I have a MarkBass CMD102P 2x10 combo which I've owned for a couple of years. I also play drums, and have started using some electronically generated sounds and loops in my playing. Yesterday, while experimenting with my rig at home, I used my MarkBass to amplify some cowbell and tambourine sounds via my drum pad. After a few minutes, the treble frequencies suddenly disappeared. I fear I may have blown the tweeter. Does anyone know if there is a fuse or other protection circuit that may have blown? Or how I could otherwise verify whether the tweeter is indeed kaput? If so, where could I buy a replacement? Thanks!