Stereo questions...

It has RCA outputs. Which brings up yet another question. It's a four channel radio. It has both high and low level (RCA) outputs. BUT, it only had TWO RCA outputs VS four high level. What's the deal there? Can I somehow convert it to a four RCA output? Or do I need to? It seems if I use an amp then I wouldn't have front to rear fader ability with only two RCA outputs.
It has 2 sets of RCA outs?
One for a 4 channel amp for your mid bass 2 ways -articulation-you wanna get those..and the other set of rca for the sub behind the back seat so that exhaust doesnt drown out the bass.