Audio Proz Service and Sales


Advent 100

Audio Proz Inv #: 49007

Dolby B noise reduction unit. Correctly restored, carefully calibrated and tested. Very good #8+ condition with some very minor scratches on faceplate and slightly darkened back panel jacks. We can also service and supply parts for these units!

$ 200  Contact Us  

Tascam DX-4D

Audio Proz Inv #: 55359

4 channel DBX with rack ears. Cleaned, tested, minor cover scratches. 8+ condition

$ 220  Contact Us  

DBX 224

Audio Proz Inv #: 41210

Later new version. Stereo type II tape noise reduction, With silver rack ears (with obvious wear) simultaneous encode/decode, older/space rack, front panel: Tape/Bypass/dbx Disc Selection, rear panel: preamp RCA STR I/O, Recorder RCA STR I/O, LUL ADJ, Trimmers: Tape Rec/Play, Disc Play.  Cannot be converted to 220v. Like new cosmetic condition #9

$ 228  Contact Us  

Rocktron prorax CE1

Audio Proz Inv #: 72659

Gain reduction,  Compressor/ Expander. Tested OK. All switches and controls triple cleaned. Replaced regulator and upgraded main filter cap for regulation. Fully functional unit. Top cover has a fair amount of scratches. Faceplate mostly clean with some signs of use and light scratching. W/ AC adapter (120V AC 60hz 9w, 15v DC 300mA) #8- Condition

$ 230  Contact Us  

DBX 224 Type II

Audio Proz Inv #: 47486

Recording Technology Series, Rack Mount Heavy Duty Real Pro Construction. Simultaneous encode/decode, RCA ins/outs, level adjustment control for record, play (tape) and play (disc). Rack ears included -minor scratches at rack holes, low use unit, cleaned and fully serviced. +/- .5db calibration. #9 condition, 

$ 240  Contact Us  


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.


Tascam DX-4D

Audio Proz Inv #: 43745

DBX I noise reduction. 4 channel professional noise reduction with 4 channels of direct inputs and 4 channels of direct outputs. 4 ch. encode out, 4 ch. decode in. Completely cleaned calibrated and tested in #9 condition. (Minor scratch top cover/rack rash)

$ 260  Contact Us  

Symetrix 511A

Audio Proz Inv #: 23052

Modified w/ ground lift switch. Excellent Cosmetic Condition!

$ 280  Contact Us  

DBX 157

Audio Proz Inv #: 38484

Declinear Noise Reduction System. With AP power supply upgrades, totally cleaned, serviced, calibrated. Nice wood sideboards, excellent mechanical and cosmetic condition. This unit contains a valuable VCA module.

$ 280  Contact Us  

Phase Linear 1000

Audio Proz Inv #: 59325

Autocorrlator noise reduction system. Dynamic range recovery. Peak unlimiter/down Expander, Autocorrelator. Low freq, calibration controls. Many modifications,crucial capacetor update for better performance and channel to channel spec. ground MOD for super low noise.

$ 300  Contact Us  

DBX 163x and 463x

Audio Proz Inv #: 50904

Compressor and noise gate pair mounted together in rack. Very good #8+ condition with many tiny minor scratches on ears and face.

$ 300  Contact Us  

DBX 172

Audio Proz Inv #: 16489

Dual channel expander and gate with balanced ins and outs. Like new with original box and manual, used only a few times as a rental demo. The best gate ever made!

$ 320  Contact Us  


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 158

Audio Proz Inv #: 25466

8-channel Noise reduction System! w/ 5x410 and 4x411

$ 340  Contact Us  

Presonus GTX44

Audio Proz Inv #: 42380

4-chan noise gate/expander for pro use. Balanced XLR in/out with unbalanced 1/4 in/out. Key input. Fully tested and cleaned. #9 condition with some minor rack rash. With manual.

$ 340  Contact Us  

DBX 158

Audio Proz Inv #: 22598

8-channel Noise reduction System! Has 8 DBX 410 cards. Mint condition.

$ 360  Contact Us  

Phase Linear 1000

Audio Proz Inv #: 56265

Auto correlator noise reduction system with Rev 6 modifications, low noise TLO75 IC update, some capacitor update. Dynamic range recovery system. Wood case, vintage knobs. Low frequency calibration. 9/10 excellent condition.

$ 388  Contact Us  

DBX DUAL 155

Audio Proz Inv #: 8130

2 sets rack. Cleaned all front panel switches, play and rec. Calibrated controls, calibrated for 0 dB. Checked calibration .5 dB difference max between channels. Checked crosstalk, 3 mv internal between record in and play out max. Mint Condition.

$ 550  Contact Us