I see a few questions about batteries. The back panel unscrews to reveal the battery connections. I missed the note about the recommended Tenergy batteries, and installed generic 9v batteries. The fit fine for me, and amp powered on. Still have major static issues, though.
iss88iss88: When you experience the static issue remove the input cable from the amp and see if it remains. If it does then it is eminating from the amp, if it goes away, then it is from your source/cable plugged into the input jack. Also make sure you're at a reasonable sound level when removing the input signal. :)