Audio Proz Service and Sales

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Amplifiers
( 263 Amplifiers sorted by Price High to Low.)
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Yamaha AX-700u
# 73038
Black face, CD tuner, Aux Aux tape 1/2, DAT input, 110W per channel, External Processor Loop Send/Receive, Very high quality design, High quality low noise phono, Variable Loudness, Nice EQ, Nice Reliable design, Minor board re-soldering, All serviced & cleaned, Modified speaker relay, Mute switch is by design a little stickier.
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Crown XLS 2500
# 61479
RCA ins don't work, all else functions OK, low use, #8 condition
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Yamaha M-35
# 63511
2/4 Channel power amp. 35 watts per channel. Left and Right speaker output level controls. Fully serviced, low use, refurbished relays. #8+ condition
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Technics SU-G90
# 63287
Stereo integrated amp, 90 watts per channel, Black face plate, Big volume knob. Phono, Tuner, Tape, TV, and DAT inputs. Prefer to sell with Tuner Technics ST-K50 INV#43678 (will discount price). Speaker B switch interrupts speaker A. Fully serviced, Low use time, needs power cable. #9 condition
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Luxman L-3
# 71696
Integrated Amp, Silver face, Champagne body and Knobs, has 1 phono, 1 tuner, 1 aux, 2 tape loops, low noise/better thermal stable differential transistors for amplifier board, RFI suppressor on phono in and other jacks. All cleaned and serviced, minor P. S. Ground change for improved lower noise, #9 Condition
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Email us at sales@audioproz.com or call (617) 926-8020 for more information about ADA modifications and repairs.
Scott LK-72 Stereomaster
# 43319
Power amplifier. This unit has a bad tube and a bad fuse holder, otherwise a good machine for parts or hobbyist use. Contact us for more information.
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Bryston Stereo Amp 4B
# 43836
This unit can definitely be made functional, but it has some aged resistors that should be replaced. Please contact us for more information.
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QSC RMX-1850HD
# 43847
2 channels, banana speaker connectors, 1/4" and XLR inputs, 15amp breaker. With AC cord, manual, original box. #9 condition with minor light scratches on top paint. Very low use.
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QSC RMX1850HD
# 61450
2-Channel full-featured stereo power Amplifier; includes level controls, EQ and limiter switches on back panel, Speak-On cables, and banana plugs. Extremely low use amplifier (occasional rental)
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Yamaha DSP-A2070
# 52491
Digital sound field processing amplifier. 5 channel Dolby Pro Logic DSP with jazz, concert hall, theater, church, and rock presets. Aux, VCR 1/2/3, TV, tape, tuner, CD, and phono inputs and composite and s-video video inputs. Excellent #9 condition, low use time, cleaned and serviced with ruggedized power supply soldering.
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Harman Kardon Citation 2
# 52538
Stereophonic high fidelity power amplifier. All tube outputs: (4) KT-88 (2 per channel); (6) 12BY7A (3 per channel); 1 Voltage, 2 drivers. 4, 8 and 16 ohm taps; adjustable a/c balance; adjustable bias with meter. Set up for Buggera tubes. All sockets are clean and tight. Fully calibrated, #8 condition cosmetically, #9 condition internally.
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Marantz 1030
# 52807
Stereo amplifier. Mic, phono, tape, tuner, aux selection. Bass and treble controls. Loudness, tape monitor, mono select. Low use, unit has seen minor water damage on top, but performance has not been affected. Set bias/DC connector. Replaced various low level audio capacitors with higher quality mylar. #8+
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Rotel RB-1080 Power Amplifier
# 73778
Excellent, super high-quality Rotel design . Dual power supply. Center-point grounding design. 150-200w per channel. Unbalanced + Balanced inputs for both R/L channels with balanced/unbalanced selector. Cosmetically excellent, only minor signs of wear/use. Fully functional unit, bench tested All inputs are clean & good, both channels perform correctly to spec.(with original box & packaging) Condition: 8+
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Sansui AU-G77X
# 55363
Integrated amplifier; disc, tuner, tape 1, tape 2, aux inputs, MM, MC, CD disc selector, 5 band equalizer, high/low filter, loudness, headphone out, A, B, A+B speaker select, REC selector. 9 condition.
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APT 1 Amp
# 73754
Apt Power Amplifier. SN: 7916152. Later version build. Level III update. low use time, From shop owners personal collection. Very little signs of wear or aging. Some light scratches on face and top panel but no broken or damaged parts. Fully functional unit with Audio Pro updates. #9 condition
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Re: International Shipping: We ship internationally often and have yet to encounter a problem or complaint. We are very careful to test the equipment before it’s packed and then to double box the machine with added protection when needed for front panels, etc. We are not amateurs or an ebay store; we know these machines very well and know what it takes to get them to you safely. We use USPS priority internationally which seems to be the cheapest. If you prefer another carrier (you should know who delivers to your area reliably) please let us know. Also please be aware of any tariffs that you may be responsible for upon pick up on your end. International shipping may be expensive but we will make sure it is not a headache on top of the cost. PLEASE NOTE THAT SHIPPING INTERNATIONALLY WILL BE A MINIMUM OF $24 EVEN FOR SMALL PARTS.
