Mustang '04 Conv - Mach460 Premium Sound Head Unit replacement

hey there jeff,

when you use a harness it will use the amps. that means that it will already separate the tweeters and the subs. If you bypass the factory amps you will have to use a x-over. or just use a head unit that has one. and since yours doesnt you may need some. if you can, get some component speakers. that way you can separate your highs from your lows, a perfect upgrade for a mustang.

I have used the 70-5521 harness for the 2004 mach system, and there is no need for low pass x/o for the "subs", because they aren't actually subs. They work/sound fine playing full range. You will need to use bass blockers on the main harness for the tweeters as the factory radio has them built in for the tweeters. You will also need to install a 1000-1500 ohm resistor on the remote turn on leads on the smaller harness to prevent the 5x7"/6.5" speakers from popping when you turn the radio on. On a side note, I assume the reason that you are planning on using the Dual deck is because of the built in HD radio and/or the USB input? I work at a shop that sells them and although they are rather inexpensive, the product line lacks the quality of even the lower priced models of the "name brands" such as Pioneer, Alpine, Kenwood etc. If you want a deck that is low priced and has a built in HD tuner the JVC KD-HDR30 is a much better unit IMO. Just my .02 cents.