(No pics, sorry.)
The Infinity Kappa 62i's were purchased used on Craig's List for $30/
pr. These are two-way 6.5" speakers and I installed them in my 08 Fit Sport yesterday.
First I removed the door panels and removed the speakers from the doors. BE CAREFUL HERE: I needed to re-use part of the factory speakers/mounts, but in removing them I messed one of them up and had to reinstall it with silicone goop instead of snapping it in factory-style. You want to remove the factory speakers by suavely popping out the top clip with a screwdriver, not by snapping off the hooks at the bottom like a dumbass.
If anyone has a factory speaker they'd like to get rid of so I can try it again I'd appreciate a PM. Thanks!
Once the speakers were removed I hacked them up as follows:
I sliced through the rubber surround to free the cone at its edge. Then I cut apart each leg of the basket which is plastic. This allows you to remove the cone and magnet, with just a ring with the snap mounts left. Finally, I cut the speaker connector free from the basket/mount assembly, and cut the wires to it.
I soldered a short wire pair from the Infinity's terminals to the connector, preserving the polarity (Infinity + to Honda Green/White, Infinity - to Honda Green/Black. That's the Left speaker's color code, I forget what it was on the other side.)
I also replaced the crappy electrolytic 3.3 uF crossover cap with a polypropylene film 3uF I had in my parts bin. I did the same thing to the tweeter, in the door panel. Those electro caps are easy things to change with a big effect on the sound IMHO. I hot-glued the caps to a surface nearby when I had them soldered in.
I sliced the factory basket/mount at its edge so that it was flush with the surface that originally held the edge of the cone, scraping off all the remnants of the original cone surround as I did so. I drilled four holes around the edge to accept cable ties and I cable-tied the Infinity speakers into the factory mounts.
Snapped everything back together (except I had to glue in the one I messed up) and it's all sounding great. I backed off on the treble to -4: this setup now has TWO tweeters where the stock setup had ONE, and there is too much treble now. I'll be checking out the sound with the factory tweeters disconnected, too, I'll report in on that at some point. Much more detail thanks to all the tweeters, but also an improvement in bass articulation and clarity.