio; 50dB
Image Response Ratio; 40dB
  
PHONO SECTION SPECS;
Freq Response;
20-20kHz

S/N @ 5mV / Input shorted;
85dB with MM cart.
Input Sensitivity; 2.5 mV w/ MM
Overload limit; 250 mV
  

Again, as stated before, we have completely gone through this Yamaha R-700, Stereo Receiver cleaning and testing all and it gets our full 'Certification' . All functions test fine, with the exception of the tuning 'memory presets'. They can be a bit 'finicky' on this unit. Most of the time they work fine, but occasionally when you press one, you will get the station a few '10ths' off, ex: if you store "91.50", you might get "91.30" next time you go to that preset. If you press it once or twice more, it usually goes to the correct "91.50". Installing a new 'memory cap / battery' did not address the issue. Not likely an issue for most folks, but it's there
Dark Rosewood grained vinyl covered case in great shape as is the brushed aluminum face and matte finish knobs. This receiver looks near NEW, works and sounds great!

Comes with an 'e' copy pdf, download of the Yamaha R-700 users / owners manual. Unit measures 19" wide x 4.75" tall x 13.25" deep and weighs 20 lbs unpacked. Includes our standard 90 day limited warranty.
 YAMAHA R-700 STEREO RECEIVER
 Cond. 9

$329.00

- 
(Above text, in it's entirety, property of www.oaktreevintage.com / Oak Tree Enterprises, LLC. See 'Copyright Information' page for details)

 

 

 

Did you know?
It would be hard to name a category of 'musical instruments', 'audio equipment', 'motorized vehicles', or 'sporting equipment' that Yamaha does not have a 'hand in' with 'branded models'. Most folks do not realize this, but Yamaha is one of the oldest companies in existence, certainly when it comes to music gear and was actually established in 1887 and was incorporated on October 12, 1897! The company's origins as a musical instrument manufacturer is still reflected today in the group's logo—a trio of interlocking tuning forks. Yamaha has grown to become the world's largest manufacturer of musical instruments. I have worked for Yamaha dealers over the years, in both the 'consumer' level and 'pro-audio' / 'MI' level. Their gear was 'spec'd' more often in the military contracts we received, than any other brand. I knew when I sold a Yamaha unit, there was little chance of an 'issue after the sale'. Yamaha products are known as having about the best 'resale value' of any brand, regardless of the product class.

 

 

 

 



So, why do the older / 'vintage' receivers and amplifiers sound so much better (for music) than the much more modern and fancier, 'surround sound - '5.1', '7.1', '9 3/4.1' or '8.BR549' A/V receivers? (PART 1)

 Mostly due to Amplifier design and 'Amplification Classes' - All sound is a sinusoidal waveform. It has alternating peaks and valleys. The center point of each wave is the zero, or switching point that separates the positive (top) from the negative (bottom) portion of each wave. When a amplifier operates in 'Class A' , the output tubes or transistors amplify the entire waveform without splitting it into positive and negative halves. In 'Class AB', (used in the majority of classic receiver / amplifier designs), the signal is split into two halves, positive and negative, and each half is sent to a tube or transistor circuit for amplification. Both sides work in tandem, and the two halves are recombined at the output section to reconstruct the whole signal. This technique increases the amount of power that can be applied, but increases distortion.
In many 'modern' A/V and subwoofer amps, 'Class-D' is the dominant design method. Class D operation is essentially a rapidly switching power amplifier. Here the output devices are rapidly switched on and off at least twice for each cycle. Theoretically, since the output devices are either completely on or completely off they do not dissipate any power (heat), greatly increasing efficiency and lowering manufacturing cost thru lesser parts and lighter freight weight. Not musically the best sounding design for listening to standard, 2-channel music (Radio, Vinyl, CD'S, DAT, Tape (not 'crappy' compressed, MP3 formatted files), but popular for 'A/V-Surround-Sound' systems for reproducing 'movie sound tracks' (not too difficult to do from a 'sonic quality standpoint') where slightly elevated levels of distortion are tolerated and for subwoofer use where maximum power is necessary, and slightly elevated levels of distortion are also easily tolerated...Cont in Part 2 (also on this page)

Excerpts of the above text from the website of one of the best Car Audio sites and stores in the world, 'Car-Fi' www.car-fi.com .

  


 

 

 

- - -

 

 



Did you know?

What is the difference between a ‘Tuner’ and a ‘Receiver'?

A ‘Tuner’ is the component or aspect of an audio system that receives or ‘Tunes-In’ Radio Stations.
A 2-channel, stereo ‘Receiver’ is really 3 units in one!
It’s a ‘Tuner’ for receiving radio stations. It’s a ‘Pre-Amp / Control-Amp’ for source / input selection & tone / audio signal modification (with likely the phono 'pre-amp / head-amp' built-in). Lastly it’s a ‘Power Amplifier’ to energize your speakers. It's essentially the 'heart' of most audio / stereo systems.
Some manufacturers would silk-screen 'Tuner-Amplifier' on the front of their receivers, but that was / is simply 'marketing' to make it sound as if it's something more complicated. It's still a 'receiver'. Just FYI.


 
 

 

 

What is a 'Receiver' and how is it different than a 'Tuner' or an 'Amp'?
The term 'Receiver' refers to a combined unit consisting of at least 3 aspects incorporated into one. The 3 basic units are the AM/FM 'Tuner' or radio, a 'Pre-Amplifier' / 'Control-Amp' and a 'Power-Amplifier' all combined in one 'box'. Originally the general consensus was that 'receivers' did not perform as well as 'separates' and were sonically inferior. While this may have been the case early on, as in the

 

late 1950's to early '60's, technology improved quickly and by the mid-late 60's the arguments for separates over receivers for most 'mid-level' consumer Hi-Fi applications were generally without merit. For 95% of home-audio listeners, a receiver will be more than ample.

