I'm having some trouble with my setup. I have an Iamp 600, going into a EA VL-310 The 310 sounds distorted when I play through it. This was a sudden occurrence. I did three gigs with it this weekend and it was fine. I plugged it in to practice yesterday and it sounds distorted...particularly on lower notes on the E and A strings. It's almost a sound like when your active bass' battery goes dead. To make sure that wasn't the case, I tried the bass in an old Hartke combo I have...and it was fine. I also put the Hartke head on the EA cab and the distortion problem returned. So I've eliminated the bass and EA head as problems. I don't see how I could've blown a speaker on the cab since I don't think I've ever had this thing even up to half of it's full power. I'm yet to contact EA on this, but just thought I'd throw this out here to see if any of the experts have any idea what might be going on with this.