Getting the picture
- My Satellite Setup
- 5 W, 9-13-19-28 E
- My Location
- Bergen, Norway \ Alpes Maritimes, France
Short the power amp inputs to ground\amp chassis.I get the noise with and without stuff connected to the amps.
And try grounding the amp chassis to a known good ground point.
Like this the amps should be 'quite close to' completely silent (even if using headphones), in case of vintage equipment maybe just some low level, stable & quite unobtrusive hiss.