Since I now have some confidence that the Edge will give results that are consistent with measurements, I decided to actually “design” a baffle this time. It’s basically rectangular, 40cm wide and a meter tall, but with the top corners chopped off. The tweeter will sit just above the baffle in free air. Here’s the shape of the baffle and the positioning of the woofer:

Here is the simulated response, with the microphone in the center of the baffle, at 1m height:

The center of the woofer is 57 cm off the floor. (The interesting thing about that is that the “best” woofer height depends on the microphone distance. With a distance of 3m, which is more likely to be the listening distance, the best height is 53cm.)

The midrange driver is located as close as it can be to the top of the baffle. For the record, the top edge of the baffle is 16cm wide.

Here is the simulated response:

That all looks pretty good for a 500 or 600 Hz crossover. And no horrible notch.