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yea but this is only when the lead bright switch is on. ill try tightening it anyways though. thanks

ok maybe my amp is just screwed up. i tried turning down EVERYTHING to 0 except the volume and master. it still makes the humming. I might have to bring it in to a shop

Hey guys, i just recently got a Mark IV and i couldn't be happier about it. But i have some questions regarding the amp. I did read the manual all the way through so dont bother asking me that. So i know that as the volume gets higher and higher it is not advised to turn on the lead bright...