The enclosure design is primarily dictated by the woofer selection and its desired low-frequency cutoff. I initially planned on making the enclosure a ported alignment, but after some research and testing, decided that a sealed enclosure would work the best at meeting my initial design goals.

Knowing that to do a relatively low crossover point between the woofer and the midrange I would need to use a large value, high resistance inductor in series with the woofer, I had to factor this into the enclosure design. The extra ohm or so of resistance that the inductor adds to the woofer reacts to raise the QTS of the driver. Including this extra resistance and modeling the response in BassBox, I should achieve a sealed F3 of about 50 Hz in approximately a 1 cu. ft. enclosure, plenty low for most average listening rooms. I decided to use a slightly larger 10" x 40" x 9" enclosure for cosmetic reasons, and with the desire to lean towards a lower Q design.