Hi I'm new on here and have searched and searched and have had no use finding a solution to my problem. I have a 2004 limited edition crossfire. It came with an aftermarket Kenwood KMR-D562BT stereo and is hooked to the stock amp which powers the front and rear speakers. I am trying to install a new stereo to add a 10" subwoofer in the back just for some more bass. I have installed many stereos before. I ran my rca cables from the SW RCA slot on the head unit to the amp, I ran the ignition/remote wire to the amp, power from the battery with a fuse, and grounded it. The amp turns on fine and I have speaker wire for the sub. Everything is hooked up and connected to the best of my knowledge. The problem I'm having is that the sub I added is not working. I've tested and know it is not faulty but I have no idea why it won't turn on. Do I have to piggy back of the stock amp, can I even add this extra amp? What's the problem I'm not seeing here?