Hey everyone I have a Ampeg SVT-3PRO Head going into a Ampeg SVT-410HE Cab. And I turned the up the gain all the way and adjusted the volume with the Master Control "Someone on here Suggested I do that" but the head keeps peaking out. I have a dial on the back of the cab and I have no Idea what that controls I think it may be the reason my head is Peaking. Anyone with suggestions or help?? Thanks