I replaced the amplifier in my intrepid and ever since then it cuts off at a medium volume, the amp is for a infinity sound system but I have the premium, I'm confused because at a medium volume the stereo will flicker and reset, any ideas? I have the stereo as well that came with the premium amplifier but I will have to buy a conversion kit for it, would that fix it?

(all amps and stereos mentioned are stock)

 

Probably a bad amplifier.