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In Reply to: RE: Edgarhorn Seismic Sub hums posted by Stang on February 16, 2015 at 09:43:32
Check with Hsu, it's probably the main filter caps.
A few years ago there was a rash of bad filter caps, computers, audio gear, etc., all were hit hard.
Follow Ups:
I have an older HSU sub with plate amp that a friend asked me to look at with same hum problem. I was going to pitch the plate amp.
Jim
After open the plate amp and found most of components and cables were bonded with RTV and would be difficult to work on it. Talked to Dr. Hsu and I was told the amp is not worth repairing and recommended the model 500A they've on sale for $299. Just installed the 500A and it work fine and sound great for $299. Hsu changed the amp crossover from 51 Hz to 75 Hz. Thanks for all the responses.
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