 




 

Click here for our Restoration Procedures



 
- -  

 

Jerry Gahagan of OakTreeVintage
Taken in portion of Speaker Audition Room
Vintage Home Audio Speakers from the late 1960's into the 1980's

 

 

-
SOLD ITEMS BELOW

 



 

 
 


CLICK HERE TO SEE OUR ARCHIVE OF
 SOLD RECEIVERS.
 

WE WILL LIKELY GET MORE OF THEM AGAIN!!!

   

 

NEW ADDITION 12/18/17
(Click on above thumbnails to enlarge photos)
CheckMarkSmall_web.jpg (792 bytes) warranty
RESTORED / REFURBISHED / FULLY SERVICED
VINTAGE KENWOOD STEREO RECEIVER
KENWOOD KR-6030 (KR-6330)
'SILVER FACE'
340 DYNAMIC WATTS PER CHANNEL!

#...1907
Circa 1978

MIJ!
for sale

SOLD 12/21/17
SHIPPING TO CALIFORNIA


ü Our technician has completely gone through and 'Certified' this unit.

ü We have completely gone through this unit cleaning everything including all switches, controls and contacts. Extensive cleaning of unit internally.

ü Line cord replaced

ü Power Switch replaced

ü Controls were 'flooded' w/ 'De-OxId' and are quiet
(very difficult to do as 'tone' section must be painstakingly removed).

ü Reflowed power resistors on PS board

ü Switches such as the 'Function' selector and the 'Tone Bypass' switch were also flooded with cleaner.

ü We also aligned the tuner front-end on both AM & FM bands for optimum performance as older tuner components will have 'drifted' over the years.

ü AM 'Stick' ferrite core adjusted for optimum reception and minimal noise

ü AM 'Stick' antenna 'ball and socket' inspected and is holding well.

ü Tuner string checked for any fraying then re-tensioned to increase traction & relieve flywheel binding and re-centered pointer to correct dial position.

ü We replaced ALL dial & meter lamps, and the 'Stereo' indicator with new bulbs for trouble-free service. 

ü Both power supply filter capacitors test fine (hence the super low noise floor and clean sine waves mentioned below)

ü All inputs tested, including both Phono inputs

 
ü Both amplifiers produce clean and even sine waves into 'brick-wall' 8 & 4 ohm loads! No power supply hum of any kind. It's dead silent!

ü All functions test fine

Following restoration procedures, the unit was ran continuously at medium volume, as all our amplifier / receivers are, into a 4 Ohm load with "Loudness" on and Tone Controls at 10 for 48 hours. Total restoration time investment ~12 hours. You will not be disappointed.


VERY GOOD TUNER! Generally AM reception in a stereo receiver is treated as an 'after thought', but the AM reception on this one is WAY above average. Pulls in stations like an old 'Tube' radio! FM reception also incredible and IMPECCABLY CLEAN!!!

   
 From the original Kenwood KR-6030 manual,
"80 Watts per channel minimum RMS, both channels driven, at 8 Ohms from 20-20,000 Hz with no more than 0.1% harmonic distortion"

   
ü  On our test bench, the internal amplifiers of this receiver #...1907, produced 28 Volts per channel @ 8 Ohms with 1KHz input for 98 Watts and 24 Volts per channel @ 4 Ohms with 1KHz input for 144 Watts via discrete, TO3, metal cased outputs. (2x 2SC1116 & 2x 2SA747)
 AC Idle current at .4A, & floor noise L&R -60dBm

  _____________________________


All original milled, aluminum Kenwood knobs intact. With the exception of a couple of very minor cosmetic issues, such as some small 'tics' near a couple of controls, and a 'blem' on the plastic dial window bezel (see photos above), the receiver is in fabulous cosmetic condition. Nothing at all distracting. It really is GREAT looking!
Fairly 'large' power (100+ Watts per channel), vintage, 2-channel audio from Kenwood.
Beautiful 'Brushed Silver', aluminum face with  backlit analog, slide rule tuning dial and analog tuning meters.

Kenwood KR-6030 Features are:
   
-
Weighted flywheel analog AM/FM slide-rule tuning with lighted dial pointer
- Separate Bass & Treble EQ with super quality de-tented controls
- Super quality, Volume control
- Tone Defeat selector for 'purest' signal path if desired
- Dual Pair Speaker Selector; A, B, or A+B or Off speaker selector (two pair at a time)
- Built-in Subsonic Filter to eliminate excess rumble from sources such as turntables
- Loudness to accentuate bass response at lower volumes
- Dual Analog '
d'Arsonval' meters for tuning and signal strength
- Stereo / Mono selector & 'FM Muting' to eliminate 'hiss' between stations.
- Rear mounted FM 'De-Emphasis' selector for either 25μsec, 50μsec or 75μsec
- Stereo indicator
- Aux inputs (may also be used for Video / CD / DVD /DAT / VCR / MP3 / iPod® / iPad® / iPhone® / iTouch® / iGadget / MP3 / XM® / SIRUS®  etc.)
- Dual tape monitors (Tape Monitors can be used with Video / CD / DVD / VCR / DAT / MP3 / iPod® / iPad® / iPhone® / iTouch® / iGadget / MP3 / XM® / SIRUS® CDR (CD recorders as well as for inserting signal processors, such as EQ's, Reverbs, Spatial Enhancers / Dynamic Processors, Noise Reduction units, Special Effects units, Time Delays, etc)
- Phono / Turntable input w/ built-in Phone Pre-Amp
- Built-In AM 'Stick' Antenna
- 1/4" Stereo Headphone Jack
- Dual AC convenience outlets; 1 'Switched' and 1 'Un-Switched for a total rated capacity of 300 Watts

