I recently bought a Tanglewood Rebel 4K and a Carlsbro Bass Beaver amp, both second hand from a reputable dealer. The rig sounds fine apart from this, but quite often (every few minutes or so), the amp will suddenly cut so that I can hardly hear the sound (the sound is still coming out of the amp but really quietly). This continues for a short while and then sorts itself out. Switching the amp on then off also restores the sound. Does anyone have any suggestion as to why this might be happening? If so is there any way that it can be fixed, or should i just try and get my money back? Any help would be greatly appreciated, cheers.