on my ampeg pr-410hlf... One the speakers blew, it's making a horrible crackling noise now. How would I go about getting a new one? What's my best bet, to buy a different brand one? It's a really deep speaker, I'm not sure what to do. Thanks edit http://accessories.musiciansfriend.com/product/Eminence-Legend-BP102-10-Bass-Speaker?sku=660086 something like that maybe? Just swap it out? What kind of work do I have to do?