Audio Proz Service and Sales


Rockman Sustainer

Audio Proz Inv #: 9306

replaced 4053 buffer chip, repaired broken lands due to mounting screw too long, checked and okd all functions, this unit must be mounted to rack shelf with short 1/4" screws, price is for a pair.

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Symetrix 525

Audio Proz Inv #: 14570

Dual compressor, expander gate w/ compressor limit threshold output level, uses Valley People VCA modules, phone in and out, process loop in and out, new control installed.

$ 280  Contact Us  

Furman LC-X

Audio Proz Inv #: 14702

Expander/Compressor/Limiter, 1 space rack mount, Front: attack and release time, expand threshold and ratio, compress threshold and ratio, output gain, ouput limit, output level/gainreduction LEDs, de-ess switch; New w/Manual & Warranty

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Audio Proz Inv #: 14707

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$ 0  Contact Us  

Behringer MDX-1000 Autocom

Audio Proz Inv #: 17203

This is the older, more well built version compressor, actually a DBX 166 or 160x design (licensed to Behringer), with all controls and switches done better. I also correct a design flaw in these units (there is some sonic distortion and crosstalk of the controlling voltages into the VCA) and improve the power supply decoupling. Vince personally uses one of these units in his synth studio for final mix.

$ 200  Contact Us  


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Ashley CL52

Audio Proz Inv #: 18983

Stereo compressor, phone in/out, lots of easy to read lights, channel to channel calibration is excelltn, completely cleaned all controls and switches, compression calibration tracks evenly over 50dB range, did mods to improve grounds and power supply noi

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Alesis 3630

Audio Proz Inv #: 21395

Compressor/limiter with gate, dual mono or stereo operation, -10dBV or +4dBu on each channel, side chain, LED readout, switchable Peak/RMS and hard knee/soft knee, 1/4" phono in/out, modest performance, semi-pro studio item, cleaned controls/switches, nice cosmetic condition.

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Alesis 3630

Audio Proz Inv #: 21433

1 rack space lightwieght design (thin depth), full control for attack/release, gate circuit (threshold and rate), stereo link, OK general semi-pro studio use, +4/-10dB out with RTS phone jacks, nice LED display, cleaned controls and switches. **New Low Price!** Mint condition with box and packing.

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Behringer Composer MDX2100

Audio Proz Inv #: 23554

Demo, compressor/limiter/expander/gate, 2 channel, XLR and 1/4" ins and outs, original like new, better built, better performance, excellent high accuracy compressor, channel matching for tracking is superb

Units vary in retail cost due to condition. Real nice, modified, low use units get more money. The simple fact is this era design compressor is the same as the DBX XT !! But I modify many designs with more R.F.I. suppression and less R.M.S. detector noise getting into the audio V.C.A. (check the internet if not familiar with the abbreviations) Simply put, mods make a slightly cleaner, better accuracy and control of compression of the audio signals. This is done to accommodate today's higher quality signals from microphones and the intense dynamics in modern music.


**We want to be your Behringer dealer! After being among first to champion this great manufacturer, we are offering our most competitive pricing to be your Behringer supplier.**

$ 300  Contact Us  

Bellari RP-533

Audio Proz Inv #: 23734

Heavily modified by Vince. 7 new switches, overdrive control, combo mic pre/comp/eq with many added features. Low noise high gain tube modification. 2 Band Bass/Treble. Front panel paid gain/phase switch. Tape saturation control. Smooth fast compression switch. High gain / bright switch. Power supply ground mod. Transformer EQ optical mod. This is the cats meow! Call for details 617-926-8020. Top flight cosmetic condition #8 with just a tiny bit of rack rash. 

Some additional information customers have asked about:   This unit is 90% all tube, the op amps are for RMS, DC control, balanced out not audio! What I do is make the circuits have more head room less noise better tube character and more correct RMS detector tracking. As you may have noticed the output circuit clips badly and is nowhere close to semi-pro level. It's a wrongly done balanced line op amp stage. Also the compressor threshold and ratio controls are too sensitive, as such the unit can go into a strange and not very likable distortion if pushed. There is some good basic design circuits in this, but just not enough. My mods are not about installing fancy parts it's about improved circuit performance

$ 680  Contact Us  

Bellari RP-583

Audio Proz Inv #: 23887

Engineering model, modified-rev 6, unit has updated board installed-RP282 to RP583, dynamic eq bias/channel tracking within +/-2dB, assymetrical RMS/detector circuit installed, logarithmic slope detection, PS modifications/head room and noise mod. Calibrated +/- 1db channel to channel. Too much to list, call for details.

