I knew from my preliminary measurements of the H6.1 and from my knowledge of the MDT-39 tweeter that I should probably shoot for a crossover point of about 2 kHz. This would take advantage of the smoothest region of the woofer, and maintain excellent off-axis response in the midrange. The woofer and tweeter both took very well to simple 2nd order electrical crossovers, with the woofer needing an impedance compensation network. Both the high and low-pass have a quasi-third-order acoustic cutoff, crossing each other at about 2 kHz. The result is a crossover with minimal parts count, and a frequency response that has a bit of a "BBC dip", meaning that the response is down a couple dB between 1.5 kHz and 5 kHz.. This slight depression in the midrange creates a more relaxed sounding speaker that seems fuller at lower playback levels.