Audio Proz Service and Sales


Scott 299c Amplifier

Audio Proz Inv #: 27708

H.H. Scott 299c Amplifier. Mostly fresh tubes, Lots of P.S. updates, decent cosmetics, (no dents, minor scratchin at edge of faceplate, all lettering intact)

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Sansui AU-G77X

Audio Proz Inv #: 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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Rotel RA-820 BX

Audio Proz Inv #: 40883

Integrated Amp, 40 watts channel, Slim line design, Tape/tuner/CD/Phones, high quality phono preamp, Note: headphones do not disconnect main speaker outputs when in use, Cosmetically slightly worn (lettering): 7 out of 10, Electrically excellent: 9 out of 10

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Yamaha M-40

Audio Proz Inv #: 57602

Power Amp 3 speaker switching. Lubed/cleaned speaker inputs. Cleaned and dusted internal units. #9 Condition (Low use).

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Crown D150

Audio Proz Inv #: 27050

Older version all repaired updates done fresh capacitors in audio circuits and power supply. Unit has cosmetic damage on side of face plate, no rack ears, excellent performing condition

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If you are having trouble finding parts, enter the name into our search bar at the top of the page. Please be aware there is a minimum $4-$6 to ship any part. International orders will be $14-$16 to ship for anything larger than an envelope. Shipping costs are non negotiable, so please, PLEASE do not ask for a part, or for us to search for, or quantify a part if you cannot pay for the shipping.


Parasound HCA-1200

Audio Proz Inv #: 28849

200W per ch., excellent relay protection circuit, modified to improve heat stability and ground loop problems.

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Harman Kardon Citation 22

Audio Proz Inv #: 27014

Super quality amplifier, dual power supply, dual mono amplifier design, "esoteric" build quality and fidelity, low use hours and purchased from customer who only used as a spare. Serviced and cleaned, and ruggedized solder points on board, small dent on back corner, otherwise excellent cosmetic and mechanical condition. $1150 retail price.

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Kenwood KA-3500 Integrated Stereo Amplifier

Audio Proz Inv #: 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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Onkyo M-501

Audio Proz Inv #: 57801

Basic, well designed. Like Adcom, Rotel, Audiophile. #9.

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Rotel RB-980BX

Audio Proz Inv #: 41697

Stereo power amplifier. Soft limiting, bias set/calibrated, all board soldering touched up, switches all cleaned. 80 watts per channel at 8ohms, straight amp.

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Pioneer SR-303

Audio Proz Inv #: 17246

Stereo reverb amp, blue "tunnel" display window

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We are presently operating on an APPOINTMENT ONLY basis. Please call us first at (617) 926-8020 to schedule an appointment before you come into the shop for repairs, rentals, product recommendations, consultations, or anything other than minor purchases.


Marantz Model 1070

Audio Proz Inv #: 41902

3 band graphic eq, 2 speaker out, preamp in/out. With new speaker relay, input transistors, 2x switch clean/flush, double-up power switching, 2 tape, 1 aux, tuner, phono and mic inputs. Beautiful craftsmanship with timeless design qualities. #9 condition.

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Pioneer SA-7800 Stereo Amplifier

Audio Proz Inv #: 42941

Phono, tuner, aux, high quality phono inputs. With balance, bass, treble controls. 2 tape monitor. Front panel also has muting, loudness, subsonic filter and tone switches. 65 watts per channel with 2 independent speaker switches. All controls and switches, set bias and dc offset, resoldered circuit board where required. #9+ condition.

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Accuphase E-202

Audio Proz Inv #: 42472

5 stereo inputs and full analog metering with selectable range. 3 stereo speaker outs, controls for bass, treble, compression, low enhancement, low and high filters, headphone output, stereo surround switching. basic updates to capacitors have been done. Very good #8 condition, professionally cleaned, calibrated, and tested.

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Denon POA-2400

Audio Proz Inv #: 43673

Dual mono design. 150watt/channel, 250watt peak power. 2 speaker switch. High quality relay. Excellent #9 condition, very low use. Professionally cleaned and serviced with some board resoldering.

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QSC RMX-1850HD

Audio Proz Inv #: 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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Scott LK-72 Stereomaster

Audio Proz Inv #: 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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APT 1 Amplifier Upgrades and Repairs Technical Information: Read more about it here.


Bryston Stereo Amp 4B

Audio Proz Inv #: 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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Cambridge Audio Azur 340A

Audio Proz Inv #: 44472

Integrated amplifier with remote. RCA ins for aux, CD, tuner, DVD, and AV/MD. Tape monitor loop, bass and treble tone controls, two speaker sets, and balance control. Excellent #9 condition with very minor scratches on cover.

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QSC MX700

Audio Proz Inv #: 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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Technics SU-G90

Audio Proz Inv #: 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 L480

Audio Proz Inv #: 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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Sumo 310 Polaris

Audio Proz Inv #: 20678

100 Watt per channel class A/B power amp, High quality high-current mosfet amp, runs true class A up to about 20 watts, very good condition black rack mount.

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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 $16 EVEN FOR SMALL PARTS.


Mcintosh MC 2105

Audio Proz Inv #: 60607

Solid state power Amplifier. SN: AH4175. Luxury style power level meters (DB) for L+R channels, Stereo gain control and intuitive meter range selector. Fully serviced and tested, cleaned all controls/jacks 2 times. Replaced 2 low level transistors on preamp board for level controls. Cleaned board connectors. RCAs have typical oxidized look but function well. Unit specs out phenomenally, very low use time, noticeable crack on one corner of the faceplate, 1 inch in size. With all original box, packing, owners manual, factory harmonic distortion test graph. Cabinet can be made available. #8 condition

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Luxman 5M521

Audio Proz Inv #: 24128

Silver face beautiful design Large Meters, audiophile quality unit, was $1500 in 1980, 200W/ch @ 4 OHM, 100 @ 8 OHM Part of matching 3-piece set. Also included are Luxman 5C50 Preamp (see preamps), and Luxman 5T50 Tuner (see receivers)... **SPECIAL WHOLE SYSTEM SALE**

All our machines have been serviced in our shop to be guaranteed functioning and reliable well into the future. They are sold with service logs explaining the work performed on each individual unit. It is important to hold onto these service logs as they will provide valuable information to any tech servicing the machine in the future.

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