Kenwood KR-6030 Original Specs:
  
POWER / PRE AMP SPECIFICATIONS:
Power output @ 1kHz / Both Channels driven: 100Wpc @ 4 Ohms
83Wpc @ 8 Ohms

340 Watts 'dynamic power' @ 4 Ohms
THD;
0.1% @ full rated power & 8 Ohms 0.05% @ 1/2 power
IHF IMD; 0.1% @ full rated power & 8 Ohms
Potential power bandwidth power amp section; 5-50,000kHz
Damping factor; 50 @ 8Ω / 1kHz
Signal / Noise;  98dB @ AUX / Tape ('shorted')
Input Sensitivity AUX / Tape; 150mV @ 45
Bass Control;  ±10dB @ 100Hz
Treble Control;  ±10dB @ 10kHz
Low Filter; 6dB / Oct @ 18Hz
Loudness Control; +9dB @ 100Hz (-30dB VOL)
Output levels / impedance; Tape RCA 150mV / 100 Ohms
DIN 30mV / 80kOhms
 
TUNER SPECS FOR FM;
Tuning Range;
88-108MHz
Freq Response; 50-15kHz
50 dB Quieting Sensitivity:
Mono (DX) 2.8μV (14.1 dBf)
Stereo (DX) 36μV (36.3 dBf)
Useable Mono Sensitivity (98 MHz, 30 dB Quieting);
1.7μV / 9.8dBf
S/N @ 65dBf; >73db Mono or 68dB Stereo
Capture Ratio @ 65dBf; 1.2dB
THD Mono @ 1kHz; 0.15%
THD Stereo @ 1kHz; 0.25%
FM Alternate Channel Selectivity; 85dB
Image Response Ratio; 75dB
Spurious Noise Ratio; 95dB
IF Response Ratio; 90dB
AM Suppression; 60dB
Stereo Separation; 45dB @ 1k & 35dB @ 50-15kHz
Subcarrier Product Suppression; 62dB

TUNER SPECS FOR AM;
Tuning Range; AM Band 540 kHz-1600 kHz
S/N; 
>50db
Useable Sensitivity (IHF Bar Antenna); 15μV
Selectivity; 33dB @ 1kHz
Image rejection; 50dB @ 1kHz
 
PHONO SECTION SPECS;
Freq Response;
Standard RIAA curve, deviation; ±0.3dB
S/N; >75dB, IHF-A curve
Input Sensitivity; 2.5mV @ 50kΩ
Overload limit; 250mV @ 1k w/ 0.1% THD

 
Again, we have completely gone thru this unit and it's 'Ready To Go'! This is a Decent Power, classic receiver from 1978! The unit looks fabulous, works and sounds great! Includes a pdf, e-copy download of the Kenwood KR-6030 owners / users / instruction manual. Receiver measures 19" wide x 16" deep x 5.8" high and weighs 31lbs unpacked. Includes our standard 90 day limited warranty.
Kenwood KR-6030 Stereo Receiver
Cond. 8.5

(C) R.R.

SOLD 12/21/17
SHIPPING TO CALIFORNIA

(Above text property of www.oaktreevintage.com / Oak Tree Enterprises, LLC. See 'Copyright Information' page for details)

 

 

   

    

     


         NEW LISTING 11/5/16

  (Click on above thumbnails to enlarge photos)
CheckMarkSmall_web.jpg (792 bytes) warranty
RESTORED / REFURBISHED / FULLY SERVICED
VINTAGE
PIONEER STEREO RECEIVER
PIONEER SX-1980 RECEIVER
PIONEER'S FLAGSHIP
THE 'BIGGEST' 'BADDEST' RECEIVER TO EVER COME OUT OF THE PIONEER FACTORY
HUGE POWER AND SIZE!
340+ Watts PER CHANNEL!!!
"NOT FOR THE 'FAINT OF POCKET-BOOK'
"
#...0723
Circa 1978-79
MIJ

SOLD 3/27/17
SHIPPING TO MONTANA
-

ü Our technician has completely gone through and 'Certified' this unit. Everything was cleaned inside and out including all switches, controls and contacts. Extensive cleaning of unit internally.

ü Power Supply circuit board and both driver boards had all of their 'electrolytic capacitors' replaced (a note on this; prior to replacing the capacitors, we 'dialed the unit in perfectly' for DC offset, Bias and clean output sine waves to beyond rated power. After replacing all the Electrolytics on the power supply circuit board and the amplifier driver boards, the unit was again measured to perfect levels. The old capacitors ALL checked fine, so basically we have baggies of about 50, 35 year old capacitors that are in fine shape. Just FYI.)

      

     


ü Control potentiometers were 'flooded' w/ 'De-OxId' and are quiet (very difficult to do as 'tone' section must be painstakingly removed).

ü ALL Switches were flooded with cleaner with emphasis especially on the always at issue, switches / controls such as the 'Function' selector, 'Tape Monitors', '-20dB Muting', and 'Tone Bypass'.


ü  Internal fuses checked for correct value / function and replaced where necessary (and there were some 'in-correct' values we found).

ü  World AC Power correctly set for North American current.

