I've been having this on and off problem with my bass drum mic howling and causing my PA to make a high pitched screech and go into clipping. Months ago, my friend stuffed two pillows in there and it has stopped considerably, but I was wondering if there was a "less tacky" way of doing this. I am assuming the howling was caused by the resonance; because the sustain would continue to play in the speakers forever. Don't get me wrong, the bass drum sounds great now, but I want my gear handled properly, if there is such a way. The mic is not a bass drum mic, I don't know if that really matters.