I know I've run into the question on where the crossover between the woofer and tweeter is many times while browsing this forum, and I've never seen a definitive answer. Since I've been playing with the idea of replacing my tweeters lately, I thought it was best I find out for myself. I have a nice set of "test tones" that I downloaded a while back while troubleshooting the system in my old 944 - It's basically just 15 second loops of specific frequencies. So all I had to do was play different freq's until I found the switch point...

My results were as follows: The woofer played up to 1KHz, and the mid/tweeter played from 2KHz and up. I could not pinpoint the exact crossover because I didn't have anything between 1k and 2k, but I hope that this information helps. To put it into perspective, most of the aftermarket tweeters I've seen supposedly don't reproduce down to 1k (though I've never actually tested them) - This means you may end up with a hole in the reproducible frequency spectrum of your system if you only replace tweeters.


NOTE: These results were obtained on a '05 H/K stereo system, which has a differently designed tweeter than the non-H/K system. Your results may vary.

 

Thats very interesting, although, it would make sense to me that if you are replacing the tweeter, just do the whole component system for the fronts.

 

Yes, and this proves why. Personally, I'm of the opinion that the H/K can't really be improved on without a total overhaul - I was just playing with the idea since my tweeters occasionally go all funky on me (dealer marked it up to bad source, so no free replacement for me )