Audio Proz Service and Sales


Gli Model A-6300

Audio Proz Inv #: 50534

High current control 200 Watt, audiophile mostly discreet circuit design, super low noise, high quality amp 115/230 volt operation, audiophile tone control operation, REV 3 MOD, with remote and instruction manual, #10 New unit

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Revox B-750 parts unit

Audio Proz Inv #: 50741

Integrated amplifier, 2 tape inputs, 2 headphones, Bass/presence/treble controls aux in/ tuner/ 2 phono inputs (phono/impedance loading with phono sensitivity switch). Unit has seen very minor water damage; 1 channel is out, face plate and knobs very good condition (missing loudness switch cap), case is rough-missing front fold down panel. Unit is good for boards knobs, one amp channel. *cleaned and lubed*

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ART SLA-1

Audio Proz Inv #: 55590

Single Rack Studio Linear Amplifier. 100 Watts x2 @ 8 ohm. 260 Watt bridged mono. XLR and 1/4 ins, Banana outs. Silent thermal dependent cooling system. Modified low noise fan, optimized bias. Minor rack mount rash. Condition: 8+

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Pioneer SA-9100

Audio Proz Inv #: 51425

Integrated amplifier with three speaker outputs, two tape inputs, two phono inputs, two aux inputs, mic input, and tuner. Two position low/hi filter, three position level switch. All original and very low use time, carefully cleaned and serviced.

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Audio Source Amp 100

Audio Proz Inv #: 51311

Auto input sensing of 2 inputs line out slim line NEW

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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.


Kenwood KA-6000

Audio Proz Inv #: 51548

Late 1970s "single ended transistor" design, creates a "tubeaphonic" sound quality. Very good cosmetic condition with minor scuffs on wood and two light bezel caps missing from front. Excellent mechanical/electronic condition, tone controls replaced with higher quality Alps controls, all cleaned, carefully calibrated, all lights working.

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Akai AM 2400 Integrated Amplifier

Audio Proz Inv #: 61339

Great basic design. Wooden case walnut simulated. Variable turnover. Bass 400/200 hz/ Treble 2.5 khz/5khz. Hi/low filters, muting. 2 tape inputs/dubbing. Phono tuner aux. New relay/power supply updates/new caps on front end. Missing handles w/shadow on front. #7 

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Yamaha DSP-A2070

Audio Proz Inv #: 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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Knight Basic KB-85 60 W Stereo Tube Amp

Audio Proz Inv #: 55385

All original rare vintage tube amp, in excellent working and cosmetic condition. Has high quality JAN spec GL6/5881 tubes.

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Harman Kardon Citation 2

Audio Proz Inv #: 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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NAD S-200

Audio Proz Inv #: 52334

Stereo power amplifier, 200 watts per channel. Nice aluminum face, wow! XLR and RCA inputs. Excellent #9 condition, completely cleaned, serviced, tested with improved internal grounding.

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APT 1 Amplifier Upgrades and Repairs Technical Information: Read more about it here.


Yamaha CA-600

Audio Proz Inv #: 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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Fisher TX-50

Audio Proz Inv #: 56407

Integrated amp. Unit is totally intact. One channel has shorted output transistor & bad emitter resistor (nothing burned or any obvious problem, probably an easy repair). Face plate and connector all in excellent condition. Unit could be easily converted to class A preamp transistor.

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Luxman M-12

Audio Proz Inv #: 57554

DC Stereo Power amplifier. Level controls. Replaced fuse holder. Unit was used by shop. Nice condition. Modest but almost daily use for over 10 years. Updated minor improved value resistors. Rework amp differential. Input amp resolder. Condition #8+

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Hafler P-225

Audio Proz Inv #: 57707

Pro version DH 220 amp with level controls. XLR inputs, ground lift. Later version amp with high quality parts. Quasi Class A design, Mosfet output transistor. Minor scuffs on edges, spray paint top black. Unit has seen low time in consumer studio. condition #8-

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Adcom GFA-535 II

Audio Proz Inv #: 63178

Top quality audiophile design dual power supply. 60 watts per channel. Slim line black, calibrarate test ok, low use #9 condition

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GK MB112II

Audio Proz Inv #: 61061

Bass/keyboard amp, 1x12" speaker. Treble/hi-mid/low-mid/bass EQ. Contour switch, headphone jack, XLR direct out. Custom dampened chassis. Nice condition, very minor marks in a few spots, but nothing major, looks and sounds good. (If requested cab port can be dampened for an even tighter low end) #9 condition

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We offer expert time-saving advice on repairing many types of home and studio equipment, as well as consulting for product and recording issues, at a fair and reasonable cost.  For complex matters, we sometimes must charge a small technical fee.  If we can help solve your repair problem or technical conundrum, give us a call.  (617)926-8020.


Alesis RA-100 100 watt amplifier

Audio Proz Inv #: 58602

Basic design. Audiophile quality. Level control. Basic mods to reduce RFI and hum noise in audio. 8/10 condition (minor cover scratches). With Box.

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Peavey Classic 20

Audio Proz Inv #: 58718

8" Speaker. All tube design. Unit has an easy to overdrive sound character. Tweed cover/skin. Nice for solo lead guitar! 8/10 condition overall. Circuitry in #9 condition. Tweed in #7 condition.

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Phase Linear PL 400

Audio Proz Inv #: 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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Fender LTB

Audio Proz Inv #: 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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Marantz PM7200

Audio Proz Inv #: 59594

Stereo integrated amp with remote. CD/ tuner/ Aux 1/2, phono, 2 tape loops, 1 processor loop, speaker pairs 1&2. 9+/10 condition, did ruggedize board solder, calibration, low use! In box with main packing. Black face, very clean ergonomics.

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Dynakit Stereo 70

Audio Proz Inv #: 61109

With nice condition cage. It is a functional machine with very low use. Cheaper but good, functioning tubes for outputs (Sylvania EL34) with one spare high quality AR4 rectifier (new). *Rough cosmetic condition. Rusty chassis and transformer. Unit needs a serious clean up of cosmetics. Stereo switch removed. Tube sockets good & tight. Both channels work. Full power check ok, operates well. Requires final bias set up, maybe some resolder work. SOLD AS IS. #7- condition.

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We are a very different kind of shop. To help ensure a smoother experience please read our letter about our current shop policies.

We keep our database up to date with almost 10,000 items in stock. If you see a part number and a price, we have that item in stock. 

Customers outside of the US, please note that international shipping can be costly (US Post $16 minimum - up to 8oz or 226g). We are glad to combine orders to reduce shipping costs. Take a look at our shipping policies for more information and estimates of prices and shipping time.


Yamaha CA-1000

Audio Proz Inv #: 60862

Natural Sound Stereo Amplifier. Normal/Hi/Lo filters, bass, treble, balance, tape, monitor, headphones jack. Speaker switches - A, B, C, A+B, A+C. Inputs - Aux 1, 2, tuner, phono 1, 2, mic. Low use, nice face & cabinet. All maintenance performed. Modified to defeat internal Class A switch, which is a weak design problem that must be corrected. #8+ condition.

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Marantz 1060

Audio Proz Inv #: 61034

Integrated stereo amplifier, 2 speaker selection, hi/lo filter, bass/midrange/treble control, mono L, R, L+R, mic input / (aux) 0.25" phono, phono, tape, tuner, aux 1, 2, silver faceplate with walnut cabinet, 2x switch cleaning removed and updated caps on amp board, wood case has scratches, unit needs TLC, #8+

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