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

VINTAGE / USED AMPS & PRE-AMPS
PHOTO GALLERY
REFERENCE PHOTOS / ARCHIVE SOLD UNITS

 

Reference Photo gallery-archive of vintage / Used Stereo Amplifiers, Pre-amps, & Integrated that we have had in the past that have been sold. Keep checking as more vintage Yamaha Amps will be added periodically. Used vintage Stereo Preamps, power amplifiers, integrated amps, Vintage 1970's Akai, Barney Oliver, Carver AV-705x THX, M / C, Crown IC-150A, Denon POA-4400, Dynaco 120A, PAT 4, EICO HF-20, HF-60, Fisher, Grommes, Harman Kardon / HK Citation Eleven II, Twelve, Hafler DH, Heathkit AA / AP, JVC JA, Leak TL / 12 PLUS AMP "POINT-ONE PLUS" PRE-AMP, McIntosh MA-230, MA-6100, MC-40, MC-240, Mitsubishi DA, NAD 3020, Paramount, Onkyo Integra A-807, M-501, Rauland, SAE Mark IV IX, Sansui AU, QS, Sony TA, Technics SU-V, Toshiba SY. Some of our 'past' listings may have a portion of their original text remaining, but not necessarily intact, and not likely complete as that has been archived for potential future purposes. All photos and text, copyrighted and protected as stated at bottom of page. Click the link below for current inventory.

  TO SEE OUR SELECTION OF CURRENTLY
AVAILABLE STEREO AMPS, PRE-AMPS AND POWER AMPS
CLICK HERE





NEW ADDITION 10/20/07
 
(Click on above thumbnails to enlarge photos)
 CheckMarkSmall_web.jpg (792 bytes) warranty
AKAI
AM-2400 AM2400
STEREO

INTEGRATED AMPLIFIER

Circa 1977-'79
MIJ

SOLD 8/12/08

 

 



   


NEW ADDITION 12/20/10
 (Click on above thumbnails to enlarge photos)
CheckMarkSmall_web.jpg (792 bytes)  warranty
VINTAGE 
AKAI
 STEREO
 
INTEGRATED AMPLIFIER
            AM-2200
AM2200
   #...
0493
 Circa 1977-'79
 MIJ

SOLD 12/20/10

 

 

 
B&K_AV2500_Power_Amp_web.jpg (17933 bytes)

B&K_AV2500_Power_Amp_collage.jpg (167352 bytes)

 (click on above thumbnails to enlarge photos) 
B&K
AV2500
5-CHANNEL
POWER AMPLIFIER

for sale
As-Is for repair
B&K AV2500
MSRP ~$600.00

SOLD

 
Barney_Oliver_Integrated_Amp_Amplifier_web.jpg (27528 bytes)

Barney_Oliver_Integrated_Amp_Amplifier_collage.jpg (167393 bytes)    Barney_Oliver_Integrated_Amp_Amplifier_Internals_collage.jpg (238054 bytes) 
Barney_Oliver_Speaker_Output_Plugs_Jacks_web.jpg (13272 bytes)

BARNEY OLIVER
INTEGRATED AMP

SOLD 11/26/04

 

  

 
Carver_AV-705x_Sal_web.jpg (24376 bytes)

CARVER PREMIERE
AV-705x
THX 
        5-CHANNEL POWER AMPLIFIER

SOLD

 

 

CARVER PRE-AMP / PREAMPLIFIER
C-1 / C1

ON HOLD FOR SHOP USE



 

 
    

     NEW LISTING 6/24/08
 (click on above thumbnails to enlarge photos) 
VINTAGE
 CARVER
                MODEL M-400A
M400A M-400 M400
"CUBE"
      POWER AMPLIFIER
AMP

ONE SIDE OUT 
Circa late 1980-83

SOLD

 for sale

Great project for someone who is versed in repairing and caring for original Carver Cubes, or just needs a decent, single channel power amp. This M-400a has a great sounding left side, but a right side that shuts down at 1.5V output @ 8 ohms. What we know:
Current draw at idle: 
0.6 A
Right channel output:
44.6 volts @ 8 ohms = 248 watts
39.5 volts @ 4 ohms = 390 watts

Left channel output:
1.5 volts @ 8 ohms = .28 watts
(tested into brick-wall load with 1kHz input)
DC output; L = 11.5 mv, R = +9.3 mv
All Front panel LED's function.

Amp has numerous scuffs and scratches including the very obvious one shown on the face. No dents. Functioning right channel sine wave output looks great all the way up to clip!
As-Is

SOLD


 
CarverM-500_web.jpg (8870 bytes)

CARVER M-500
STEREO POWER AMPLIFIER
SOLD

 
 
Crown_IC150A_web.jpg (28697 bytes)

CROWN
IC 150A
STEREO PRE-AMPLIFIER
CIRCA 1977-83
SOLD 

 

 



           NEW LISTING 5/4/12
(Click on above thumbnails to enlarge photos)
CheckMarkSmall_web.jpg (792 bytes)  warranty
PRE-OWNED
CROWN
PS-200
PROFESSIONAL
STEREO POWER AMPLIFIER
CLASS-A / CLASS A-B
#...7317
MADE IN THE USA!

