Component wiring w/factory amp & H.U.
 

Hey all. I have a leftover component set of Boston Acoustics that I want to plop into the FR-S. Right now, Im leaving the head unit and factory amp alone.



From reading, I gather the door speakers are powered by the factory amp in the trunk, and the tweeters are powered from the head unit. It looks like the factory tweeters have the choke/x-over built right onto the tweeter.


My thoughts: Im planning to leave the 4" speakers alone in the dash, remove the factory tweeters, remove the factory door speakers, use the speaker inputs from the door speakers into my crossovers, then wire the new components from there. From reading other threads though, it's hard to tell if the amp is crossing over or filtering any of the signal to the factory door speakers?


Basically, where do I want the feed to come from for my crossovers?


Any insight appreciated.

the amp does the filtering itself. so the best place to pull the signal for your crossovers is from the wiring at the tweeter.

also important to note: the signal uses 2 wires from the head unit that goes into a 4-pin connector on the tweeter. the tweeter itself shorts each pair of wires together. the other 2 wires go to the 4" midrange.

so disconnecting the tweeter will automatically disconnect the 4" mid, which is going to present a problem for what you're proposing trying to keep it.


given what you want to do for the mean time, i would recommend disconnecting all the speakers in the front, including the 4" speakers, pick up some used oem tweeters off ebay, and gut them so you can use just the connectors to get a signal into the boston crossovers.