2. amps-preamps
  3. 1411822537

"Buzz" Coming Through Speakers

I have a Audio Research SP16 tube preamp. I recently noticed that without any music being played (or during quiet music passages)there is an irritating "buzz" coming from the speakers. Since the tubes had considerable play time over several years, I replaced the tubes. However, the "buzz" continued. In the past, changing the tubes resolved the problem. But not this time.

I would appreciate any thoughts you might have. Thank you so much.

Kit
kitjv

Showing 2 responses by kitjv

kitjv OP
69 posts
 
I assume that you are referring to the plug on the power cord of the preamp. If so, you would be effectively eliminating the grounded prong of the plug. Correct?

I am curious how this might resolve the "buzz" problem since the problem only started recently. Thank you.
kitjv OP
69 posts
 
The audio system is plugged into a general lighting circuit. With all lights in that circuit off, the buzz persists. So a dimmer switch is assumingly ruled out.

I unplugged (one by one) all of the audio/video components plugged into that circuit. The buzzed ceased only when the preamp & the power amp were unplugged.
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