Our technician has completely gone through and 'Certified' this unit. Unit bench checked / tested. Amp has been cleaned inside and out. Attenuators are 'sealed' for your protection and never need cleaning! All functions have been tested and pass with flying colors! Amp designed using Huge, Power Supply Transformer and Massive, very efficient, externally located, vertically oriented heat sinks, for sufficient cooling. This amplifier is in both great electronic and physical shape. Looks NEAR NEW and sounds fantastic! All inputs tested and both side produces clean and even sine waves! No power supply hum of any kind. It's dead silent! Following restoration procedures, we burned it in, in the shop at continuous high volume for 4 hours straight and it functioned flawlessly.

I have owned and sold many Crown power-amps and they are famous for a good reason. Very quiet, solid, reliable and REAL power.  

  
On our test bench, this particular Crown PS-200 power amplifier, #...7317, unit's amplifiers produced 28.4 volts at 8 Ohms per channel for 100 continuous watts, and 27.1 volts @ 4 Ohms for 183 watts / channel discrete TO-3, output transistors. 


 Again, as stated before, our technician has completely refurb'd this Crown PS-200, stereo Power-Amp, cleaning and testing all and it gets our full 'Certification'.  Comes with e-copy / pdf download of the original Crown PS-200  brochure.
 Measures standard 19" 'rack-width' wide x 10.25" depth x 5.35" tall (3-rack spaces) and weighs 25 lbs unpacked. Includes our standard 90 day limited warranty.
CROWN PS-200 POWER AMPLIFIER
 Cond. 8.5
PRE-OWNED
(C) M.R.
SOLD 2-20-13
SHIPPED TO SOUTH CAROLINA

 

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


 

 

 

 

 



         

(Click on above thumbnails to enlarge photos)
PRE-OWNED
CROWN STEREO PRE-AMP
CROWN PSL-2 "STRAIGHT LINE"
MADE IN THE USA!
Circa 1981-92
SOLD

  

 

  

  

             NEW LISTING 10/13/12 
(Click on above thumbnails to enlarge photos)

CheckMarkSmall_web.jpg (792 bytes)  warranty
PRE-OWNED CROWN STEREO PRE-AMPLIFIER
CROWN PSL-2 "STRAIGHT LINE"
#...2351
MADE IN THE USA!
Circa 1981-92

(C) M.R.
SOLD 1/21/13
SHIPPED TO NEW YORK

 

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

 

 

 

     

 

NEW LISTING 12/27/12
(Click on above thumbnails to enlarge photos)

CheckMarkSmall_web.jpg (792 bytes)  warranty
VINTAGE
DENON STEREO INTEGRATED AMPLIFIER
DENON PMA-757
STEREO INTEGRATED AMP

#...0026
Circa 19
84-86
MIJ

SOLD 1/1/13
SHIPPED TO MISSOURI

Our technician has completely gone through and 'Certified' this unit. Following ext / int visual inspection entire unit was cleaned and out including all contacts, switches and controls. Switches now clean sounding and performing solidly. Silicone heat sink pads installed. All nine (9) 'Function Indicator' / Spkr lamps replaced regardless of current condition. Output section bias / DC offset adjusted to spec conditions.
All functions tested for perfect operation. All inputs tested and both side produces clean and even sine waves! No power supply hum of any kind. It's dead silent! Following electronic refurb, entire unit was cosmetically detailed. Great looking brushed aluminum face plate or the original aluminum knobs. Following restoration procedures, the unit was run continuously at medium volume, as all our amplifier / receivers are, into a load with "Loudness" on and both Tone Controls at 10 for 48 hours.

    
While this amp was originally rated at 80 wpc, on our test bench the internal amplifiers of this particular unit, #...0026, produced 29 volts per channel at 8 ohms for 105 watts per channel and 26.6 volts at 4 ohms for 176 watts per channel via discrete, TO-3 outputs (2x 2SB489 & 2x 2SD1110)
 Overall Idle current draw measured @ 350mA. DC offset / out adjusted to and measured at <6mV on either side. Bias set to 10mV.
Very quiet with Floor noise measured at <0.1mVAC.

   
____________________________
   
Great performing and VERY handsome looking Denon PMA-757 Integrated Amplifier. Great unit to...

From the original broch; '
"High Spee
...
Denon PMA-757 Features include:

  

- 'DC' (Direct Co
...(text archived)...


HEY, WHY ALL THE 'X'd' OUT / OMITTED SPECS AND TEXT?

   
Original DENON PMA-757 Specifications:

  
 
  
 
Design type: 2 Chann....(text archived)...

HEY, WHY ALL THE 'X'd' OUT / OMITTED SPECS AND TEXT?

 

Again, as stated before, our technician has completely refurb'd this Denon PMA-757 Stereo Integrated amplifier, cleaning and testing all and it gets our full 'Certification'. All functions test perfectly. Great control / pre-amplifier for just about any stereo system / power amp. This is a fabulous amp. Sonically superb following our techs work. Very musical....Check that 'Slew Rate' above!!! Lots of solid power / punch. Unit looks and sounds great! Includes a pdf 'e' copy download of the Denon PMA-757 Owners / Users Manual. Measures 17" wide x 15.5" deep x 5.5" tall and weighs 26 lbs unpacked. Includes our 90 day limited warranty.
Denon PMA-757 Stereo Integrated amplifier
Condition
9
SOLD 1/1/13
SHIPPED TO MISSOURI

(C) R.R.

