Buzz from speakers

When you play music, can you still hear this "buzz" through the music?

Make sure you use the most pristine recording possible for your test.

Don't mistake "take hiss" from the original recording for the hiss you're hearing with only the amp connected.

You may just be hearing "hiss" from your speakers due to bringing raw current to them from your amplifier.

This is common and not necessarily a problem. In fact, the more sensitive your speakers, the louder that "hiss" with no music playing.

You can "clean" that hiss with dedicated circuits and AC Conditioning, but it is unlikely you will eliminate it.

If that hiss disappears when you play music with no hiss in it, it isn't a problem.

Also, listen from your listening position, not with your ears so close to the speakers. If you can't hear the hiss from your listening position with only your amplifier connected, I wouldn't worry about the hiss, but I would still consider dedicated circuits and/or AC Conditioning.

Several of the above problems will cause a buzz; cable TV connector, a bad tube on the amp or preamp (I'm not familiar w/ your models) or some other device on the same circuit that is emmiting "something" (EMI/RFI). You say the listening room is in a garage. What other components/appliances do you have on the same circuit? Is the electrical wiring in the garage the same as the rest of your house (i.e.,not installed later)?

Also, is this a "new" problem? Did you not have this problem before with previous equipment in the same room? If not, did you introduce anything new into the system?

I know I'm asking a lot of questions but as I'm sure you know, it is a process of elimination.

Other things that "buzz." Florescent lighting, dimmers, refrigerators.