Okay. I just wired up dual battery, interior light, back up camera, amp and sub amp. Everything is working good. But where do I send the RCA's from the subwoofer amplifier? My primary amp has output jacks and my Bluetooth controller only has one set of RCA's. Do I need an RCA splitter at the Bluetooth controller? It powers up and my remote switch is to the controller and I have a good ground. Thank you. The forum has been very helpful. I didn't have one fire