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.
We have been selling and repairing professional and consumer audio equipment for over 40 years. (Read some of our customers testimonials here) We keep our database up to date with over 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 $24 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.
Symetrix 511
# 14218
Noise reduction system, 1 rack space, 2 channel noise filter, XLR in outs phone in/out. Used as AP engineering sample.
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.
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.
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. Unit Possibly SOLD, paperwork not in file
Local customers, please do not come to the shop without calling ahead first - (617) 926-8020 - for an appointment, so that we can more efficiently help you with your equipment or sound recording needs. We keep our database up to date with over 10,000 items in stock.
If you see a part number and a price, we have that item in stock.
Customers outside of the U.S., please note that international shipping can be costly (US Post $24 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.
KLH TNE 7000
# 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
Click and Pop eliminator, excellent condition, modified - call for details
The TNE is rackmount and in like new condition, but I only sell the Audio proz modified version. (This is a highly in demand piece that usually has a waiting list) This mod makes the unit work remarkably better. The same is with the 1201A, which is in a slightly worn condition, but certainly very acceptable. This unit also has a modification. See our listing #60892I was the chief line tech and production assistant at Burwin research and even though my modification is simple and clever, it took a year to design. I myself was desperate for a better, wider applicable performance. The unit works better with many phono preamp cartridge combinations. I do prefer Stanton and Audio Technica cartridges because these guarantee honest bandwidth and correct stereo separation which is critical to best nick pop elimination. The Stanton 680 or 681EEE or AT 311 EP or 440ML is excellent. Indeed the ART phono preamp with proper cartridge loading switches and level control will optimize the TNE performance. I am on the side of laboratory standard ideals and not audio-“phoolish”, intentionally off RIAA standard preamp designs, which can be sometimes interesting sounding, but is usually just strange equalization tricks to impress the consumer. In my opinion its best to have an out board equalization to fix the many and varied equalization “opinions” existing on the stereo-mix of the record. See all about the complete TNE mod service here: https://www. Audioproz. Com/AP. Php?Article=46
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.
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.
We have been selling and repairing professional and consumer audio equipment for over 40 years. (Read some of our customers testimonials here) We keep our database up to date with over 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 $24 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.
SAE 5000A
# 55950
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.
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.
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.