Yamaha CA-600
# 56134
Natural sound stereo amplifier. Silverface with wood cabinet. 1/4" phones jack on face. Slight bend in rear plate at "B" speaker terminals. Fully serviced and calibrated. Has original box. Low hours use. 9/10 condition.
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Pioneer SA-9100 Integrated Amp
# 70158
2 phono in, Multi-band tone controls, Truly one of the best vintage designs, One of the best condition units we have seen, Capacitors in this unit have seen very low use time (no off-spec caps), Low noise headphone, Minor ground mods, Upgraded tone control/EQ transistor, Low noise, Low use, Cleaned and calibrated, Condition #9 (see our listing TX-9100 AM FM Tuner #70152)
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Kenwood KA-3500 Integrated Stereo Amplifier
# 56861
Silver brushed aluminum face with 1/4" headphone jack. Inputs: Phono/Tuner/AUX; A/B tape monitor with dubbing switch. This unit has seen low use and has been fully serviced. There is a minor scuff on the top cover but otherwise cosmetics are excellent, and lettering is perfect. Condition: 9-
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Yamaha A-520
# 70916
Integrated amplifier (1985 vintage) Black face panel. 75 watts per channel. Audiophile grade amp and parts. Has external RCA outs! Speakers A/B Bass Treble + Balance controls. Inputs: Tape 1, 2, Aux, Tuner, CD, Phono w/ switchable mm/mc. Variable loudness. Resoldered grounds + cleaned controls and switches. Good condition all clean. Super quality amp! #9 condition.
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Yamaha G50 112II
# 63046
Guitar amplifier, w/distortion control mods, spring reverb, 3 band EQ, 2 ch, foot pedal (reverb, ch, EQ) Amp comes with vinyl cover(Black) Cleaned and serviced. Unit plays loud, Jazz tone, high quality and bright sounding! #9 Very Nice condition
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Yamaha M-40
# 57602
Power Amp 3 speaker switching. Lubed/cleaned speaker inputs. Cleaned and dusted internal units. #9 Condition (Low use).
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QSC MX700
# 57614
Stereo Amplifier 20k balanced. 2 rack space. Banana outputs 6nd stripe 1/4" input TRS/TS. #7 Condition. Chassis obvious roadwear. Internal very low use.
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Optonica SM-4545
# 63539
Top Quality Design, separate board modules 60-80 Watt per channel, full feature 3 speaker switch. Variable tone switch equalization , Silver face " Pioneer look" 2 tapes, aux, turner in, 2 phonos. Unit has been Audio pro modified with all boards, byPass power supply caps and corrected low noise ground. 9+ low use, Stunning the best !
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Phase linear 200 solid state amplifier
# 62242
Meter range 0db/-10db, velocity feedback rear panel switches. LED front panel peak responding meters for channels A, B. Cleaned, tested resoldered on 1/17/18. 1 speaker jack tab replaced. Faceplate, cosmetics look great, LED meters fully functional, unit has seen very low use, good condition. Faceplate snapped off from interior plastic braces, glued, repaired, looks good. #9 (original box and packing)
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Fender LTB
# 59155
4 channel PA amp. 1/4" and XLR inputs, no phantom power, spring reverb, max 80W. Discrete amp circuit, very serviceable. 9/10 condition. Ruggedized board soldering and cleaned.
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Need an APT unit serviced or modified? Vince, the owner of Audio Pro, ran the production line at APT for many years, and has decades of experience working with APT products. Read all about our APT Holman service and mods here. Also read about the APT Moving Coil Phono Mod Here
APT Power Amplifier 1
# 71498
High quality basic power amplifier done correctly. Features Audio Pro Level III Update. Upgraded - all Power Supply caps, all audio caps, new relay, updated DC servo circuit and relay timer circuit . Very low use unit. Has later version Rev 4 board. #9 condition
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NAD Stereo Amplifier 3130
# 61711
A,B,A+B, speaker settings, Bass, Treble controls, CD, Phono, Tuner, Video/Tape 2 inputs. Better upgrade to many capacitors, and ruggedized board solder. Unit has original transistors, good quality power supply capacitors, nice condition, clean faceplate. #9 condition
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Luxman L480
# 60446
Integrated amp. Unit has 2 tape source inputs. 2 dubbing inputs, 60 watts per channel, has moving magnet and moving coil cartridge inputs. Nice rosewood case. Tuner and auxiliary inputs. Pre amp in/out amp loop. Nice silver slimeline face. All switches and controls cleaned, updated speaker relay. #9+ condition.
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Cambridge audio A300
# 60459
No phono in. Aux CD, Tuner, Aux. Nice Basic design. Black. Clean & calibrate. With box, #9 condition.
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Phase Linear PL 400
# 70942
Vintage power amp. Large VU meters (All lamps functional) Silver face plate. 200 watts/channel. Unit is virtually mint and low use. Serviced resoldered and ruggedized ground + main board. Excellent condition! Low Use! 9+ condition.
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