ü This unit has a tuner based on the other Pioneer models, with a couple of additional circuits. The additional circuits are the 'Quartz Lock' and the 'Fine Tune', both of which are indicated by LED's near the 'Stereo' LED indicator. These two additional circuits are an issue with SX-1980's we've discovered, and escalating the unit to an outside tech firm, did not improve their function. While the unit's tuner sounds great, it will drift after being left on for a few hours. Could be 2 or could be 24, but it will drift and need a slight 'nudge' on the tuning knob to bring it back into station center. Also, the 'Fine Tune' light is on when the station is slightly 'off center', and not when it's perfectly tuned. Both our senior techs and two outside repair shops, 'senior techs' spent 8-10 hours on these two aspects, with no appreciable improvement. The 4th tech discovered that the unit could be put into a mode which defeated the additional circuits (which when left intact caused a very faint, cyclical noise), so now it functions like the tuner on the Pioneer SX-1280, 1080, 980. Sonically the tuner sounds great, pulls in stations fine, has great side band rejection, and great 'Stereo' sound. Only issue is the above mentioned 'drift' after a few straight hours of running.

ü  We of course aligned the tuner front-end on both AM & FM bands for optimum performance as older tuner components will have 'drifted' over the years.

ü  Amplifier section had output bias and DC offset adjusted to spec levels

ü  We bought ALL the remaining AEL-029 dial bulbs from Pioneer a few years ago. These are the original, official 'Stanley 8V' with blue tinting. We purchased a couple dozen and are probably worth their weight in gold. We have not used them on any of our Pioneer restoration, and have been using a fine substitution. We were saving them for a Pioneer SX-1980 to come along. Well, this unit got them. All four dial lamps and meter lamps replaced with ORIGINAL PIONEER AEL-029's. The balance of the light bulbs, including ALL indicator lamps, the dial pointer lamp, Speaker indictors, 'Stereo' indicator, input / function indicators were replaced with new.

ü All 4
power supply filter capacitors independently tested.

ü All inputs tested and both sides produce clean and even sine waves into 'brick-wall' 8 & 4 ohm loads!

-VERY GOOD FM TUNER!
- FM reception as well great and IMPECCABLY CLEAN!!! All inputs tested and both sides produce clean and even sine waves into 'brick-wall' 8 & 4 ohm loads! No power supply hum of any kind. It's dead silent! All functions test fine. Following restoration procedures, the unit was ran continuously at medium volume, as all our amplifier / receivers are, into a 4 Ohm load with "Loudness" on and both Tone Controls at 10 for 48 hours into a 4 Ohm load. Cosmetically, the top, horizontal edge of the face plate has some light / shallow striations running it's length, there's a scuff on the volume knob, and at some point in it's past, the Walnut, wood 'half bonnet' was re-veneered in a lighter shade of walnut (see photos above). Again, overall this is a fabulous receiver. You won't be disappointed. Total restoration time investment between two senior techs ~38 hours.  

ü  On our test bench, the internal amplifiers of this receiver #...0723 produced 45 Volts per channel @ 8 Ohms with 1KHz input for 253 Watts and 37.4 Volts per channel @ 4 Ohms with 1KHz input for 349 Watts via discrete outputs with 1 kHz input.
 AC Idle current @ .7A,
DC balance adjusted to 0 ±3mVDC and DC offset output adjusted to <~30mVDC either channel. Floor noise measured 0mVAC / >60dB either channel.
   ____________________________


The Pioneer SX-1980 Stereo Receiver. This is the first one of these we've had in 19 years. Even as a Pioneer dealer, back in the day, the stores I worked at didn't carry this model as it was generally TOO EXPENSIVE for the market (equaling about 10% of the average persons yearly take-home pay).
Classic looking brushed-aluminum silver face and encased in a real wood Walnut veneer cabinet with solid Walnut wood corner caps. This is the most SERIOUS receiver Pioneer ever marketed and as listed above, this one has been 'certified' following the refurb by Oak Tree Vintage and is in incredible condition!!! 
An interesting note on this one is that the consignor picked it up from a member of the Denver based, 1970's band, 'Sugar Loaf'
(famous for hit's such as "Green Eyed Lady" and "Don't Call Us, We'll Call You"). It was speculated to have been the amp in their practice space.

Pioneer SX-1980 Features:
 

Tuner features:
- Weighted flywheel analog "slide-rule" tuning
- FM Muting Selector (separate from the 'Stereo' selector)
- Dual analog 'Signal Strength' and 'Tuning' VU meters
- FM Multi-Path Detector (handy when installing antenna for best positioning)
- Dual position FM De-emphasis selectable for 25 or 75 msec 

Pre-Amp / 'Control Amplifier' / Power Amp features:
- Direct Coupled (DC) Power Amp architecture
- A or B or C, or A+B or A+C, or Off speaker selector
- Defeat-able 4-control / 2-band EQ. (Bass controls centered at 50 or 100 Hz and Treble @ 10k or 20kHz)
- Super quality de-tented Tone and Volume controls
- "Loudness" function to boost Bass and Treble in relationship to Mid frequencies at lower volume levels for a much fuller sound.
- Stereo / Mono selector (for entire pre-amp section, not just FM tuner)
- Hi filter for reducing tape hiss / electronic hiss & noise and record static
- Built-in 'Low' Filter to eliminate excess rumble from sources such as turntables
- Pre-Amp Out / Power-Amp Input / Loop
- Dual analog 'Power' VU meters
- -20dB Audio Muting for instant lowering of volume without adjusting the volume control. Great for ringing phones and cuing a record on your turntable

