Hi, I was wondering if my subwoofer was repairable. Now, before I start off, I'm not going to lie and say that I'm some amazing professional with subs, but that's why I'm here, I guess. I figured someone on here has GOT to know a lot about subs and could help me out. The 100% honest truth, however, is that I know very little about car audio. I simply hate the fact that my sub isn't working correctly, so I took it out, looked it over, and decided I wanted to fix it. I tried looking for ways to fix it on the internet, and found this place, and thought someone could maybe help me out. I have a JL audio 12W3-D4 Dual Voice Coil Subwoofer. It came in the truck that I bought off of my friend. The truck is a '95, so I'm very strongly assuming that the sub is newer than that. The problem is that it makes a popping sound whenever I get my sound to -20dB or above, and sometimes much lower on some songs, depending on the base levels in the song. The only time I hear it is when the song makes a thump - it's fine on sounds like low rumbles, etc. I know it's attached to Punch 600a4 amp, if that helps at all. When I took it into a shop certified to deal with JL audio, they listened to it for 5 seconds, said that it was the voice coil, and assured me that the only course of action was to throw it out and buy a new one. Well, I'm a cheap person, and I'd rather repair this than buy an all new one. If anyone could either show me a tutorial on how to fix it, be willing to help walk me through some simple (or, if you're willing, not so simple) steps to fix it, or simply explain to me why it's gonna be pretty darn near impossible to fix myself, I'd really appreciate it. I'd just ignore the problem, but to be totally honest, it's getting difficult, because the thing seems to be getting worse as time goes on, and I don't want to hit some point-of-no-return in terms of repairs. Thanks for any help you guys can give me!