Originally Posted by Guard Dad

Yea, I'm using the stock head unit, no external amp for now, maybe never even. Your suggestion has merit, doing it your way I would use the factory tweeter cable to feed the crossover and then run the cables from the crossover to the speakers. Your way might be better than mine actually.

My first audio mod was to add a rear speaker to my dad's 65 Mustang's AM radio. Later I added a reverb to the rear speaker, in 1966 that was a hot system! It was another couple of years before I could afford to add a Muntz 4 track tape deck with front and rear stereo speakers. Never did get FM on that car. You ever seen a wiring harness on a stock 65 Mustang? Nothing to it! The Z's doors have more technology in them than that entire Mustang had. The stock (transistor!) radio had an antenna lead, a single hot power lead (chassis ground) and two wires to the speaker, now that was a system in May 1964 (most new cards did not come with any radio standard and just an few years earlier tube radios were the norm) when he purchased the car new. You probably figured out by now that I'm a lot older than most of the folks on this forum. Still love cars though.