 

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

 

Denon_POA-4400_web.jpg (21003 bytes)

CheckMarkSmall_web.jpg (792 bytes)warranty
DENON
POA-4400
MONAURAL POWER
AMPLIFIER
SOLD

 

 

 
  Dynaco120A_web.jpg (27880 bytes)

DYNACO
120 A STEREO POWER AMPLIFIER
SOLD




 
(Click on above thumbnails to enlarge photos)
CheckMarkSmall_web.jpg (792 bytes) warranty
DYNACO
PAT-4
STEREO PRE-AMPLIFIER
MADE IN THE USA!

 Preamp amp
Circa 1967-73
SOLD 9/20/08

 

 

eico_hf_20_fr_nocover.JPG (148538 bytes)

EICO HF-20 TUBE MONO POWER AMP AMPLIFIER
SOLD

 

     


 
(Click on above thumbnails to enlarge photos)
EICO HF-60 HF60 TUBE MONO POWER AMP AMPLIFIER
SOLD 4/20/06

 


    

            NEW ADDITION 7/15/08
 
(Click on above thumbnails to enlarge photos)
CheckMarkSmall_web.jpg (792 bytes)  warranty
EMERSON
STEREO

INTEGRATED AMPLIFIER
A-32 A32

Circa 1977-'79

SOLD 12/4/08

 

 



 

NEW LISTING 4/26/13
(Click on above thumbnails to enlarge photos)
CheckMarkSmall_web.jpg (792 bytes)  warranty
PRE-OWNED FISHER INTEGRATED POWER AMPLIFIER
FISHER CA-276
STEREO INTEGRATED AMPLIFIER

#...8443

Circa late 1980's
MIJ

SOLD 5/23/13
SHIPPED TO CALIFORNIA

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

  Following both internal and external visual inspection, the entire unit was cleaned out including all contacts, switches and controls. Switches now clean sounding and performing solidly. Controls are smooth and silent.

  Silicone heat sink compound inspected for suppleness

  Output section bias / DC offset adjusted to factory spec.

  Solder joints reflowed on all possible high heat and stress points

  All indicators checked

  All functions tested for perfect operation.

  All inputs and functions tested.

  Both amplifier sides produce clean and even sine waves! No power supply hum of any kind. It's dead silent!

  Following electronic refurbishing, the entire unit was cosmetically detailed.

  Great looking with no cosmetic issues and unit looks near NEW.

  Following restoration procedures, the unit was ran continuously at medium volume, as all our amplifier / receivers are, into a load with "Loudness" on and both Tone Controls at 10 for 48 hours.


On our test bench, each internal amplifier of this particular unit, #...8443, produced peak power of 28 volts @ 8Ω per channel for 196 watts / channel and 41 volts @ 4Ω per channel 210 watts / channel via 8 discrete output devices at 1khz. (4X 2SC3182 & 4X 2SA1265). AC Idle current at .35A. DC offset adjusted to <11 mV L&R. Floor noise <0.3 mVAC.
____________________________

(C) R.R.

SOLD 5/23/13
SHIPPED TO CALIFORNIA


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

 

 

   





       NEW ADDITION 4/2/10
 (Click on above thumbnails to enlarge photos)
CheckMarkSmall_web.jpg (792 bytes)  warranty
FISHER

 
VINTAGE
STEREO PRE- AMPLIFIER

 
          CC-3000
 CC3000
 #...0544
 STEREO
 
        PRE-AMPLIFIER
amp
 
 Circa 1980-81 
 MIJ 

SOLD 8/27/10


 

Fisher_TX-1000_web.jpg (22119 bytes)   

Fisher_TX-1000_collage.jpg (148750 bytes)


FISHER TX-1000
INTEGRATED AMPLIFIER

SOLD

 

 

Grommes_10PG-8_web.jpg (26393 bytes)

GROMMES
10PG-8

SOLD
HarmonKardon_hk870_web.jpg (14499 bytes)  HarmonKardon_hk870_collage.jpg (73847 bytes)

HARMAN KARDON
hk 870
POWER AMPLIFIER
Circa '84-'87
SOLD
HarmonKardon_800SeriesSystem_web.jpg (38168 bytes)

HARMAN KARDON
hk SYSTEM
SOLD

 

 

HarmonKardon_hk825_web.jpg (14905 bytes)   HarmonKardon_hk825_collage.jpg (95496 bytes)

HARMAN KARDON
hk 825 STEREO PRE-AMPLIFIER

SOLD 1/1/05
Harman_Kardon_Citation_Eleven_II_Stereo_Pre-Amp_web.jpg (23123 bytes)  

  Harman_Kardon_Citation_Eleven_II_Stereo_Pre-Amp_collage.jpg (173042 bytes)

HARMAN KARDON HK
    CITATION ELEVEN II 
STEREO PRE-AMPLIFIER

SOLD 11/17/03 

 




         NEW ADDITION 11/2/11
 (Click on above thumbnails to enlarge photos)
CheckMarkSmall_web.jpg (792 bytes)  warranty
HARMAN KARDON HK
CITATION ELEVEN / II
STEREO PRE-AMPLIFIER
MADE IN THE USA!
Circa 1973-76

in originally optional wood case!