$ 880  Contact Us  


We have been selling and repairing professional and consumer audio equipment for over 40 years. (Read some of our customers testimonials here)

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.


DBX 118

Audio Proz Inv #: 24206

Dynamic range enhancer, can handle pro +14 dBm level, powerful linear compressor/expander, useful to compress listener program music to nice even level background, excellent audio quality circuitry similar to most expensive DBX equip., power supply cap upgrade, audio capacitor upgrade, calibrated, etc.

These machines are rare and special because they are true gain ranging compressors for engineers who want to squash a high dynamic range without much pumping. It is also able to expand dynamics, adding energy and depth to dead recordings.

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Symetrix SX206

Audio Proz Inv #: 26353

Multi Function Unit Processor, Very Interesting Function for Acoustic Synthesizer or Trick Effects, 1 space dual channel, Like Mint Condition Extremely Well Built Unit. **New Low Price!**

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Behringer MDX-2100 Composer

Audio Proz Inv #: 26386

Composer Compressor, Has upgrade RMS detector mods. Super Low noise P.S. mods. Channel matching/compression calibration. Call for Details.

$ 280  Contact Us  

Aphex 106

Audio Proz Inv #: 26497

4 channel compressor, GAIN RANGING COMPRESSOR

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DBX 119

Audio Proz Inv #: 26833

RCA A+B in/outs, RCA outputs to preamp.

These machines are rare and special because they are true gain ranging compressors for engineers who want to squash a high dynamic range without much pumping. It is also able to expand dynamics, adding energy and depth to dead recordings.

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Furman LC-3

Audio Proz Inv #: 27176

New in box! This unit functions as a compressor, limiter, and deesser. Input level, output level, attack, release, and compression ratio controls. Overload indicator, gain reduction meter, and pilot light. Professionally cleaned, serviced, and calibrated.

$ 160  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.


DBX 503

Audio Proz Inv #: 27352

Modified 3 band compressor/expander with vairiable control. Ground, power supply, and input gain modifications. Nice controls. Excellent unit.

The 503 is simply the rack mount version of the original 3bx expander design with 2 variations of circuits. 1 version 3bx used all discreet circuit parts and actually can sound a little tube like with some harmonic "thickness" due to the VCA design. This is a very rare version. The later second version used a custom made dbx IC used in most vintage products. Both 3BX are known to sound robust in comparison to modern 3BX XDS which can sound a little forward and slightly bright.

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Furman LC-6

Audio Proz Inv #: 27743

Stereo Compressor/Gate in near mint condition. 2 channel compressor w/ channel link, each channel features input gain, gate threshold, attack, release, ratio, threshold, output gain, and gain reduction meter. Back panel features: Balanced I/O, RCA I/O, Side Chain I/O. Unit has seen low hours of use and it shows. It has excellent calibration channel to channel and is more of a volume ranging compressor as it does some "make up" gain automatically when compressing. Completely cleaned and calibrated.

$ 160  Contact Us  

Symetrix 522

Audio Proz Inv #: 27811

Limiter Compressor, 2 ch. Slave switch/external detector, RF earthing cap, minor upgrades, excellent condition. #9  Unit with Valley People VCA Modules---NPW Probably SOLD Similar unit available

$ 340  Contact Us  

DBX 166A

Audio Proz Inv #: 27812

2 channel compressor w 1/4" and XLR connectors for inputs and ouptuts, excellent channel tracking, peak stop circuit, excellent expander gate, limiter, bypass, unit has excellent channel matching compression, well-built button controls, cleaned switches in excellent shape and works perfectly

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DBX IBX-DS

Audio Proz Inv #: 28040

Unit in excellent cosmetic condition. Transition level control, compression/expansion level control, impact recovery level, ambiance level, LED dynamics level meter, LED impact meter, compress/expand indicator, pre/post bypass, source/tape switches.

$ 140  Contact Us  

DBX II 128

Audio Proz Inv #: 28047

Compressor, Dynamic Range Enhancer, Noise Reduction system. Front panel features: Above threshold/linear switch, level adjust, compress/expand ratio control, pre/post enhance, rec/play/bypass selection, tape/DBX disc selection, play level match control. Unit designed for cassette or reel to reel. Excellent cosmetic condition. Completely cleaned, serviced, and calibrated.

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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.


DBX 117

Audio Proz Inv #: 28084

2 channel compressor Face is slightly stained. wood side panels ok. all serviced and calibrated.

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Aphex Compellor

Audio Proz Inv #: 28097

Compressor/enhancer. later version with updated circutry. XLR in and out only. Super Best quality compressor best sounding easy gain riding compressor. complete cleaning and calibration, excellent condition.

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