I put a set of Pioneer 3-way speakers in my Infinity equipped KJ today. I basically went by the how-to thread that SabaII did on his with a couple of minor tweaks...
http://www.jeepkj.com/forum/f201/how-infinity-speaker-replacement-51819/
Instead of using 1/4" holes to mount the amps in the doors. I used smaller machine screws so I didn't have to drill out the amp holes, just 3/16" holes in the doors. I went with 2" long, but 1 1/2" would have worked. I also used a couple of 1/4" nuts for spacers instead of stacking washers. Either way, both got the same results.
The funny thing is, my right front door speaker was not blown like I had thought. When I pulled the lower part of the door panel away, the stock speaker screen fell out. So, I think it was just lying in there against the speaking making a rattling noise.
But I had already put the left front in, so kept plugging along. When I got to the rear doors, I didn't realize they weren't "amp'd". So, it was a bit easier. Someday I would like to change the head unit, but not sure what all that will involve. The front speaker amps had TEN wires going to each one! No clue why.:shrug:
Here are a couple of quick pics....
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