Inputs:
- Dual Phono / turntable inputs with Built-In Phono Pre-Amp
- Dual tape monitors with standard RCA I/O's (Tape Monitors can be used with Tape / Video / CD / DVD / VCR / DAT / MP3 / iPod® / iPhone® / iTouch® / iGadget / MP3 / XM® / SIRUS® CDR (CD recorders as well as for inserting signal processors, such as EQ's, Reverbs, Spatial Enhancers / Dynamic Processors, Noise Reduction units, Special Effects units, Time Delays, etc)
 - Tape 'Dubbing' capability for Tape 1 to Tape 2
- Aux input (may also be used for Video / CD / DVD /DAT / VCR / MP3 / iPod® / iPhone® / iTouch® / iGadget / MP3 / XM® / SIRUS®  etc.)
- Microphone input (be very careful with your 'home audio' speakers when inserting a mic into any stereo receiver)
- 1/4", stereo headphone jack
- Dual Phono inputs with phono 2 doubling as the Microphone input
- 4- Position phono cartridge loading selector with settings at 100, 200, 300 or 400pf for fine tuning phono pre-amp
- 3- Position cartridge impedance selector with settings at 10k, 50k, or 100k for fine tuning phono pre-amp
to your cartridge (a must for serious vinyl players)
- 1/4" front mounted Microphone input
- -20db Audio Muting

Other:
 - Pre-out / Main-in loop
 - 3 AC outlets (1 switched / 2 un-switched) for a total capacity of 300 Watts


Original Pioneer SX-1980 Specifications:


  "The Pioneer SX-1080 has a continuous power output of 270 Watts per channel min @ 8 Ohms, from 20 hertz to 20,000 hertz with no more than 0.03% THD (measured utilizing AUX input)"
 
POWER / PRE AMP:

THD:
0.02% @ 135 Wpc @ 8 Ohms & 0.03% @ Full Rated Output @ 8 Ohms
Freq Response of power amp section:
@ full rated power 20-20kHz. @1W it's rated down to 0.006%
Potential frequency response of power amp section @ 1w:
5 Hz to 100 KHz, +0 dB, -3 dB
IMD utilizing AUX: 0.03% @ 270 Wpc 20-20kHz
0.02% @ 135 Wpc 20-20kHz
0.006% @ 1 Wpc 20-20kHz

Hum / Noise (S/N) Ratio: 120dB (10 db greater than the Pioneer SX-1080)
Damping factor:
40 @ 8Ω full bandwidth
Power Amp Input Impedance:
50k Ohms
Power Amp Input Sensitivity for Full Output:
2V (coupled with the 2V output of the pre-amp, has a lot to do with the VERY high S/N listed above)
Tone Control ranges:

Sub Bass: +/-5dB @ 50Hz
Bass:
+/-10dB @ 100Hz
Treble: +/-10dB @ 10kHz
Upper Treble: +/-5dB @ 20kHz
Hi Filter: 6
KHz, 12dB/octave
(most are 6dB/ octave)
Lo / 'Sub' Filter: 15Hz, 12dB/octave (most are 6dB/ octave)
Loudness Contour: + 6dB at 100 Hz, + 3dB at 10KHz at -40dB on volume control
Pre-Amp Input Impedance: 50k Ohms
Pre-Amp Input Sensitivity at all inputs except phono & mic: 150mV
Microphone Input  Sensitivity / Impedance: 7.5mV / 50k Ohms
Input Freq Response (except Phono & Mic): 5-80kHz
Tape Output Impedance: 50kΩ
Tape Output:
150mV

Pre-Amp Output
Level & Impedance: 2V / 1k Ohms (coupled with the 2V input of the power-amp, has a lot to do with the VERY high S/N listed above and double the SX-1080)
Pre-Amp THD @ rated output: <0.01%

TUNER SPECS FOR FM:
Freq Response:
The full 30-15kHz per FCC Regulations
S/N:
 > 85 dB Mono @ 65dBf
S/N: 
> 75 dB Stereo @ 75dBf
Useable Mono RF Sensitivity dBf / μV:
8.7dBf / 1.5μV
Capture Ratio:
1.0dB
Signal for 50dB quieting, Mono dBf / μV:  
11.5dBf / 2.2μV
Signal for 50dB quieting, Stereo dBf / μV:  36dBf / 34μV
De-Emphasis: selectable 25 or 75 μ-sec
THD w/ 100% modulation @ 100Hz, Mono: 
0.05%
THD w/ 100% modulation @ 1kHz, Stereo: 
0.07%
THD w/ 100% modulation @ 6kHz, Mono:  0.02%
IF Response Ratio: 
120dB
(20db greater than the Pioneer SX-1080)
Stereo Sub-Carrier Rejection: 
65dB

AM Carrier Rejection:
60dB
(5db greater than the Pioneer SX-1080)
Spurious Rejection:
120 dB
(30db greater than the Pioneer SX-1080)
Image Response Ratio:
120 dB
(30db greater than the Pioneer SX-1080)
FM Alternate Channel Selectivity: 
80dB
Muting Threshold dBf / μV:
19.2dBf / 5μV
Stereo Separation:
50dB @ 1kHz or 40dB @ 30-15kHz

TUNER SPECS FOR AM:

RF Sensitivity: 300uV/meter or 15uV @ binding posts
Alternate Channel Selectivity:
26dB
IF Response Rejection Ratio:
70dB
(30db greater than the Pioneer SX-1080)
Image Response Rejection Ratio:
70dB
(30db greater than the Pioneer SX-1080)
Signal to Noise Ratio:
55dB
(5db greater than the Pioneer SX-1080)

