We now have a final impedance and frequency response for the potential tweeter and the same for the woofer. We use the measured impedance in the box for both driver and the measured on-axis response for the tweeter (gated appropriately). We use the spliced / merged frequency response of the woofer (merge the nearfield woofer and port then splice the gated response).

At this point we care about the crossover and the sound. Crossover design, more than any other part of speaker design, is an art as much as a science. You will find that literally an infinite number of crossover produce a chart that looks good. They all sound different and you want to pay attention to what makes them sound different / better. Here's the way I do it...

First, here's a picture of the front of the prototype.

Click the picture for a larger view

To begin with we examine the charts of the two drivers. Here are frequency response and impedance charts.