A little background: The car is a 2004 Mustang Coupe with the Mach 460 system. The head unit is a Sony GT565-UP. I also got a dash kit and the appropriate wire harnesses from Crutchfield (#120705521). When I went to solder the wires from the head unit's harness to the Crutchfield harness, all the colors matched except for one pair... the HU has a blue/white striped wire called "remote antenna". The larger of the two Crutchfield harnesses has a solid blue one called "power antenna". I figured they were the same thing and hooked them up. The HU works fine, but it seems like there is some sound "missing". The smaller Crutchfield harness has one pair of RCA jacks which I plugged into the SUB/REAR audio out like the instructions advised, and then two blue/white striped wires that are just open wires with no connector of any kind. I have no idea what these are supposed to connect to, but they're for the amps, and I'm pretty sure I have factory amps in the car, so I feel like it's necessary they hook up to SOMETHING. Did I screw up connecting the blue/white stripe from the HU to the solid blue on the Crutchfield harness? I'm assuming this is the root of my problem and if I can get these amp wires connected, the sound will be much improved. Any ideas??