SUB STOPPED WORKING!!!, AGAIN!!! Options

[acenova]

Alright, I'm irritated. This is the second sub I've gone through, the exact same kind as my last one to. I was just driving down the road listening to Lloyd Banks-on Fire and all of a sudden the base dissapears. Now, when I stopped the car, I checked the amp, and the amp was still on so obviously my sub blew or over heated. I highly doubt the sub blew because that sub can take quite a beating and is pretty Powerful. It's a MTX Thunder 8000 12". IF someone knows more about it and disagrees, please lemme know so I can beat someone up. But seriously, I think it's underpowered, making it over heat but I'm not sure because the amp is pretty powerful as well and should be able to power it just fine. Do you guys know if high heat, like outside temperature, can possibly mess up the sub? Personally I'd think that any heat would affect the amp before the sub but I could be wrong. My amp is fine, but my sub is messed, hopefully you guys can help me out w/ this one because this is the second one I've gone through.

[subsolo_21]

Several possibilities here. I've experienced a ton of probs w/ this in mine and my friends systems.
1. Amp is overheating or going into safe mode
2. Loose ground or grounded to a bad surface, such as painted or nonconductive surface
3. Loose speaker wire. (check connection @ amp, contacts on box(inside and out), and contacts on the sub itself.
4. Blown sub- to know if its blown just take the sub out and see if you see any cracks in the coil or broken wires. You could also hook up the sub to a system that you know is working and if it plays ok then its not blown.
5. Bad RCA wires/Jacks-check for secure connections @ headunit and @ amp.
6. Headunit itself could have a problem, doubtful, but the outputs could be messed up due to a broken wire.