Impulse Noise Reduction System
One of the unavoidable obstacles which has challenged recorded music since the very first phonograph is impulse noise - those annoying pops and clicks which appear even on brand new records.
Like its predecessor, the SAE 5000A has been designed specifically to reduce these impulse noises and help you to once again enjoy those irreplaceable records you might have written off as hopelessly scratched.
Output level: 2.5V (9V max)
Frequency response: 20Hz to 20kHz
Signal to noise ratio: 90dB
Total harmonic distortion: 0.1%
Dimensions: 273 x 76 x 235mm
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Reviewed Mar 17th, 2016 by Leo Jablonski
I recently purchased a used SAE 5000 for $30 Canadian and at that price, I wasn’t surprised when it didn’t work at all. Since I found the schematic diagram on line, I decided to open it up to see if I could repair it. I was quite surprised to see that all 3 of the Texas Instruments voltage comparator LM337 chips were melted. They looked as if someone had gone over them with a torch and I’d never seen anything like that before. I poked around inside with a multimeter and all of the other components looked and/or tested to be OK. I replaced the 3 chips (at a cost of $2.55 Canadian) and the unit now works perfectly!! The other unusual thing was that the fuse holder was bypassed and it looked like it came out of the factory that way. I wired the fuse in place and the unit now only draws 50mA of current (power on but not processing audio). The LM337 data sheet is dated 1979, which is about when this unit was introduced, so it seems that the chip was quite new at the time and may have had a bug. I’m beginning to think that the 5000 and the 5000A are identical, except that the 5000 may have had some bad chips and Texas Instruments (and SAE) later solved the problem and introduced the 5000A.
Anyway, I’m quite pleased with the unit. It isn’t exactly a miracle cure for the noisiest of records, but it really helps reduce noise.
Reviewed Oct 21st, 2015 by audiomagnate
This does exactly what it was designed to do. I use mine on all but my best records. On the ones in decent condition I use it with a light touch (slider to the right) but on really bad records from my Dad's collection it makes even the worst records listenable. The inverse button is very helpful for getting the setting of the slider just right.