Originally Posted by GradeA_TireFryer

please - if you looking for a sound quality or even spl system, buy a unit with high prevolt outs, this will keep you amp gains lower and should get a little more volume out of your system.

If it only had 2 sets of rcas, but today most 4 channel amps have a output - do all 4 inputs and then use the output to your sub amp.