Speaker buzz with SS amplifier, input disconnected

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.

Most amps will make some kind of noise when there inputs are disconnected. When you reconnect the inputs is the noise gone? If gone there is nothing to worry about
Alan

The noise through my Blades is unchanged with inputs connected or disconnected to the Gamut monoblocks. It is more of a buzz than hum, and is audible about 3 ft from loudspeakers. Speakers are not biamped and noise persists when plugged into power conditioner, DC Blocker or
cheater plug used. Can an amplifier itself transmit buzz into a loudspeaker?
Gamut claims it must be dirty AC, but I don't believe this to be the case?
When I use my tube amplifier, no hum or buzz evident.
Thanks again to to those responding.
Brian