The credit for this crossover design goes to Mike Van Den Broeck from PE. Thanks to Mike for taking time out of his busy week to help me out.

Due to the unusual baffle design in this project the crossover is a little on the extreme side, with eighteen components per speaker. The nature of the tweeter placement caused a huge null at 3kHz, and after playing around with it, we realized that a much higher mid-to-high crossover point was needed to eliminate this problem. This was, however, the biggest problem we came across. The XT25 and the D8G both use a third-order filter, while the F5 uses a second-order and a notch filter to help decrease the natural 1.4kHz peak. After a few days of getting lost in caps, coils, and alligator clip test leads, we measured it one last time and it was perfect. I used standard 18-20 gauge Jantzen air core inductors, and Dayton caps and resistors.