Audio Proz Service and Sales


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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QSC MX 700 Stereo Amplifier

Audio Proz Inv #: 70120

PA Amp, 4-8 ohm, 150-225W per channel, 2-space rack, 1/4" ins, banana outs, Left and right gain control, Rental unit - has not seen much use time, Modified low-noise fan, Condition #7+

$ 200  Contact Us  

Pyle Pro PT-2400

Audio Proz Inv #: 72248

19" rack mount power amplifier, 80-100 watt, dual XLR / 1/4" combo jack and RCA inputs, dual output level controls, A/B speaker selectors, front panel headphone jack, 110/220 voltage selector, low use unit, 2 speaker switches well designed very rugged with speaker relay protection, face has slight spotting condition #8+

$ 228  Contact Us  

Pioneer SR-303

Audio Proz Inv #: 17246

Stereo reverb amp, blue "tunnel" display window

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Pioneer SA9500

Audio Proz Inv #: 25170

Int amp. We do not have one for sale presently, but we can supply service and parts for this unit.

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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.


Pioneer SA-9100 Integrated Amp

Audio Proz Inv #: 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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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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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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Pioneer SA-6500 II

Audio Proz Inv #: 27021

Stereo Amplifier, Silver faced unit black top, Lights Replaced, Cleaned and Serviced.

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Pioneer SA-5200

Audio Proz Inv #: 56864

Stereo integrated amp with silver face and wood sides. Ins: Phono/Tuner/AUX 1/AUX 2; Controls: Treble/Bass/Volume; Features: Speaker AB/Tape Monitor/Loudness/Mono/Stereo. Low use unit with upgraded capacitors, fully serviced and calibrated. Condition: 8+ (missing unit may have been sold)

$ 148  Contact Us  

Pioneer Elite A-35R

Audio Proz Inv #: 71512

Integrated amplifier with CD / tuner / line / phono / tape 1 / tape 2 inputs, and 2 independent relays for speakers A & B. Remote. Direct mode (bypass tone control). Basic cleaning done, relays okay. Virtually no use. Condition 9

$ 208  Contact Us  


We know you have many options for purchasing audio equipment and parts, and we truly appreciate your business.  We strive to offer good products at competitive prices.  While we can't always match the prices of one isolated reseller, we make up for it by carefully selecting, testing, and finding unique and special rare parts, and we are here for the long run.  We guarantee everything we sell and we hope it helps you to enjoy a great listening experience.

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.


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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Phase linear 200 solid state amplifier

Audio Proz Inv #: 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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Peavy M-4000

Audio Proz Inv #: 71866

Very well done design, Excellent Audiophile Grade Super Amp, 200+ watt per channel, fan (low noise modified), phone jacks and RCA ins, level controls, all cleaned and calibrated, virtually unused from Hi Fi system. condition #9 

$ 288  Contact Us  

Peavey PA-100

Audio Proz Inv #: 24731

Mixer Amp, Combo Design - Ch 1-3 for keys, bass, etc., Ch 4 is Hi Gain for Guitar, Spring Reverb

$ 150  Contact Us  

Peavey KB40

Audio Proz Inv #: 60364

New horn tweeter installed, combo amp for keys, has pre out / power amp in, internal limiter, discreet amp design, 2 way with 12 inch driver and horn for excellent presence, super loud crank, also eq patch in/out, unit could be altered easily with different eq, damped box, woofer cone, little dusty, light rust, low use time, very clean internals, #8+

$ 400  Contact Us  

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


Parasound model 275 V2

Audio Proz Inv #: 63199

Slime Line 100 WATT AMP, excellent build quality!  Auto On/Off circuit, RCA IN's Banana Out's. #9 low use, AP serviced & tested, All Ok.

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Parasound HCA-750A

Audio Proz Inv #: 52818

audiophile quality amp, dual power supply, super low noise, 100 watts, input levels, relay breakers, top build quality, 3 space rack design, black, calibrated, tested perfectly, condition 9+

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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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Parasound HCA-1200 II

Audio Proz Inv #: 64145

Super rugged Audiophile grade Power Amplifier, well done with a clean design. Has back panel level controls and heavy duty speaker relays. 200 watts /channel at 8 ohm. Unit does show some faceplate wear but Low use unit. #8 condition.

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Optonica SM-4545

Audio Proz Inv #: 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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Onkyo M-501

Audio Proz Inv #: 57801

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

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Email Us or call (617) 926-8020 for more information about ADA modifications and repairs.


Onkyo Integra A-8190

Audio Proz Inv #: 62193

Integrated stereo amplifier. 100 watts /8 ohm. 6 Stereo Line In's + Phono MM/ MC  Complete shop service; cleaning and calibration. VERY LOW USE, Well made unit , #8+ condition

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Onkyo A-10

Audio Proz Inv #: 55726

Integrated stereo amplifier. MC/Phono1/Phono2/Tuner/Aux inputs. Speaker A/B/C/A+B/A+C. Bass, Treble, Balance, Volume controls. Dubbing, Monitor, Subsonic, High Cut, Mode, Loudness, Muting features. 1/4 inch phones jack on face. Silverface unit. 8+/10 condition. Some lettering worn off and some dust inside.

$ 340  Contact Us