[DealBMW]

I'm a bit confused on how to wire the sub to my PNP harness. The harness has a 4 wire out left-, left+, right-, right+ and my AMP has an RCA connector with 2 ends. How should I splice them together? My sub/amp is Rockford P300 powered sub with hi and low input options, so I am trying to avoid buying a LOC as it's probably not needed and don't want to run extra ground cable.. Thanks!