A few months ago I bought a new single deck to replace my 2-din deck. I got the harness with the RCAs to power the amps, and only one would turn on. I swaped the RCA, the other amp would be off. How do us MACH Stereo owners upgrade our head units? I am stick of this 6 CD POS. I want a 1 DIN with gauges below it.

Any help on a new head unit install would be greatly appreciated.