One of the first things I did when I got the 4Runner was change out the audio system. The speakers I used in the fronts were high end speakers but they were about 15 years old. I decided to try out some new tweeters to see if there would be a sound difference.

I picked up a set of Infinity Kappa 10.9t on Amazon for about $50.
Let me begin by saying, if you have you have never messed with car audio equipment before, these are not a speaker I would recommend messing with. These are very difficult to work with and probably the reason they have been discontinued.

Sound wise, they are an excellent speaker. The highs are much brighter that the Boston Pro tweeters I pulled out. They are very clear and provide very nice high end details. They are an excellent replacement for the stock tweeters, as they are extremely efficient with a 93dB sensitivity and 2 ohm rating.

They fit well in the dash openings with no modifications and are a fairly easy install. The reason I don't recommend them for a novice, is that for some sick twisted reason, Infinity decided it would be a good idea to use a set screw with an Allan wrench about the thickness of a mechanical pencil lead. The reason this is an issue, is that once you get moderately close to tightening the set screw down on the wire, the wrench strips out which rounds out the set screw. It is a really bad design.

I would think I had it tight then the wire would fall out. I managed to get it tight enough to keep the wire in place, then zip tied the wire to the bracket to hold it in place. I have the feeling after a few off road trips, I will have to pull them out and solder the wires in.

The other issue is the size and design of the crossover. It is fairly large for a tweeter crossover, but they didn't provide covers for the set screws so they are exposed. If you don't protect them and shove the crossover into the dash opening, you could easily short the terminals, which could short your amp or head unit. I added some foam weather stripping to the top and bottom side to keep it from rattling and to cover the set screws.

The driver side fit well just using a mounting bracket on the underside of the stock bracket. The passenger side did not as the speaker still sat too high. I had to find longer bolts and use two nuts as spacers to get it to sit low enough.

So while it is a great sounding speaker and an excellent price point, I would say stay away unless you are comfortable with modifying a brand new speaker.

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