I have the factory Infinity sun and sound package w/subwoofer in my '04 Ralliart.
I want to replace just the head unit for more features, getting one with 2 sets of RCA pre-outs. The Metra 70-7003 wiring harness adapter seems to be the right one for keeping all the stock amps/speakers but what about the factory subwoofer?

Will this harness adapter also keep the subwoofer working?

Thanks.