Hello everybody. I have the lh 1000 head running the hydrive 410 in bridge mode and I absolutely love the tone and everything about this rig. I did a few gigs with it, I have it about a month. But yesterday at a rehearsal it started to make some vibrating-like distorting noise on the low notes. I play a fivestring. I think it is loosing some power and articulation too. Now I am on to change the preamp tube first, but I am afraid it is one of the speakers... What do you guys think? BTW my guitar player was messin with it when i wasnt there but he told me he didnt pushed it hard past 2. I know, I know ... gui****s. Sorry for my poor english, i am from slovakia.