I want to hook up a sub in my car but this is the first time iv'e ever done it so i need a little bit of guidance. I have an amp, Alpine MRA-F350, in my car that powers my speakers and it only has one RCA for a sub output. I have another amp with the sub i have that i think i should hook up also 'cause it has a bit more power. How do I go about hooking up the two amps? Or would it be better for me to just go with the amp I have already?

Thanks