Just got back with 2 new 12 inch PR memphis subs and a poineer 760 watt amp, went to hook it up but it wouldnt punch. I pulled my Headunit out, which is pioneer, to make sure everything was hooked up, just checked it quick. turned my car back on and my headunit wont turn on, no power or anything. I checked all wires and re crimped a couple loose ones, other than that nothing has been changed. I checked the fuse on the back of the unit and its fine... Any ideas or suggestions please!