I play through a Ampeg BA115. I have had this amp since christmas and its been giving me great tones and enough power for everything. I got a 5 string about a month ago and today I'm having the amp distort and rattle and cut in and out. Any one have an idea ? I've praticed with it in my room at 2 and play a drum machine through it, but the manual says the amp can play cds and aux equiment. I don't turn the drum machine up at all. Please help