SOLD 4/5/13
SHIPPED TO MISSOURI

 

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


 

 

 

 
  Harman_Kardon_HK_Citation_12_Twelve_Power_Amplifier_Amp_web.jpg (28458 bytes)

Harman_Kardon_HK_Citation_12_Twelve_Power_Amplifier_Amp_collage.jpg (121847 bytes)    Harman_Kardon_HK_Citation_12_Twelve_Power_Amplifier_Amp_internals_collage.jpg (169480 bytes)


HARMAN KARDON
CITATION
"TWELVE" 12
 POWER AMPLIFIER 
M
SOLD 11/4/04

 

P

HK_Integrated_Amplifier_A402_web.jpg (36155 bytes) 

  HK_Integrated_Amplifier_A402_collage.jpg (206436 bytes)

HARMAN KARDON HK
A-402 STEREO INTEGRATED AMPLIFIER

SOLD


       

          NEW LISTING 8/14/12
(Click on above thumbnails to enlarge photos)
CheckMarkSmall_web.jpg (792 bytes)  warranty
VINTAGE HARMAN KARDON CITATION-16 / SIXTEEN
CLASSIC AND SERIOUS
STEREO POWER AMPLIFIER
CLASS-A / CLASS A-B
#...0147
Circa 1976-79

MADE IN THE USA!

SOLD 2/3/13
SHIPPED TO COLORADO

Our technician has completely gone through and 'Certified' this unit. Unit bench checked, necessary repairs made, cleaning / detailing inside and out, fully tested and Certified. Our technician reset the voltage to correct 120vAC. He then replaced EVERY electrolytic capacitor, including the four 10,000μF filter caps.



He actually 'upped' them to 12,000μF.

Prior to that, the amp did 'function' to a degree that the average 'ear' might no notice any issue with, however it had THE WORST condition capacitors we have ever come across (and we're talking many 'thousands' of units). Even considering we restore gear from the 1940s! The main filter caps had electrolyte so dried up, and so bad, you could actually hear the the crystallized electrolyte 'rattling around' inside when we shook them!!! The amp should have 'smoked' when powered up, but nothing 'drew' alarmingly on the vari-ac, however the amp did have -550mV on one side and -135mV on the other. Again, it still produced sound that the average person might perceive as 'passable'. I say all that to make you aware of the IMPORTANCE of having an amp gone thru, by a qualified technician. Most folks would not have noticed any of the issues until something 'went south' catastrophically.

All 16 original RCA brand, TO-3 output transistors removed, bad or questionable mica insulators replaced and fresh heat-sink compound installed. He also replaced the disintegrated 'plastic' pilot lamp escutcheons / lamp assemblies and changed the neon lamps from 'red' to 'blue'. As stated, the technician also replaced the balance of the electrolytic capacitors which then allowed the amp to be properly adjusted for bias and DC offset. Both main wafer switch wafers cleaned / burnished. LED panel mounting 'shored-up'.
Following above operations, all functions have been tested and pass with flying colors! Amp designed using Huge, TRUE DUAL Power Supply Transformers, with separate filtration, and MASSIVE, very efficient, externally located, vertically oriented heat sinks, for sufficient cooling. This amplifier is in both great electronic and physical shape. While it's not going to win any 'beauty contests' due to numerous, minor 'battle scars', there are no dented / bent corners or heat sinks (a miracle considering it's mass) (see above photos for details). Performs and sounds fantastic! All inputs tested and both side produces clean and even sine waves! No power supply hum of any kind. It's dead silent! Following restoration procedures, we burned it in, in the shop for 48 hours and it functioned flawlessly (we actually took it into our 'demo' system and 'rocked-it' HARD on our Altec VOTT's. HUGE sound and thump).

  
On our test bench, this particular hk Citation 16 power amplifier, #...0147, unit's amplifiers produced 34.5 volts at 8 Ohms per channel for 148 continuous watts, and 30 volts @ 4 Ohms for 225 watts / channel discrete TO-3, output transistors. (16x RCA 0404. (Idle AC current draw @ .6A. & DC offset out = <7mV on either side. Bias set to 9.9mV. Floor noise measured at <0.1mVAC either side)

hk Citation Sixteen Features:

- Completely separa
.....(text archived)...

HEY, WHY ALL THE 'X'd' OUT / OMITTED SPECS AND TEXT?


Harman Kardon Citation Sixteen / 16 Specifications:

- Rated RMS Output: .....(text archived)...

HEY, WHY ALL THE 'X'd' OUT / OMITTED SPECS AND TEXT?


Again, as stated before, we have completely gone through this HK Citation Sixteen / 16, Power Amplifier cleaning and testing all and it gets our full 'Certification'. ....(text archived)...

HEY, WHY ALL THE 'X'd' OUT / OMITTED SPECS AND TEXT?


