Audio Proz Service and Sales


DBX 224X-DS Type II

Audio Proz Inv #: 45910

Single space rackmount stereo tape noise reduction system. Has switching and jacks for two tape decks, including bypass and dubbing. Record and play level controls. Unbalanced and RCA phono connectors. Serviced, cleaned, and tested OK (rack ears added), in mint condition with original box and packing.

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DBX 228 Dynamic range expander.

Audio Proz Inv #: 28044

One space rack mount. Unit performs disc encode as well as tape encode/decode.

$ 200  Contact Us  

DBX 263A

Audio Proz Inv #: 16100

De-Esser with rack ears

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DBX 410

Audio Proz Inv #: 53303

For 900 series racks. #9 Condition. Tested, calibrated.

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DBX 463X

Audio Proz Inv #: 17830

Noise Gate. Box, Packing, Manual. 1/2 Rack Space. Accessory pack.

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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.


DBX 463x

Audio Proz Inv #: 44323

Noise floor unlimiter style gate (forces noise floor down and expands away from noise floor). Very usable for Home and/or studio use with very basic threshold and level. One time demo unit but still like new, in original box and packing. No rack kit included.

$ 100  Contact Us  

DBX 463x

Audio Proz Inv #: 46171

Noise floor unlimiter style noise gate, forces noise floor down and expands away from noise floor. Basic threshold and level controls. Very good #8 condition.

$ 80  Contact Us  

DBX 900 Series

Audio Proz Inv #: 53365

Rack unit, equipped 8 DBX411 units. Equipped with 8 DBX41 units. 8 RCA Rec i/o. 8 RCA rec i/o. -3 RU. 7+ Condition, all modules tested and calibrated QC'd. Needs TLC upon purchase.

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DBX 941

Audio Proz Inv #: 53364

For 900 series racks. Type II noise reduction. 2 Channel encode. #9 Condition.

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DBX Daki

Audio Proz Inv #: 51546

Noise reduction for excellent play back. Stereo. HUUSES DBX Parts 146742, (4 146732. #9 condition.

$ 88  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  


Re: International Shipping: We ship internationally often and have yet to encounter a problem or complaint. We are very careful to test the equipment before it’s packed and then to double box the machine with added protection when needed for front panels, etc. We are not amateurs or an ebay store; we know these machines very well and know what it takes to get them to you safely. We use USPS priority internationally which seems to be the cheapest. If you prefer another carrier (you should know who delivers to your area reliably) please let us know. Also please be aware of any tariffs that you may be responsible for upon pick up on your end. International shipping may be expensive but we will make sure it is not a headache on top of the cost. PLEASE NOTE THAT SHIPPING INTERNATIONALLY WILL BE A MINIMUM OF $16 EVEN FOR SMALL PARTS.


DBX II 122

Audio Proz Inv #: 49633

Silver face noise reduction system with record, bypass, play buttons, play level match control, and tape and disc play modes. Excellent condition, cleaned, serviced, and calibrated by AP. This unit could be purchased just to have replacement VCA cards!

$ 120  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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DBX NX-40

Audio Proz Inv #: 44924

Two channels, with RCA in/out. #8 condition with some wear to top cover, but very good mechanics and faceplate cosmetics. Fully cleaned, serviced, and calibrated.

$ 66  Contact Us  

DBX NX-40

Audio Proz Inv #: 55061

2 channel encode decode. DBX 224 Type noise reduction. In 1/2 box design, very compact. All cleaned, calibrated. 9 condition.

$ 120  Contact Us  

DBX RX9

Audio Proz Inv #: 3162

TEAC Noise reduction, needs relays and work on circuit board which we do here.

$ 200  Contact Us  

DOD FX-30B

Audio Proz Inv #: 28582

Excellent condition, works as noise gate - effectls loop. Release, gate sensitivity controls.

$ 30  Contact Us  


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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.


Fisher NR-500

Audio Proz Inv #: 27755

Dolby D super NR similar to Dolby B but further reduces noise hiss, best to set play level calibration very high to overcum low level signals which may be excessively nose reduced. Can be used as Aphex type presence enhancer, excellent 2 channel calibration (made originally for Nakamichi and JVC).

$ 160  Contact Us  

Furman QN-4A

Audio Proz Inv #: 27005

1/4" phone in/out/key. No xlr. Ground lift switch. Threshold release depth controls. 4 channels. 1 space chassis w/rack mount. Power supply ruggedized by Audio Proz. Serviced, cleaned, and QC OK.

$ 110  Contact Us  

Hush Systems IICX Noise Reduciton System

Audio Proz Inv #: 42107

Hush (Rocktron) Systems 2 channel unit, each channel has 1/4 inch ins and outs, Threshold, and Sensitivity controls, excellent machine in perfect condition, includes operating manual and power supply

$ 125  Contact Us  

KLH Burwen Research DNF-1201A Faceplate

Audio Proz Inv #: 43303

Faceplate for KLH Burwen Research DNF-1201A Dynamic Noise Filter. Rack mountable. #8+ condition with minimal rack rash, very minor wear, and all lettering perfect.

$ 20  Contact Us  

KLH TNE 7000

Audio Proz Inv #: 70214

Nick and Tick reduction 2 space rack Unit Modified with control for variable window of tick & pop capture. SPECIAL ENGINEERING MODEL (Rev 5). Stereo phone jack In & Out . Retro Knobs #8+ condition 

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KLH TNE 7000A

Audio Proz Inv #: 57213

Phonograph de-click and pop reduction device. Rack mount, Rev 5 modification, TLO75 Op amps,  Nice Face. condition #8+

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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 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  

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