Audio Proz Service and Sales


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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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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Rotel 970BX Integrated Amp

Audio Proz Inv #: 52822

RA-970BX. Slimline, black. Basic Integrated amp. No phono in. CD, 2 AUX, 2 Tape, Tuner. Bass/ Treble controls. Cleaned and re-enforced. Connections, 60 Watts per channel. Comes with box and manual. #9+ condition.

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Rolls RA62

Audio Proz Inv #: 32700

headphone amp, 6 separate headphone outs, each channel has individual level control and insert, main in and stereo in, as new in box

$ 148  Contact Us  

Rolls PM52

Audio Proz Inv #: 53145

passive headphone tap, power amp loop, mono/stereo selection, 2 headphone out, condition

$ 32  Contact Us  


FYI, Around the database you will often see us describe the condition of units on a scale of 1-10. #10 would mean the product is new from one of our suppliers, such as Behringer, Audio Technica, etc. #9 means the product is in perfect condition but is used, #8 implies there are some minor cosmetic scratches but unit is mechanically perfect, and so on and so forth.


Roland JC-120

Audio Proz Inv #: 28147

Jazz Chorus 120 combo amp. Excellent cosmetic condition. Completely cleaned and checked out. This version is at least mid period or later. Very low use (in home environment only). Great fidelity and clarity, any good effects will sound great through this. Very well done Roland equipment, in excellent #9 condition.

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Rocktron Rampage R10 Amp

Audio Proz Inv #: 57679

10 watts, 6" speaker. Unit has low use time. Features headphone jack and overdrive effect; overdrive has been modified to be less aggressive with lower noise. Condition: 9

$ 48  Contact Us  

Rocket fish kit RF WHT1B

Audio Proz Inv #: 59337

Simple add on to speaker wire and RF wireless jump to second receiver (AMP, with delay) time correction. OK product for small budged. Condition #9

$ 66  Contact Us  

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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Realistic MPA-45

Audio Proz Inv #: 42651

small compact mixer amp, 3 band eq section, 2 mic phone Ins, basic 60 watts PA system with a very rugged design

$ 90  Contact Us  

Realistic MPA-40

Audio Proz Inv #: 40384

3-channel, small industrial/performer unit, two mic 1/4 inch inputs, one phono or aux select input, 3-band graphic EQ, mono output

$ 110  Contact Us  


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


Realistic MPA-40

Audio Proz Inv #: 50081

35watt PA amplifier with two mic inputs and aux/phono inputs. Transformer output stage and nice EQ section good for voice or guitar. Excellent condition.

$ 80  Contact Us  

Realistic MPA-20

Audio Proz Inv #: 46431

Mono 20watt mixer and amplifier, very compact and can run on 12v battery! Aux/phono/two mic phone input connectors. Also works well as a guitar amp to mix in effects! Excellent condition, professionally cleaned and serviced.

$ 88  Contact Us  

Raymer, True tone electronics 804-100

Audio Proz Inv #: 62481

Solid State PA type AMP. Bass, Treble, Master volume controls. Mike input (Hi Z/Low Z), Music (aux) Input. 6.2 OHM, 16 OHM, 50 OHM, TAPS (25V, 40V, 70V). 70 Vault, 60 WATT. As is needs service but easy to service. #8 condition.

$ 18  Contact Us  

Rane HM42

Audio Proz Inv #: 18584

Mixer headphone amp, 4 channel stereo unleveled mixer to 2 headphone separate level out - modified ground circuit - very quiet, excellent headphone amps.

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Rane HC6

Audio Proz Inv #: 29239

headphone amp, excellent condition, demo unit, with improved grounding and power supply

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Rane HC-6

Audio Proz Inv #: 55223

Headphone console; 6 channel, balanced 1/4" L/R input, better version (SN - 12235), grounding mod to reduce noise, 9+ condition

$ 138  Contact Us  


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.


Radio Shack MPA-101

Audio Proz Inv #: 70272

2 rack space. 100 watt. 5 channel input. (Mic, Phone, XLR, Phono, Aux) NEEDS CAP REPLACEMENT AND CLEAN #8 Condition.

$ 118  Contact Us  

Quantum 25r Twin

Audio Proz Inv #: 48908

Small 30watt combo amp with 6" dual speakers. Features overdrive controls, spring reverb, carpet cabinet. AP installed two new speakers, one heavy duty "thick sound," one vintage alnico "thin cone lead" sound. Two different drivers to create a very "high fi" little amp combo! Professionally cleaned, serviced, tested, with board resoldered for better reliability. Overdrive sound is not great, but very nice acoustic fidelity! Very good #8+ cosmetics.

$ 180  Contact Us  

QSC RMX1850HD

Audio Proz Inv #: 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)

$ 440  Contact Us  

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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QSC RMX 1850 HD

Audio Proz Inv #: 70731

Power ratings 350W - 8ohm, 600W - 4ohm, 900W - 2ohm, 1800W bridged 4 ohms. Barrier Strip, XLR and 1/4" input jacks. Speakon and binding post outputs. Has full features for bridging and soft limiting. Virtually no use time. Set proper bias and cleaned controls. Conditions #9.

$ 428  Contact Us  

QSC PLX1602

Audio Proz Inv #: 33200

Step-up rail voltage design for high powered use, actually not a modern digital amplifier, lightweight amp, very super reliable design, Condition #8 Low use rental

$ 480  Contact Us  


Need your guitar or bass amp tuned up? We are now doing repairs, upgrades, and modifications to all types of guitar amps. Orange, Mesa Boogie, Fender, Marshall, Hughes and Kettner, Peavey, Ampeg, Gibson, Silvertone, etc. Read more about it here


QSC PLX1202

Audio Proz Inv #: 33198

Lightweight switching pwr supply design, road case available, please inquire!

$ 550  Contact Us  

QSC PLX-1202

Audio Proz Inv #: 33199

Lightweight, switching mode amplifier, 221b

$ 440  Contact Us