 Comes with e-copy pdf download of the hk Citation Sixteen / 16 Owners Manual and Technical Manual.
 Measures standard 19" 'rack-width' wide x 14" depth x 9.5" tall (5-rack spaces) and weighs 55 lbs unpacked. Includes our standard 90 day limited warranty.
HARMAN KARDON HK CITATION 16 / SIXTEEN POWER AMPLIFIER
 Cond. 8

SOLD 2/3/13
SHIPPED TO COLORADO

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

 

 

 

   
Harman_Kardon_PA-2100_web.jpg (18103 bytes)

HARMAN KARDON
STEREO POWER AMP PA 2100
 
SOLD

 

 



   

NEW ADDITION 5/19/09
 (Click on above thumbnails to enlarge photos)
CheckMarkSmall_web.jpg (792 bytes)  warranty
HARMAN KARDON / HK
 
 STEREO
  
INTEGRATED AMPLIFIER
  
       
PM660 PM660
 
 #....0622
  
Circa 1980-84

  MIJ 

 
(C)
C.B.S.

SOLD 10/25/09


 
 

 




NEW ADDITION 1/30/08

 
(Click on above thumbnails to enlarge photos)
 CheckMarkSmall_web.jpg (792 bytes) warranty
HAFLER DH-200
#...5074
STEREO POWER AMPLIFIER

SOLD 2/26/08

 

 

Hafler_P-225_Power-Amplifier-Amp_web.jpg     Hafler_P-225_Power-Amplifier-Amp_collage.jpg

         NEW LISTING 3/26/14
(Click on above thumbnails to enlarge photos)
CheckMarkSmall_web.jpg (792 bytes)  warranty
VINTAGE
HAFLER STEREO POWER AMPLIFIER
HAFLER P-225 'PRO AUDIO' AMPLIFIER
OAK TREE VINTAGE'S SPEAKER AUDITION AMP
#...1809
Circa 1984-87
MADE IN U.S.A.

(C) M.R.
SOLD 10/4/14
SHIPPED TO TEXAS

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

 

 

  

 
 
 FOR SALE 
 
   

 

NEW ADDITION 10/15/07
 
(Click on above thumbnails to enlarge photos)
  CheckMarkSmall_web.jpg (792 bytes)  warranty
HEATHKIT
AA-1219 AA1219
STEREO

INTEGRATED AMPLIFIER

SOLD 11/5/07


 




HEATHKIT
AP-1800 AP1800
STEREO
PRE-AMPLIFIER
PRE-AMP
SOLD 9/2/05
 
JVC_JA-S77_Stereo_Integrated_Amp_web.jpg (57990 bytes)

JVC_JA-S77_Stereo_Integrated_Amp_collage.jpg (359929 bytes)

JVC JA-S77
STEREO
INTEGRATED AMPLIFIER AMP

SOLD

 

 

   

FOR SOLD GALLERY OF KENWOOD AMPS / PRE-AMPS, CLICK HERE!

 
Leak_pair_web.jpg (36451 bytes)

LEAK
TL / 12 PLUS TUBE AMP
&
"POINT-ONE PLUS" TUBE PRE-AMP
CIRCA '58

SOLD

 

 



 

        NEW LISTING 4/17/13
(Click on above thumbnails to enlarge photos)
CheckMarkSmall_web.jpg (792 bytes)  warranty
VINTAGE LUXMAN INTEGRATED POWER AMPLIFIER
LUXMAN L-80V  L80V
STEREO INTEGRATED AMPLIFIER
#...1924
Circa 1976-80
MIJ

for sale

SOLD 7/10/13
SHIPPED TO WISCONSIN

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

  Following both internal and external visual inspection, the entire unit was cleaned out including all contacts, switches and controls. Switches now clean sounding and performing solidly. Controls are smooth and silent.

  Output Transistors removed and individually tested for leakage and proper specs

  Silicone heat sink compound was replaced on all output devices upon replacements.

  Output section bias / DC offset adjusted to factory spec.

  Solder joints reflowed on all possible high heat and stress points

  Power/Dial indicator lamp replaced.

  All functions tested for perfect operation.

  All inputs and functions tested.

  Both amplifier sides produce clean and even sine waves! No power supply hum of any kind. It's dead silent!

  Following electronic refurbishing, the entire unit was cosmetically detailed.

  Great looking brushed aluminum face plate or the original tinted aluminum knobs shows no wear and unit looks near NEW.

  Following restoration procedures, the unit was ran continuously at medium volume, as all our amplifier / receivers are, into a load with "Loudness" on and both Tone Controls at 10 for 48 hours.


On our test bench, each internal amplifier of this particular unit, #...1924, produced peak power of 23 volts @ 8Ω per channel for 66 watts / channel and 20 volts @ 4Ω per channel 100 watts / channel via discrete TO-3 metal case output devices at 1khz. (2X 2SC1116A & 2X 2SA747A). AC Idle current at .2A. DC offset adjusted to a SUPER LOW <0.1 mV L&R. Floor noise <0.6 mVAC.
____________________________

LUXMAN L-80V INTEGRATED AMPLIFIER

(C) M.R.
SOLD 7/10/13
SHIPPED TO WISCONSIN



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

 
-
     


FOR SOLD GALLERY OF MARANTZ AMPS / PRE-AMPS, CLICK HERE!

