I wanted to show how everyone can install 4x6 speakers into the front of their TJ without purchasing an adapter and using the original enclosure and wiring. This was done on my 2003...it may be different for earlier year TJs.
Once you remove the plastic speaker grill (2 screws and the pop it off), you can remove the speaker assembly (4 screws). You end up with this.
Remove the 6 screws holding the speaker and tweeter in, and clip the wires near the back.
Push the rubber grommet through the hole and remove the pigtail.
I used my dremel to cut the plastic into a shape that would fit my Kicker 4x6 Coaxil.
Using solder and heat shrink, I connected the speaker wire to the original pigtail.
You can then install the grommet back in the hole and clip the plug on the back just like normal.
I dropped my speaker in with a bead of black silicone for a nice seal and screwed it into place.
This is what you end up with.
What's great about doing it this way is that you get to utilize a sealed enclosure for your front speakers for free!
If anyone is curious about the speakers, you can follow the Amazon link here:
Amazon.com: Kicker 11ds46 4x6 Coaxil Speakers Pair Rohs Co: Car Electronics