Thanks for your thorough inquiries, Tom32.
The amps have had this problem from day one, for approx 2 months but is inaudible over the music...only between tracks etc.
Actually my equipment rack is removed from the amps and loudspeakers, with a 5 meter balanced IC between my VAC pre and Gamut M250 monos.
No fluorescent lighting or dimmers.
Yes, the larger hum stays with the amp and there is apparently no change with change of room (I used a monitor speaker in room #2 as the Blades are too big to move!
I think I will send them back to a Gamut for non warranty investigation/repair.....thank you to all respondents !
The amps have had this problem from day one, for approx 2 months but is inaudible over the music...only between tracks etc.
Actually my equipment rack is removed from the amps and loudspeakers, with a 5 meter balanced IC between my VAC pre and Gamut M250 monos.
No fluorescent lighting or dimmers.
Yes, the larger hum stays with the amp and there is apparently no change with change of room (I used a monitor speaker in room #2 as the Blades are too big to move!
I think I will send them back to a Gamut for non warranty investigation/repair.....thank you to all respondents !