I just got this from GC and it's acting weird. I hooked up the cab, Hartke vx215, to the head with a speaker cable and then bass to head. Even with every knob on the face turned all the way off I still get sound through the cabinet. The knobs don't seem to be responding no matter what I do with them. Only the volume knob on my bass seems to affect the level or eq. Ever heard if an amp don this?