Full car audio system wiring diagram

A complete car audio system: factory head unit tapped by a line-out converter (LOC) that feeds a 4-channel amp driving an active front stage (A-pillar tweeters plus front-door mids) and a mono amp for a subwoofer. This diagram shows the full power distribution (single 4-gauge run to a distribution block, then fused 8-gauge to each amp), the signal path from the LOC to both amps, and the shared remote turn-on.