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.
Single ended noise reduction, 1/2 rack space, very popular device to quiet guitars or bass/keyboards
Single ended noise reduction. Half rack space. Excellent #9 condition.
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
Encode/decode noise reduction, 4 stereo channels (8 total ins & 8 total outs). This unit works by reducing an incoming signal so that it remains well above the noise floor and then expanding the clean output signal at its original level. No box or manual. Good condition with scratches on top cover and minor rack wear.
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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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Silver Face, Practically mint condition Dolby C noise reduction
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Noise reduction system, 1 rack space, 2 channel noise filter, XLR in outs phone in/out. Used as AP engineering sample.
Modified w/ ground lift switch. Excellent Cosmetic Condition!
with rack ears, SN:430309. Converted FV to always on dbx #9+ condition
DBX Noise Reduction rack unit. 4 ch, 16 RCA phono jacks on rear, 4 each (input, output, encode out, encode in), selectable 4-channel NR. Unit cleaned throughout. Excellent condition, minor scratches.
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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
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)
4 channel DBX with rack ears. Cleaned, tested, minor cover scratches. 8+ condition
Noise reduction module, accessory for 80-8 tape recorder, bag, manual, 16 RCA cables, no warranty card. Known to be in good condition. This unit is priced on request depending on service required. $250 (Tested appears to work, minimal repair, clean up time is spent) - $400+ range (Full restoration everything repaired, all relays cleaned (there are 16 of them!!) tested, calibrated, etc.) These are 30 years old, it is almost a requirement to really perfect. Once serviced correctly these are very reliable and great performing machines. We also do a modification in the circuit which reduces the circuit noise another 4 to 6 db and also reduces the crosstalk, simulsync, playback at high frequency by almost 10 db. A significant improvement. $160 for the modification.
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Classic Mid 70s teac noise redux w/dolby, hooks up between tape deck and receiver/preamp, super spec calibration, excellent fidelity
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