 
     

 
(Click on above thumbnails to enlarge photos)
MCINTOSH
MA230 MA-230
TUBE INTEGRATED AMP AMPLIFIER

SOLD 4/20/06




NEW ADDITION 4/21/08
 
(Click on above thumbnails to enlarge photos)
 CheckMarkSmall_web.jpg (792 bytes) warranty
MCINTOSH
MA-6100 MA6100
#AP2905

STEREO

INTEGRATED PRE AMP / AMPLIFIER
SOLID STATE

SOLD 5/20/08
 


 

Mvc-003f.jpg (42183 bytes)

VINTAGE
MCINTOSH MC-40
TUBE MONO-BLOCK POWER AMPLIFIER

SOLD


NEW ADDITION
6/08
 
(Click on above thumbnails to enlarge photos)
MCINTOSH
240
STEREO

TUBE AMP / AMPLIFIER

SOLD
6/08
 

 

- -
 



      NEW ADDITION 9/11/08
 
(Click on above thumbnails to enlarge photos)
CheckMarkSmall_web.jpg (792 bytes)  warranty
PRE-OWNED  
MITSUBISHI

STEREO

POWER AMPLIFIER
        M-A4370
MA4370
#...7501 
(C)
C.B.S.

SOLD 12/23/10
 


 

Mitsubishi_DA_U155_Stereo_Integrated_Amp_web.jpg (27305 bytes)

NEW ADDITION 2/10/05
MITSUBISHI
DA-U155 
STEREO
INTEGRATED AMPLIFIER
AMP

SOLD 2/11/05
 FOR SALE 
Mitsubishi_DA_U155_Stereo_Integrated_Amp_web.jpg (27305 bytes)

Mitsubishi_DA_U155_Stereo_Integrated_Amp_collage.jpg (246257 bytes)

         NEW ADDITION 4/21/08
 
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 CheckMarkSmall_web.jpg (792 bytes) warranty
MITSUBISHI
 DA-U155 DAU155
 STEREO
 INTEGRATED AMPLIFIER
 AMP
 Circa 1978-'80

SOLD 9/28/08

 


 





NEW ADDITION
6/28/11
(Click on above thumbnails to enlarge photos)
  
warranty
NAD STEREO PRE-AMPLIFIER
NAD 1155

 
Circa 1985-'87
#...9333

MIJ 

(C)
M.R.
SOLD 6/29/11

 

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

 



           NEW LISTING 5/4/12
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CheckMarkSmall_web.jpg (792 bytes)  warranty
VINTAGE
NAD STEREO POWER AMPLIFIER 2150
2-OHMS STABLE!!!
#...6309
   Circa 1982-84
   MIJ

(C) M.R.
SOLD 8/2/13
SHIPPED TO OKLAHOMA

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

 

NAD_3020_Web.jpg (21633 bytes)

NAD 3020
STEREO INTEGRATED AMPLIFIER

SOLD


 




NEW ADDITION 10/15/07

 
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 CheckMarkSmall_web.jpg (792 bytes) warranty
NAD

3020
STEREO

INTEGRATED AMPLIFIER
 (C)
C.B.S.

SOLD 5/14/08

 

 
Nikko_TRM-1200_Integrated_Amp-Amplifier_parts_web.jpg (26558 bytes)
(Click on above thumbnails to enlarge photos)
NIKKO TRM-1200
NIKKO INTEGRATED AMP / AMPLIFIER

SOLD

 
   
ParamountPF-5_web.jpg (18827 bytes)
PARAMOUNT
PF-5
5 CHANNEL AMPLIFIER.
SOLD

 

 

   

 



        NEW LISTING 6/29/12
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CheckMarkSmall_web.jpg (792 bytes)  warranty
VINTAGE
ONKYO STEREO INTEGRATED AMPLIFIER
A-5 / A5
STEREO INTEGRATED AMP

   #...8374
Circa 1977-80

MIJ

SOLD
9/27/12
SHIPPED TO
WISCONSIN
Our technician has completely gone through and 'Certified' this unit. Following ext / int visual inspection entire unit was cleaned and out including all contacts, switches and controls. Balance control potentiometer replaced. Power switch disassembled, cleaned of old 'sticky' lubes and re-lubed. Switches now clean sounding and performing solidly. Bad 2SD427 output transistors replaced, and fresh heat-sink compound applied to all 4 output transistors. Output section bias / DC offset adjusted.
All functions tested for perfect operation. All inputs tested and both side produces clean and even sine waves! No power supply hum of any kind. It's dead silent! Following electronic refurb, entire unit .......


HEY, WHY ALL THE 'X'd' (...) OUT / OMITTED SPECS AND TEXT?


    
While this amp was originally rated at
XX wpc, on our test bench the internal amplifiers of this particular unit, #...8374, produced XX volts per channel at 8 ohms for XXwatts per channel and XX volts at 4 ohms for XX watts per channel via discrete, TO-3, metal cased outputs (2x Toshiba 2SB557 & 2x 2SD427)
 Idle current draw  
XXA.
DC out measured at <
XXmV on either side.
Very quiet with Floor noise measured at
XXmVAC.

HEY, WHY ALL THE 'X'd' (...) OUT / OMITTED SPECS AND TEXT?


