ok trying to hookup an all in one subs and amp in the back of my xfire the rear stock subs suck so want a little more bass also hooking up new stereo, stereo is hooked up and running no issues with the stock amp, ok thought i would ran an another all in one small amp and sub, ran the wire to battery and ground and remote wire no problem amp powers up green light ran rca cables to new stereo ok problems begin where do i plug in the cables to the stereo there is one plug that says woofer out but only one where does the other rca cable go. ive tried plugging cables into the jacks for the two front speakers, amp is running but no volume can hear it alittle bit, do i have to run the amp to the factory amp? i even tried hooking up to the rear subs no luck, i just want to have a seperate sytem but cant seem to figure it out , need help lol