So.. I played this amp yesterday at GC and loved everything about it. When I got it home, everything changed. With every knob at normal levels, the volume is LOW - you can barely hear it. The volume and master are maxed - it only gets louder if you crank the bass. The amp is used, so I have 30 days. Is there something wrong with it, or is that how you adjust the volume on it? Did it crap out from the time I left the store? Does their outlet have extra juice?! With settings like this, it should be quite loud - correct?