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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 1 response by lowrider57

lowrider57's avatar
lowrider57
5,418 posts
 
Buzz and hum are two very different things. Transformer noise is hum and is emitted at the amp itself.

Since it's both channels try some easy trouble shooting for hum....
1. use a different AC line with no other sources on it.
2. only have one amp powered up and see what you get. Remove the 2nd amp from the system.

Most importantly, are you using a vertical or horizontal biamp? I'm assuming each speaker has it's own amp.
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