It can work, but it looks like you have tried it. Bass rigs can be too frequency focused to be a really great guitar rig, but some can pull double duty. The peavey rig I just got, can be a beautiful guitar setup. The cab is really shallow. I think that is the thing for guitar. Cabs that would be good "bass" cabs, can sometimes muffle the frequencies guitars live at. It all depends on the cab and EQ.And will this harm my 400-RB if I do this? I know you're not supposed to do bass into guitar rigs, but is vice versa okay? I just tried it for a second, and it sounds OK, but my buddy's guitar rigs definitely sound better for guitar (whoda thunk, right?). Anyway, even if it might work and be ok, I think I'd prefer an amp designed for the instrument. And more research tonight about the Peavey Supreme sounds promising. Might snatch it up and wait for a good cab to match.
Oh, and it's a total bass rig. GK 400RB-IV into GK Neo 410. Didn't use a guitar cab or anything if that matters...
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