I've had an Ampeg b2re head for a while now. i play it with a galien krueger backline 210 cab and behringer 115 cab (supposedly 600 watts). I use a speakon to 1/4" cable for the amp to behringer and standard 1/4" to 1/4" inch for the 210. i love the sound i get out of this amp combo BUT my main gripes are the volume and the annoying buzz. The amp should be getting 450 watts but it certainly doesnt sound like that. i have to have the master more then 3/4 of the way with almost 1/2 gain to get a good band practice volume. And with the gain that high the buzz is terrible. its not a fuzzy buzz its just that buzz you get from some bass amps you know? i've tried pretty much every setting on my amp to try to get rid of it but it just never goes way. my question is, do you think it's the speakers causing this? mostly im asking this because of the behringer because the GK ran with almost no buzz out a gk BL amp with a 115 gk cab. If its the behringer then i can just replace my blown gk 115. any other ideas to what it could be?