Hi all. Sure it's been covered loads before but I cant find my answer. I'm upgrading the sub in the boot to a stealth in the rear side. The amp I have has hi level input but I also have a LOC to run RCAs. Which is preferred? I have the Audi sound system which gives me control of the sub through the mmi which I would like to be able to keep. Will this still work properly if I tap into the standard sub wires? With the LOC do how do i wire this to the 2 sub wires as it has 4, do i do a pair or + and pair of - or just 1 of each? If doing hi level input how would I wire this in also?