Like many of my designs, this crossover is an exercise in simplicity. It almost turned out to be a four-element design, which actually modeled and measured better, but listening tests revealed sound quality inferior to the five-element design. Particular attention was paid to the vertical and horizontal off-axis response so that the design would work well when the drivers were oriented either vertically or horizontally.

You will notice the on-axis response is somewhat a departure from my normal designs in that it exhibits a rather broad dip between roughly 2 kHz and 6 kHz. This is due to the response of the Dayton Classic tweeter, and compounded by the narrow 6-1/2" baffle width. While this appears somewhat sub-optimal, in practice it sounds remarkably flat. Considering the crossover topology, I suspect the dip fills in off axis. The second order electrical filter of the woofer emulates a third order BW acoustical transfer function at 1200 Hz. The tweeter resembles, at least for a portion of the transition band, a fourth order LR at 1450 Hz. The impedance is quite high with a minimum of about seven ohms, and an average around eight ohms. Phase tracking is fairly good through the crossover region.