Hey everyone. Just wondering if anyone can tell my why my LH1000 seems to be hissing. I'm running it with an Ampeg 410HLF. It seems to be when the highs are up, or the bright is on. When I kill the horn on the cab, the hiss goes away, but the tone is awful. I tried a quick tube replace, and it didn't help. Someone mentioned that if I don't plug anything into the input, and the hiss remains, its an amp problem, not a cab problem. That's what I did, and the hiss sure enough, was still there. So can I rule out the cab? I also tried turning off the dimmers, different basses, and yes, even a bunch of different cables, most of them brand new. So I'm thinking I can rule those out as well.