Howdy, I have a GK 1001 RB head, and I just recently purchased it from a good friend of mine. Now for some reason after a few min. of playing, the volume gets very low, and then just dead, you can't hear anything. If I take the cord out of my bass and tap the top of it, you can hear the annoying ass buzzing noise coming through the cab, But it's as if it's not getting the signal from the bass, I talked to my friend whom sold it to me, and he said that he'd never heard of that. So I get to send it in and hope that someone can fix it. I'm rather pist of cuz I just F***in bought it. If anyone has any ideas of how to fix it or what might be happening, and any info on who to go to. I would be very very appreciative. Thanks again. Nick.