Amp Won't Turn On

My amp and subs were working fine for about 3 weeks. Then one day, they stopped working. I unhooked the power wire and then hooked it back up, it was working and when I pushed my subs into the back of my trunk, they stopped working again! I've had people look at everything and they say that everything is hooked up correctly and my amp is still good. I have noticed that the power wire does not spark when it is touched to the amp anymore. Does that mean that I'm not getting any power from the battery?! If so, what would cause it and what do I need to do about it?! Please help!! Thanks!

You most likely have blown your fuse, check the fuses that are directly on the amp and the power wire fuse.

why would you test the power wire y touching it to the amp chassis ? That will blow the power fuse almost immediately on the first try.