Buzz from speakers

A little bit of hiss is normal. You describe a buzz. A hum is not normal. Sometimes you get a sort of light buzzing noise from certain components,
but that shouldn't be coming through the speakers. I used to have a low level buzz in my system until I installed 20 amp dedicated circuits. Now, my system is stone silent, except if I put my ear up to the tweeters, I can hear a slight hiss. I guess the answer is -- you've got identify whether you've got normal hiss, a ground loop hum, or if one of your components -- your amps -- has a slight buzz. If the "buzz" is coming through the speaker, you could have a problem. My "buzz" wasn't coming through the speakers, but it bothered me -- and the dedicated circuits cured it.

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.

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