I'm about to put a sub& in my otherwise stock BA system.my amp has hi inputs,so i plan to just tap into the rear door after amp wires. My amp has a 5 wire high input, ch 1&2 pos & neg, then a signal ground. What is that for? I have always used RCA's off aftermarket headunits to power my subs in the past,so I'm not sure.Is this for shielded wires? Sorry if this a dumb question, i'm using stuff i've had around for a while and dont have the instructions to follow
Thanks for any & all help!