I was assuming the kenwood was for the sub. If it is for mids and highs you will need to find which wire goes where from the output of the factory infinity amp. I don't remember which wire is which but the output harness is the one with the most wires. The fronts should have a crossover installed for the tweeters since the factory amp has one built in. You can use a AA or AAA battery to safely test your speakers without doing any harm. After all wires are found and hooked up, test your phasing by fading to front and moving your head evenly in between both speakers(basically just lean over the console a bit); if the speakers are in phase you will hear good bass response out of the speakers. If they are out of phase the. The bass response will be a little muddy and almost non-existant. I they are out of phase switch the positive and negative of one of the speaker leads, it does not matter which one. Repeat for the rear.
The headunit should go right in using the factory radio harness without issue if you use the Chrysler harness with the RCA inputs for the speakers. This harness will feed the factory amp with the low level input signal it needs to operate like it does from the factory
If the kenwood amp is for the sub then you should run it off of the sub pre-out from the alpine. It won't need anything from the factory amp unless you were adding subs using the factory radio, then you would need to use a test speaker to find the rear woofer wires that are already crossovered at 80hz. Let me know if I missed anything or if you need further help.
Reply With Quote