   
____________________________
   
Original Onkyo A-5 Specifications:

  
 
  
 Design type: XX
POWER AMP SECTION:
  Freq Response of power amp section;
 
XXkHz
  Damping factor;
XX @ 8Ω full bandwidth
 Signal / Noise;
XXdB
 Cont rated Power:
 2x
XX watts @ 8 Ohms / 1kHz
2x
XX watts @ 4 Ohms / 1kHz
 Dynamic rated Power: @
XX% THD = 2 x XX watts / channel / 4 Ohms or XX Wpc @ 8 Ohms

OR @ XX% THD =
XX watts / channel / 4 Ohms or XX Wpc @ 8 Ohms
  THD;
XX% @ XXWatts & 8 Ohms from 20-20kHz,&  @ XX Watts & 4 Ohms
@ 1W output THD & IMD =
XX%
Input Imp:
XXk
Rated Input: ....(text archived)...


HEY, WHY ALL THE 'X'd' OUT / OMITTED SPECS AND TEXT?



PRE-AMP SECTION:
 
   Signal / Noise;  XXdB @ Tuner / Tape 'shorted'
 
   Input Sensitivity Tuner / Tape @ RCA's; XXmV @ XX
  Freq Response of 'Tape or Tuner';
XXkHz
THD; XX% at rated ouput
 
   Bass Control;  XXdB @ XXhz
 
   Treble Control;  XXdB @ XXkhz
Subsonic
Filter; XXHz & XdB/Oct
 
   Loudness Control; XXdB @ XXHz & XXdB @ XXkHz(XXdB VOL)
MutingXXXdB

PHONO SECTION SPECS;
   Freq Response;
XXXXkHz XXdB
 
  S/N; >XXdB!!!, IHF-A
    Input Sensitivity; XXmV @ 50kΩ
   Overload limit; XXmV @ 1k w/ X...
.(text archived)...


HEY, WHY ALL THE 'X'd' OUT / OMITTED SPECS AND TEXT?


 

Again, as stated before, our technician has completely refurb'd this Onkyo A-5 Stereo Integrated amplifier, cleaning and testing all and it gets our full 'Certification'.....
.....
Can include a pdf 'e' copy of the Onkyo A-5 Service Manual if the new owner so desires.....
......
Includes our 90 day limited warranty.
Onkyo A-5 Stereo Integrated amplifier
Condition 8.5
SOLD 9/27/12
SHIPPED TO
WISCONSIN

 

(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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CheckMarkSmall_web.jpg (792 bytes) warranty
ONKYO INTEGRA
A-807 A807
       STEREO INTEGRATED
           
AMPLIFIER
AMP

SOLD 9/26/07

 

 





NEW ADDITION
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CheckMarkSmall_web.jpg (792 bytes)warranty
ONKYO
M-501 / M501
STEREO
     POWER AMPLIFIER
AMP
SOLD 12/30/05

 
 

Onkyo_P306RS_Pre-amp_temp.jpg 

 

NEW LISTING 1/10/14  
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CheckMarkSmall_web.jpg (792 bytes)  warranty
PRE-OWNED  
ONKYO
P-306RS / ONKYO STEREO PRE AMPLIFIER
'Military / Euro-Asia' Market Unit 
Circa 1980-85
"WORLD AC POWER"
MIJ

(C) M.R.

SOLD 7/2/14
SHIPPED TO HOUSTON

 

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




         NEW ADDITION 6/16/09
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CheckMarkSmall_web.jpg (792 bytes)  warranty
  ONKYO
 
 STEREO
STEREO PRE- AMPLIFIER

  
        P-3200
P3200
 
 #...0289
  
Circa 19
90-91
 
 MIJ 

SOLD 10/23/09

 

  
 



FOR SOLD GALLERY OF PIONEER AMPS / PRE-AMPS, CLICK HERE!


 




        NEW ADDITION 6/16/09
 
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 CheckMarkSmall_web.jpg (792 bytes) warranty
PROTON

 STEREO
       POWER AMPLIFIER
AMP
     
D-1200 D1200
  Circa 1986-90
 (C)
C.B.S.

SOLD 7/21/09

 

 

   
Rauland1805A_web.jpg (44808 bytes)

RAULAND
MODEL 1805A
TUBE AMPLIFIER
#39153
CIRCA 1953-54
NOS (NEW OLD STOCK)
UNUSED IN ORIG BOX.

SOLD

 

 

-  
SAE_Stereo_Power-Amp_Mark-4CM-Four_web.jpg (51946 bytes)

SAE_Stereo_Power-Amp_Mark-4CM-Four_collage.jpg (309174 bytes)   SAE_Stereo_Pre-Power-Amp_combo_web.jpg (86606 bytes)


SAE
MARK IV "FOUR" CM IVCM
STEREO POWER AMPLIFIER

SOLD 9/1/05
SAE_Stereo_Pre-amp_Mark-IX-Nine-9_web.jpg (96499 bytes)

SAE_Stereo_Pre-amp_Mark-IX-Nine-9_collage.jpg (518899 bytes)      SAE_Stereo_Pre-Power-Amp_combo_web.jpg (86606 bytes)

 
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CheckMarkSmall_web.jpg (792 bytes) warranty
SAE
MARK IX "NINE" 
STEREO PRE-AMPLIFIER
MADE IN THE USA!
 Preamp amp
Circa 1973-74

SOLD 9/23/08

 

 

 

Sansui A-707 Integrated Amp small photo   

     

NEW ADDITION 5/19/09
 
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CheckMarkSmall_web.jpg (792 bytes)  warranty
  SANSUI
 
