Stereo & Electronics - Subs Problem - Help Please!

Starting Friday night, I noticed my subs would randomly stop working. They would all of a sudden stop, then randomly come back. For the most part they would stay on and cut out once in a while. Over the past couple days it has gotten worse and now it's the other way around. They stay off and randomly come on only for a couple seconds here and there. I just took out the headunit to make sure the wires were completely in, and also checked to make sure the wires were completely in on both sides of my box. When I was checking, the subs didn't come on once. It appears they have stopped working all together now.

Any suggestions on anything else I can check? I didn't put the subs in, I had ABC Warehouse install them a year ago. Anyone maybe have an idea of what's going wrong?

I just have two P1 Rockford Punches (400watts each) and a Kenwood 800watt amp. Both were a year or two old when I bought them used from a guy. I've never had one problem up until Friday. --Just extra info if it's needed.

Any help would be greatly appreciated!

Thanks

Probably the amp is over heating try putting in a coo place because when I had my amp in back of my truck it turned off.. its a safty tihng becuase if it over heats it frys...

Well, now I noticed the amp doesn't even sound like it's on. I can usually hear it...and I doubt overheating is a problem...it's been around 10 degrees here in Michigan for a while now so my car's pretty much always cold.