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
Rev.6 version, all updates, TL075 op amp, Super Spec Machine. Very minor face edge scratch, Rack-mount design, no rack rash #9- condition
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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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4 channel noise reduction, this version has no FV cable. Converted FV to dbx always on. With rack ears. #8 condition
with rack ears, SN:430309. Converted FV to always on dbx #9+ condition
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Stereo hiss, noise reduction. For use with tape decks, and records. This is a Modified version that allows more of the high frequencies and music ambiance to be retained when the filter operates. Rack mount 110/220 VAC. Much nicer operation in modern use. Minor but obvious face scratch, #7+ condition
Dolby B. Outboard unit. RCA in/out. Encode or decode (not simultaneous) with level controls, test tone calibration, trim controls on front panel. Calibrated internally to +/- 1db tracking. 9/10 condition.
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.
(2) with 2 holes 5/8 inch apart with hardware. 8+ condition.
Rack-mount noise reduction unit. Modified updated version with better high frequency filter, is less obvious for tape hiss reduction. Condition: 9
Phonograph de-click and pop reduction device. Rack mount, Rev 5 modification, TLO75 Op amps, Nice Face. condition #8+
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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.
Phonograph nick and pop reducer. Does not have preamp. INR SYS INVERT/DEFEAT, TAPE MONITOR, SENSITIVITY FADER. AP mod done to improve control calibrating and sensing and filtering the pop or click. Also board has been ruggedized with solder and better caps in power supply. Black brushed aluminum face with wood sides. Minor modification to sensitivity control to lessen audible blanking of audio. Fully serviced, low hours use. 9 + condition. It works good but TNE or Burwen 7000 is a superior design and with my mods it's as good or better than any computer attempt. I worked with Burwen and have upgraded a superior TNE. I am a little famous for this as well as APT products.
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Unit will do 4 channel encode or decode or 2 channel simultaneous 2 channel decode. Tested, calibrated. Unit requires minor calibration set up
4 channel DBX with rack ears. Cleaned, tested, minor cover scratches. 8+ condition
2 channel encode decode. DBX 224 Type noise reduction. In 1/2 box design, very compact. All cleaned, calibrated. 9 condition.
Dbx 224 Later Version -Silver Trim with anodized black face No Rack Mount -120 VAC - All cleaned and calibrated. #9 condition
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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.
For 900 series racks. Type II noise reduction. 2 Channel encode. #9 Condition.
(1 in stock) Low use, mint condition. No rack mount ears. In original boxes! #9 Condition.
For 900 series racks. #9 Condition. Tested, calibrated.
half rack unit, phone in/out, 2 channel encode & decode, no rack ears, unit has a worn face, used as a rental unit, serviced and calibrated, condition 7+
intact but needs repair, selling for parts or a rebuild
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type 1 unit, 2 channels A+B, noise reduction in/out switches, front panel: rec/play calibration, level adjustment, rear panel: console input/output tape input/output, no rack ears, condition #9
type 1 unit, 2 channels A & B, noise reduction in/out switches, front panel: rec/play calibration level, rear panel: console input/output, tape input/output, no rack ears, scratches on top cover, condition #8