 VINTAGE STEREO
  
INTEGRATED AMPLIFIER
  
   
A-707 A707
 
 #...9130
  
Circa ~19
82-85
  
"WORLD AC POWER"

 
 MIJ 

 (C)
C.B.S.
SOLD 04/09/10

 

   
Sansui_AU-317_Integrated_Amplifier_web.jpg (21019 bytes)

Sansui_AU-317_Integrated_Amplifier_collage.jpg (223049 bytes)

SANSUI AU-317 
STEREO INTEGRATED AMPLIFIER

SOLD
Sansui_AU-555_Stereo_Receiver_Amplifier_web.jpg (38444 bytes)   Sansui_AU-555_Stereo_Receiver_Amplifier_collage.jpg (193527 bytes)

SANSUI
AU-555
STEREO
INTEGRATED AMPLIFIER
SOLD
Sansui_AU-555A_Stereo_Integrated_Amp_web.jpg (67503 bytes)

Sansui_AU-555A_Stereo_Integrated_Amp_collage.jpg (310492 bytes)   Sansui_AU-555A_cabinet issues.jpg (79059 bytes)

SANSUI AU-555A
STEREO
INTEGRATED AMPLIFIER AMP

SOLD 3/9/05

 Preamp amp


 

Sansui_C-77_web.jpg (18314 bytes) 

  Sansui_C-77_collage.jpg (115324 bytes)

SANSUI C-77
PRE- AMPLIFIER

SOLD
-



 
 
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CheckMarkSmall_web.jpg (792 bytes) warranty

SANSUI
QS-500
QUAD
DECODER /
QUADRAPHONIC REAR CHANNEL STEREO

     INTEGRATED AMPLIFIER
AMP
*"WORLD AC POWER"
MADE IN JAPAN!
Circa likely 1972-'74

SOLD 8/4/08

 



 



           NEW ADDITION 12/18/09
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CheckMarkSmall_web.jpg (792 bytes)  warranty
SCOTT

  
VINTAGE
 STEREO
  INTEGRATED AMPLIFIER
       A-457
A457
  AMP
#...0860

  Circa 1977-'79

SOLD 5/13/10

 

   




            NEW ADDITION 1/13/08
 
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CheckMarkSmall_web.jpg (792 bytes)  warranty
SHARP
STEREO

POWER AMPLIFIER
SM-7700CD
#...5303

SOLD 5/8/09

 

   




NEW LISTING 11/09/05

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CheckMarkSmall_web.jpg (792 bytes)warranty
SONY
TA-1010
STEREO
INTEGRATED AMPLIFIER

SOLD 1/3/06
 




 
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CheckMarkSmall_web.jpg (792 bytes) warranty

SONY
                   TA-AX390
TAAX390
 STEREO
 INTEGRATED AMPLIFIER

SOLD 11/8/07

 

 

    

 
(Click on above thumbnails to enlarge photos)  
SOUNDSTREAM
SOUND STEAM
SIGNAL PROCESSOR

   C-2 C2
PRE-AMP
DOLBY / THX
Circa 1993
Made in USA

SOLD 9/22/09


 
  

TECHNICS
SU-7300 SU7300
STEREO
INTEGRATED AMPLIFIER

SOLD 8/17/05


NEW ADDITION 10/24/08
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CheckMarkSmall_web.jpg (792 bytes)  warranty
 
TECHNICS
 STEREO
 INTEGRATED AMPLIFIER

         SU-8055
SU8055
 #E021
 Circa 19
79-80
  
"WORLD AC POWER"
 MIJ 

SOLD 12/3/08

 

 

 
Technics_SU-V9_SUV9_Integrated_Stereo_Amp_Amplifier_web.JPG (89496 bytes)  

  Technics_SU-V9_SUV9_Integrated_Stereo_Amp_Amplifier_collage.JPG (241041 bytes)

TECHNICS
SU-V9 SUV9
INTEGRATED AMPLIFIER

SOLD 12/30/03
TechnicsSU-G90_web.jpg (32279 bytes)

Technics
SU-G90
INTEGRATED AMPLIFIER

SOLD
 

   


NEW ADDITION 4/22/08
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 CheckMarkSmall_web.jpg (792 bytes) warranty
TECHNICS

SU-V303 SUV303
#A015

STEREO

INTEGRATED AMPLIFIER

SOLD 5/8/08

 

 





NEW ADDITION 10/20/07
 
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 CheckMarkSmall_web.jpg (792 bytes) warranty
TOSHIBA
SY-335 SY335
STEREO

       PRE-AMPLIFIER
AMP

SOLD 1/2/08



 
   
     


FOR SOLD GALLERY OF YAMAHA AMPS / PRE-AMPS, CLICK HERE!


 
     

TO SEE OUR SELECTION OF CURRENTLY
AVAILABLE STEREO AMPS, PRE-AMPS AND POWER AMPS
CLICK HERE

 
  -  


 


 

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POLICIES, SPECIFICATIONS, AVAILABILITY, INFORMATION
AND PRICING SUBJECT TO CHANGE  AT ANYTIME  AND
WITHOUT PRIOR
NOTICE
and changes may not be posted to web immediately
.
 

20-30% restock fee / service charge applies to all returns for refund depending on item specifics & / or individual distributor / drop shipper policies.
See our "
Warranties / Returns" page via the link below for more details.

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