buzzing from speakers


Recently picked up some used gear to assemble a decent, little condo system.

Recently noticed buzzing coming from the speakers when no music is being played. Thought it was speaker cable picking up hum from all the other cables strewn behind the wall unit, but after testing, that is not the case.

I'm concerned that the static electricity in my apartment may have damaged my amp somehow. I notice that almost every time i touch my equipment, i get a mild shock (because of the dry air in my condo coupled w/ carpet).

Could this have somehow damaged my amp /created this audible hum? I never noticed the hum in the past when i first picked up the amp, so i'm not sure if the problem has been there then entire time or if it's new.

Any thoughts?
loose

Showing 2 responses by loose

you know, I just might have something from the cable box still connected...I'm going to disconnect it when i get home after work and report back. (I've had this problem in the past at my old place...for some reason, i didn't think of it this time).

But my real concern is that I've somehow damaged the amp w/ static electricity.

Is this even possible? I know that one can blow out computer boards w/ static electricity, but i'm not 100% certain on whether or not it can damage amps.

...and all this JUST when i was getting my system to finally start sounding halfway decent. arrgh
well, since my initial post, I've disconnected the cable box, which made no difference. Following that, i disconnected speaker cables (and actually introduced others that I had lying around), attempted to isolate the speaker cable as best i could, yet the buzzing remains.

It's non-intrustive when music is playing and not noticeable, even without music playing, from the seating area.

I was told by a service technician whom i trust that static is not likely to cause any damage to an amp, however I'm still somewhat concerned only because I hadn't noticed it beforehand (although i never actually LISTENED for it when I first set up all the used gear).

Beyond that, another audio store owner suggested that many somewhat 'esoteric' amps have some background noise to them and that the amp may be working within its parameters (it's a Sugden A48b running Rega Ara speakers. Source is a Rotel rcd971).

Another point I failed to mention is that the amp has been modded by one Dan Santoni (I don't know if this means anything to anyone) who is apparently quite reputable.

For the moment, I'm simply going to live with it, as everything will be upgraded eventually anyway, starting with the CD player, i think...

Which brings me to a new thread ...see the Digital section .... 'Weak Link'