Is the main reason to use 500Hz xo frequency to reduce the harmonic distortion of the mid/tweet by keeping its displacement very small? I have tried 400Hz and 500Hz xo's and find them more pleasing to the ears than 250Hz or 350Hz. Is the answer simy less distortion? Also, it lets a large cone woofer do the heavy hitting with the upper bass "punch".
The answer appears to be less IMD. I've put more plots up that show reduction of IMD with increasing crossover point.
I only listened to Norah Jones but I had them in order E, C and G. Surprised to see C was the Fostex since I typically don't like Fostex drivers. Might have been different if I had listened to all the tracks.
Well, you can skip to the answer key given in Post 1 to get to the results and read up on the drivers you are interested in at your leisure. Use the search funtion to look at only the drivers you are interested in.