PHONO SECTION SPECS:
Freq Response:
20-20kHz ±0.2dB
S/N:
87dB, ref 'shorted' input (11dB greater than the PIoneer SX-1080!!!)
Input Sensitivity:
2.5 mV with load selectable 10k, 50k or 100kΩ
Overload limit:
300 mV @ 1kHz w/ THD of 0.03%
Cartridge Load Capacitance: 100,200,300,400pF


Huge power supply in the Pioneer SX-1980 featuring Dual independent, toroidal transformers (in one housing) for a 'TRUE DUAL POWER SUPPLY', followed by 4X 100V / 22,000μF power supply filter caps to feed the huge output transistors.
Again, we have completely gone through the Pioneer SX-1980 Stereo Receiver, as stated above and 'certified' it's ready to go!
The only 'performance' issues would be the previously mentioned tuner LED's in FM mode, and cosmetically, the scuffs on the top, horizontal face edge, the volume knob scuff and the lighter, real wood Walnut cabinet.  Unit looks great and sounds HUGE! This is truly one of the "BIGGEST BOYS" when it comes to CLASSIC STEREO RECEIVERS! Includes a pdf, 'e' copy, download of the Pioneer SX-1980 owners / users / instruction manual, Service manual and original brochure if the purchaser so desires. Measures 22.25" wide x 20" deep x 8.25" high and weighs a HEAVY 73 lbs unpacked. Includes our 90 day limited warranty!
PIONEER SX-1980 STEREO RECEIVER
 Cond. 8.5
$6,300.00
SOLD 3/27/17
SHIPPING TO MONTANA

(C) M.R.

links to a couple of "Shoot Out" articles featuring the SX-1980;


https://www.cnet.com/news/how-can-30-year-old-receivers-sound-better-than-new-ones/

http://www.iavscanada.com/receiver-shoot-out-vintage-vs-high-tech/

(Due to the dimensions and / or weight of this receiver, Packing / Shipping will be somewhat more 'involved' than typical. A custom built box may be necessary to order. While we order custom built boxes often, this can sometimes delay shipping by 5-10 days)

(Above text property of www.oaktreevintage.com / Oak Tree Enterprises, LLC. See 'Copyright Information' page for details)
 

 

    

NEW LISTING
12/30/16
(Click on above thumbnails to enlarge photos)

CheckMarkSmall_web.jpg (792 bytes) warranty

RESTORED / REFURBISHED / FULLY SERVICED
VINTAGE
PIONEER STEREO RECEIVER
PIONEER SX-V90 RECEIVER
HUGE POWER AND SIZE!

217 Watts / CHANNEL!*
#...0
23S
Circa 1984-85
MIJ

SOLD 4/19/17
SHIPPING TO CALIFORNIA

VERY impressive looking and performing digital "Power-House" receiver. Features "Non-Switching" Amplifier for quieter performance. Handsome mixture of the classic silver face look with digital tuner performance. Readout looks like a Corvette dashboard when fired up.

Our technician has completely gone through and 'Certified' this unit.

ü  Unit disassembled, then everything was cleaned inside and out including all switches, controls and contacts.

ü  Extensive cleaning of unit internally.

ü  Controls were 'flooded' w/ 'De-OxId' and are quiet. Internal fuses checked for correct value / function and replaced where necessary.

ü  We also checked the tuner front-end on both AM & FM bands for optimum performance as older tuner components may have 'drifted' over the years.  

ü  Amplifier section had output bias and DC offset adjusted to spec levels.  

ü  All indicators checked and are LED's for trouble-free service.

ü  All inputs tested and both sides produce clean and even sine waves into 'brick-wall' 8 & 4 ohm loads! No power supply hum of any kind. It's dead silent!  

ü  All functions test fine, including tuner pre-sets.  

ü  Following restoration procedures, the unit was ran continuously at medium volume, as all our amplifier / receivers are, into a 4 Ohm load with "Loudness" on and both Tone Controls at 10 for 48+ hours. You will not be disappointed.

ü  While this model was originally rated at 125 Watts / channel, on our test bench, this unit's (#...023S) amplifiers produced 32 Volts per channel at 8 Ohms for 128 Watts per channel or 29.5 Volts at 4* Ohms for 217 Watts per channel. Floor noise measured at 0mVAC. 
 AC Idle current at 900mA. DC offset adjusted to <13mV L or R. Bias adjusted

Pioneer SX-V90 Features include:


-  Digital Quartz synthesized  tuning with 10 presets for both AM & FM
-  Auto / Manual tuning modes
- Digital signal strength indicator
- FM tuner steps selectable between 50kHz or 100 kHz
- AM tuner steps selectable between 9kHz or 10kHz
- FM De-Emphasis selectable between 50 msec or 75 msec
- Non-switching Amplifier transistors
- Built-in Subsonic filter for reducing turntable rumble
- Stereo / Mono mode selector
- Loudness switch
- Separate Bass and Treble
- Electronic volume control
- Dual Phono / turntable input
- Dual tape monitors with standard RCA I/O's (Tape Monitors can be used with Tape / Video / CD / DVD / VCR / DAT / MP3 / iPod® / iPhone® / iTouch® / iGadget / MP3 / XM® / SIRUS® CDR (CD recorders as well as for inserting signal processors, such as EQ's, Reverbs, Spatial Enhancers / Dynamic Processors, Noise Reduction units, Special Effects units, Time Delays, etc)
- Tape 'Dubbing' capability for Tape 1 to Tape 2
- CD input (may also be used for Video / CD / DVD /DAT / VCR / MP3 / iPod® / iPhone® / iTouch® / iGadget / MP3 / XM® / SIRUS®  etc.)

