I won't retell the whole story, but I was in a big music store in FL a few years ago and they were having a class on doing live sound. I happened to overhear the "expert" say "With a bass you don't need to worry about micing the amp, just use a DI. But Guitar players need a mic on their amp." It was all I could do ask why I bother to buy expensive heads/cabs and do you think it's possible I want my sound heard not just for me on stage? I know it makes it real easy for them, but so would a lot of things they will never ever do.