It's pretty rough but sounds decent though my GB4x10 focus cab. The on/off switch is all mucked up. I would like to get some kind of replacement part for that...and the plug needs replacing, seems the ground prong hasn't been in place for over ten years (according to the previous owner). Questions: Can I simply replace the plug with your run of the mill grounded plugs you get at the local hardware store? I've replaced plenty of extension cord plugs this way, would this be the same? I looked inside and it's wired green to the chassis, white and black insulated connectors to the on/off switch. Second question: Is there some type generic on/off switch that I can replace that busted one with?