Possible bingo ... are you using the AT TT's built in pre-amp? That can be the source of the hum. Are you using the built-in or outboard pre-amp?
https://www.youtube.com/watch?v=4NT67ii04uQ
Rich
https://www.youtube.com/watch?v=4NT67ii04uQ
Rich
Pangea AC14XL removeable ground plug
Possible bingo ... are you using the AT TT's built in pre-amp? That can be the source of the hum. Are you using the built-in or outboard pre-amp? https://www.youtube.com/watch?v=4NT67ii04uQ Rich |
Oddly enough, Parasound puts a ground lift switch on their Halo amps. When I had the A21, I never had to use it. I used to get a very slight hum coming from the amp occasionally, and I chalked it up to flourescent light fixtures that were on the same circuit. When I upgraded those fixtures with new ballasts, the noise went away. |