Maybe someone here has an idea of what's wrong with my new MB115. I've had it a couple of months now, but hadn't played a gig with it until the other night. I didn't notice the problem in the house while practicing quietly, but it was sure evident while playing the gig. Anyway, I hear an "overdriven" sound on low notes (I'd say below open D). The sound is most noticeable for some reason on the D through Bb of the A string. It's not a crackle, more like a fuzz - almost as if I have a fuzz effect on the bass. This occurs when volume is low or high - like only 1/4 way up on Gain, Boost, and Master and it's still there. Got home, tried a few different basses here, same thing - the problem is definitely with the amp/speaker. Ideas???? Thanks for any help/suggestions/solutions anyone can provide.