- 3 Video Inputs
(may also be used for Video / CD / DVD /DAT / VCR / MP3 / iPod® / iPhone® / iTouch® / iGadget / MP3 / XM® / SIRUS®  etc.)
- Video 1 to 2 copy

- Moving Coil / Moving Magnet phono cartridge selector
- 20 dB Audio Muting
- 2 quick access volume presets
- Simulated Stereo for video inputs

- Front and Rear Video outputs
- Pre-amp out / Power amp in loop
- Built-in AM ferrite stick antenna on swivel mount
- Dual AC outlets (1 switched / 1 un-switched)
-True WORLD AC POWER  allows unit to be operated on 50 or 60 Hz AC and will select voltages from 110v, 120v, 220v and 240 Volts AC input. 


Original Pioneer SX-V90 Specifications:

"The SX-V90 has a continuous power output of 125 Watts per channel min. @ 8 Ohms from 20 hertz to 20,000 hertz with no more than 0.005% THD (measured utilizing AUX input)"
 
POWER / PRE AMP SPECIFICATIONS:
THD: 0.005% @ full rated power
Freq Response of power amp section: @ full rated power 20-20kHz
Potential frequency response of power amp section @ 1w: 5 Hz to 100 KHz, + 0 dB, - 1,5 dB
 
IMD utilizing AUX: 0.005% @ full rated power / 20-20kHz
Hum / Noise Ratio: 100dB
Freq Response of PRE-amp section (non-phono input): @ full rated power 5-100kHz
Input Impedance:
50k Ohms
Input Sensitivity for Full Output:
1V

Tone Control ranges:

Bass:
+/-8dB @ 100Hz
Treble: +/-8dB @ 10kHz
z

Lo Filter: 20 Hz, 6 dB/octave
Loudness Contour w/ vol @ -40dB: + 6 dB at 100 Hz, + 3 dB at 10 KHz
Pre-Amp Output: 1V / 50k Ohms

TUNER SPECS FOR FM:

Tuning Range:
87.5MHz-108MHz
Freq Response:
20-15kHz (limited per FCC regs)
S/N: 
> 82 dB Stereo @ 80dBf
S/N:
 > 88 dB Mono @ 80dBf
Useable Mono RF Sensitivity in dBf:
10.8 dBf
Useable Mono RF Sensitivity in μV:
.95 μV
Capture Ratio:
1.0dB
THD w/ 100% modulation @ 1kHz, Mono: 
0.02%
THD w/ 100% modulation @ 1kHz, Stereo: 
0.04%
Spurious Rejection: 29.3 dBf (8μV)
Auto Tuning Level required: 100 dB
FM Alternate Channel Selectivity: 
85dB @ 40kHz (narrow)
Stereo Separation @ 1kHz: 
60dB (wide)

TUNER SPECS FOR AM:

RF Sensitivity:
220 uV/meter or 10 uV @ binding posts
Alternate Channel Selectivity: 60 dB
Signal to Noise Ratio: 50 dB

PHONO SECTION SPECS:
Freq Response:
20-20kHz
S/N MM:
86 dB
S/N MC:
67 dB
Input Sensitivity MM:
2.5 mV @ 50kΩ
Input Sensitivity MC:
0.25 mV @ 100kΩ
Overload limit MM:
150 mV
Overload limit MC: 14 mV


This receiver is in great functioning and cosmetic condition. As well as being 'HUGE' output power, it's 'specs' are impressive from both tuners, thru the pre-amp, on out to the amp outputs (check the specs above against other units). We have completely gone through this unit cleaning all contacts, controls, switches and pots. All functions test perfectly. 

This is one of the "BIG BOYS" when it comes to STEREO RECEIVERS! Includes a pdf, 'e' copy, download of the Pioneer SX-V90 owners / users / instruction manual. Measures 16.5" wide x 17.25" deep x 6" high and weighs 33 lbs unpacked. Includes our 90 day limited warranty!
PIONEER SX-V90 STEREO RECEIVER
Cond. 8.5++

SOLD 4/19/17
SHIPPING TO CALIFORNIA


(Above text, in it's entirety, property of www.oaktreevintage.com / Oak Tree Enterprises, LLC. See 'Copyright Information' page for details)

 
    

NEW LISTING 3/22/17
(Click on above thumbnails to enlarge photos)
CheckMarkSmall_web.jpg (792 bytes) warranty
RESTORED / REFURBISHED / FULLY SERVICED
VINTAGE
SANSUI STEREO RECEIVER
SANSUI 661
#...0083
Circa 1974-76
  "
WORLD AC POWER"
MIJ
SOLD 3/23/17
SHIPPING TO MONTANA

ü  Our technician has completely gone through and 'Certified' this unit.

ü  Everything was cleaned inside and out including all contacts, switches and controls.

ü 
AC voltage selector corrected and correct NEW 'mains' fuse installed

ü  Skewed control shafts straightened

ü  All question-able and common 'stress point' solder joints re-flowed

ü  Bias current adjusted to correct level

ü  DC offset adjusted to a low level ‘0’ mVDC (±10) on either channel

ü  Headphone floor noise tested and found to be very quiet, to MAX volume

ü  We also aligned the tuner for optimum AM & FM performance as older internal tuner components have always drifted on vintage gear over the years.
VERY GOOD TUNER!
AM reception WAY above average, FM reception incredible, PUNCHY, with GREAT SEPARATION and IMPECCABLY CLEAN!!!

