Hey guys! I have one of most amazing amps I've ever had over the years. The KX series really worth it. It pairs nicely with its family including all door speakers in my 2017 VW Jetta SEL. I installed a head unit power pack and I don't want to have to run a remote wire yet again. How does the DC setting work? Curious because before I had the power back that setting would only cause engine electrical systems to disable? Is there a wiring or set up I missed?