I've finally splashed out and bought a GKMB150s, which should arrive in the next couple of days- very exciting! But my question is ... will it damage the amp in any way to play guitar through it? At the moment I lend my old guitar amp to the guitarist in my band for rehersals, but as I never play guitar these days and rehearse acoustically at home I'm wondering if I can get away with selling my guitar amp and letting the guitarist use my GK. Any thoughts?