Hey man. I am a semi professional musician and I can tell you that playing a guitar through a bass amp will not hurt anything. It will sound kinda crappy but you can even run your fx though it if ya want. I had to do this a few times at shows when i had amp trouble. But you definately dont wanna plug a bass into a guitar amp. The lower frequencys of the bass will obliterate the speaker and sometimes blow the power amp. Hope this answers your question.