2. amps-preamps
  3. 1422404669

Speaker buzz with SS amplifier, input disconnected

If a buzz/hum is present from my loudspeakers with solid state Monoblock inputs disconnected, what are the likely possibilities accounting for the buzz. Do toroidal transformers ever transmit transformer noise to the loudspeakers?
I thought ground loops were more or less eliminated with amplifier inputs disconnected. Buzz/hum is present in both loudspeakers(with inputs disconnected), more pronounced in one. Thank you for your suggestions!

Amplifier. Gamut M250
Speaker. KEF Blade
audiobrian

Showing 2 responses by atmasphere

atmasphere's avatar
atmasphere
11,633 posts
 
This sounds like an internal layout problem to me. It is true however that with an open input (nothing connected) that there will be a greater amount of noise present. But that should be gone with your preamp connected.

Now one exception may be that your interconnect cable is responsible for some of the buzz. So it is a good idea to try a different cable before blaming the amp!
atmasphere's avatar
atmasphere
11,633 posts
 
Would you kindly expound on the type of layout problem which might result in this speaker buzz. Can a noisy toroid transmit buzz to loudspeakers etc

Generally a noisy power transformer will not cause noise in the audio path as well. But there can be AC line problems that can cause both noise in the amp and mechanical noise as well. Sometimes it can be confusing to sort them out.

The fact that one channel is noisier than the other is a clue. Without knowing any more about the amp I can't say more about layout, but that is what it suggests to me. IMO the amp should get checked out.
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