Alright i have an SWR 2004 head and a hartke 1*15 transporter cab and all of a sudden when i try to play them you can barely hear the bass. I have to put master and gain all the way up which i usually never do in order to hear it well with my band. However, the power shut off on my house while i was playing my amp the other night, would that have any effect? I'm sure its not my bass because i was playing it on a different amp and it sounded fine. Any advice would be greatly appreciated!
Check the power fuse on the back of the amp. maybe take the fuse down to your local radio shack or hardware store that has fuses and just buy a new one and see what happens. fuses are probably less than a dollar. you might have a half blown fuse.