I play music probably moderately loud, and for moderately long lengths of time. No, I think what blew the speakers was the guitar playing. Though some purists may cry "Heresy!", some of the digital guitar simulators I have sounded, and more important, felt really nice through my integrated MacIntosh MA-230 (SS pre, tube power amp with, you guessed it, 7591A) and the Heresys. Though I didn't play it super-loud, the peaks from a guitar are different and higher than that of recorded music. Serves me right, I suppose. Thanks for the suggestions; I'm glad to know that the parts are readily available. I can solder, and will replace the parts myself. This was my first post to the Klipsch BB, and I really appreciate everyone's help.