As mentioned above, due to the response of the B4N and the Fs of the tweeter, I decided on a 3KHz crossover point, using a 2nd order Linkwitz-Riley filter. An impedance equalization network was added to the woofer, and the tweeter was attenuated by 5dB. To keep the drivers in phase, the tweeter polarity was inverted. The system impedance was around 11 ohms at the crossover point, and varied between 5 to 8 ohms. All series components are Dayton metallized polypropylene caps and Jantzen air core inductors.