ü  All meter, dial, and FM stereo indicator and FM function lamps replaced for trouble-free service

ü  Entire unit cleaned / detailed cosmetically inside and out.

ü  All inputs tested and both sides produce clean and even sine waves into static 8 & 4 ohm loads! No power supply hum of any kind. It's dead silent! All functions test fine.

ü  Following restoration procedures, the unit was run continuously at medium volume, as all our amplifiers / receivers are, into a 4 Ohm load with "Loudness" on and both Tone Controls at 10 for 48 hours and into a 4 Ohm Load!

We also aligned the tuner for optimum performance on both AM and FM. All functions tested for perfect operation. All inputs tested and both sides produce clean and even sine waves! No power supply hum of any kind. It's dead silent! Tone controls are super quality, Alps brand, "full-size", de-tented potentiometers. All functions tested for perfect operation.

You will not be disappointed. Total restoration time investment ~7 hours.  

ü  Following the above tech work, on our test bench, this unit's amplifiers produced 17.5 Volts @ 8 Ω per channel for 38 Watts / channel and 14.5 Volts @ 4 Ω per channel for 52 Watts / channel via discrete, metal cased, TO-3 style output devices at 1kHz. (4x Sankyo 2SC1111).
AC idle current draw measured at 0.2A.
DC offset adjusted to 0 mVDC ±10.
Bias current adjusted to 19mA.
Floor Noise Level tested at 2.5mVAC / -58dBm.

This is the mid line for Sansui's receiver offerings spanning 1974-1976. The Sansui 661 Stereo Receiver. Classic looking brushed-aluminum silver face with brushed dial glass with green, back-lit numerals. Matching, milled aluminum control knobs. This particular one looks near new.

Sansui 661 Features include:

 
- Weighted flywheel analog tuning
- A-B, A+B or Off speaker selector
- Separate Bass and Treble
- Built-in Hi filter for reducing 19kHz pilot tone and 38kHz Harmonic in FM broadcasts, Tape Hiss  and any external processor hiss (don't buy noisy / cheap processors and that won't be a problem in the first place)
- FM muting, separate from FM stereo selector
- Stereo / Mono mode selector for Pre-Amp section
- "Loudness" function to boost Bass and Treble in relationship to Mid frequencies at lower volume levels for a much fuller sound.
- Phono / turntable input
- AUX Input (CD / DVD /DAT / VCR / iPod / MP3 / iPod / XM / SIRUS etc.) input
- Dual "True" tape monitors with Tape 1 sporting RCA and DIN I/O's.  (Tape Monitors can be used with Video / CD / DVD / VCR / DAT / iPod / MP3 / XM / SIRUS CDR (CD recorders as well as for inserting signal processors, such as EQ's, Reverbs, Spatial Enhancers / Dynamic Processors, Noise Reduction units, Special Effects units, Time Delays, etc) Dubbing can be used with CDR (CD recorders) units)
- Tape
dubbing 1 to 2
- VU Signal Strength meter
- 4-Channel Adaptor Loop
- Dual AC convenience outlets on rear panel with 1 switched and 1 un-switched for a total capacity of 250 Watts of accessories
- True “
WORLD AC POWER"

   as it will work on both 50 or 60 Hz AC and voltages from 110-240 Volts AC

 
Sansui 661 Original Specs:
  
"The Sansui 661 has a continuous power output of 25 RMS Watts per channel min. @ 8 Ohms from 20 hertz to 20,000 hertz with no more than 0.5% THD (measured utilizing AUX input)"
 
POWER / PRE AMP SPECIFICATIONS:

THD: 0.5% @ full rated power
Freq Response of power amp section:

@ full rated power 30-20kHz
 Potential frequency response of power amp section @ 1w: 20-40,000Hz ±2dB
 
IMD utilizing AUX: 0.5% @ full rated power / 30-20kHz

TUNER SPECS FOR FM:
Freq Response:
30-15kHz
S/N
: > 60db Mono
Mono RF Sensitivity:
2.2 μV
Capture Ratio:
2.5dB
De-Emphasis: selectable 50/75 μ-sec
THD w/ 100% modulation @ 1kHz, Mono: 
0.5%
THD w/ 100% modulation @ 1kHz, Stereo: 
0.7%
FM Alternate Channel Selectivity: 
60dB wide or narrow

PHONO SECTION SPECS:
Freq Response:
30-20kHz
S/N:
70 dB, ref w/ 10mV input
Input Sensitivity:
2.5 mV @ 50kΩ
Overload limit:
150 mV
 
Again, as stated before, we have completely gone through this unit cleaning and testing all. Driver boards serviced and tuner aligned. Brushed aluminum face and all original, milled knobs in fabulous shape. Wood grained, vinyl wrapped case in great shape as well. The unit looks near NEW! After 7 hours technician / restoration time, receiver performs and sounds great! Includes an 'e' copy, pdf download of the Sansui 661 brochure if purchaser desires. Comes with original box and packing. Measures 17.5" wide x 12" deep x 5.25" high and weighs 22 lbs unpacked. Includes our standard 90 day limited warranty!
SANSUI 661
 
Cond. 8.5++
 $379.
SOLD 3/23/17
SHIPPING TO MONTANA

(C) R.R.


(Above text, in it's entirety, property of www.oaktreevintage.com / Oak Tree Enterprises, LLC. See 'Copyright Information' page for details)

 

 

 

 

   
 

 

 


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Click ........HERE.


 


**
"(actual as measured)" refers to original test results done by Hirsch-Houck Laboratories upon test release of product when new. Current "aged" specifications / performance may of course vary from that.

 

 

 

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