Leftbass Posted November 3, 2018 Share Posted November 3, 2018 (edited) Sorry in advance re the subject if it's been covered. Couldn't see a specific thread. Used the bass attack with battery for ages. No problem. Decided to mount my stuff on a board with power supply. There's an almighty hum with the Hartke when mains powered. Can't get rid of it. Not much in my chain, wireless receiver, pitch black tuner then VXL. Any ideas please. Edited November 3, 2018 by Leftbass Sorted. It wasn't the Hartke. Thanks Quote Link to comment Share on other sites More sharing options...
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