xxjohnboy Posted October 2, 2018 Share Posted October 2, 2018 I made a video of the problem. I've changed power boards, power leads, speakers, guitar cables, pedal boards, guitars. The noise is caused by the helix for sure. Anyone know why? Quote Link to comment Share on other sites More sharing options...
PiFromBRC Posted October 4, 2018 Share Posted October 4, 2018 Ground loop. Check your lift button on the back of the unit. I find that doesn't help in my HS where everything goes through a single Furman, so I bought an Ebtech Hum Eliminator. That works like a charm. Good luck. Quote Link to comment Share on other sites More sharing options...
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