Single ended noise reduction. Half rack space. Excellent #9 condition.
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.
4 channel expander/gate. Balanced XLR and 1/4" in/outs. Parametric side chain eq filter (built in). Fully tested and cleaned. Light rack rash at screw holes on rack ears, #9 condition, excellent. Popular with studio and live sound. With manual.
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.
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+
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.
(2) with 2 holes 5/8 inch apart with hardware. 8+ condition.
Excellent condition, works as noise gate - effectls loop. Release, gate sensitivity controls.
#10 condition. NEW. SALE
Ultra-Compact 2 Channel 1/4 TRS hum destroyer. Dual mono or stereo. (Identical item available)
We offer expert time-saving advice on repairing many types of home and studio equipment, as well as consulting for product and recording issues, at a fair and reasonable cost. For complex matters, we sometimes must charge a small technical fee. If we can help solve your repair problem or technical conundrum, give us a call. (617)926-8020.
Ultra-Compact 2 Channel 1/4 TRS hum destroyer. Dual mono or stereo. (Identical item available)
Ultra-Compact 2 Channel 1/4 TRS hum destroyer. Dual mono or stereo. (Identical item available)
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.
With 9 units of 411 cards. #9 Condition. Not serviced.
Phonograph de-click and pop reduction device. Rack mount, Rev 5 modification, TLO75 Op amps, Nice Face. condition #8+
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Multiband Denoiser, 2-Channel Single-Ended Noise Reduction System. Multiband frequency analysis and processing. TAC (Transient Attack Control) dynamic filters respond accurately to signals with fast attacks. Auto-filter circuitry for automatic sliding filters. Integrated IRC expander circuitry. Adjustable cut-off frequency and release time. Noise reduction of up to 80 dB. Dual-mono or true stereo couple function.
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.
Noise Reduction, 2 rack space, Modified by AP to reduce hiss very carefully without excessive high frequency loss. Works well on tape and FM signal, 4136 opamp gives slight tubaphonic veiled sound. A somewhat archaic device but still usable as a substitute Dolby decoder or to warm up the audio character of excessively bright recordings.
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Noise reduction system, 2 rack space, 4ch, all RCA in/outs. No rack hardware included.
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w/10x411 Modules, the power chassis get $100 plus alone, each module if sold separately gets $80-$120. Our shop owner might make a dial for the complete unit, it is low use equipment in storage for many years that came out of the shop owners personal studio and in total is in B+ condition.
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.
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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We have been selling and repairing professional and consumer audio equipment for over 40 years. (Read some of our customers testimonials here).
Decliner Noise Reduction, 2 Rack Space, input level matching, RCA Jacks, 2 channel, simultaneous encode/decode
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Noise Gate. Box, Packing, Manual. 1/2 Rack Space. Accessory pack.
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