I got a question on amps. I've been listening to Iron Maiden a lot lately and I absolutely love Steve Harris' tone. I know he plays through a Marshall head and cabs. The guitarist in my band suggested I play with an A/B box...one signal going to my Ampeg SVT3-Pro Head with a 4x10 cab(for lows), and the other going to his JCM 2000 DSL head with a vintage 4x12 cab(mids & highs). I did it and it sounded AWESOME! So my question is: Is it bad to run a bass signal through a guitar amp? I am only using it for mids and highs, not lows. Any help you could give would be greatly appreciated. I really don't want to buy a good Marshall head and end up frying it out.