Yesterday after I had finished watching a movie, I left my receiver and external amps (which drive the woofers on my front speakers) on, but with no signal. Perhaps half an hour later, I smelled melting plastic. I had no idea what was happening so I turned everything off and disconnected it. I touched my receiver and amps, and I found the amp driving my left front speaker was sizzling hot (this is 15 minutes after it was turned off). So I assumed my amp was fried. Today, I decided to reconnect my main speakers without the woofer amps, so I would power them only with the receiver. I expected the bass to be weaker, but it was really pathetic. I discovered the front left speaker's woofer wasn't moving at all, so I took the grille off and noticed the dustcap was melted. I took the woofer out, and I think I'll see if I can buy a new one or have this one repaired. Anyway, my question is if anyone has heard of anything like this before, or if anyone has any idea how to determine if it was the woofer that was bad or the amp? I have some reservations with hooking the amp to my other speaker to test it out, that's why I'm asking.