Hey guys i have 03 explorer that i put an aftermarket radio in and it has the factory amp and subwoofer. Do any of you know if the amp runs the door speakers as well as the sub? The instructions for harness with the rca's said to only use the white rca cable and listed only 3 cars that would use both the red and white. The reason i ask is because when i turn the volume up to about 30 it cuts out which makes me think the factory speakers are cutting out do to more power or something is crossed. I have the door speakers wired direct to the stereo harness and and using the white rca for rear sub maybe i should just be using the power wires on the harness and the rca's run all speakers through the amp. I know its not a stang but figured some of you guys might know do to working at a sound place. Thanks in advance for any help. It's appreciated