So I let another band use my amp a few weeks ago at a gig, my Ashdown MAG 300 15 combo. He obviously pushed it too hard as when I got it back and played it, it farted out notes. At low volumes it sound like queen of the stone age distortion, but nasty. When I play through my pc using the line out the sound is fine, and when I hooked it up to another speaker it was fine so it must be the speaker that's damaged. What can I do about it?
