I used 3/4" MDF for the exterior of the enclosure and 1/2" MDF for the midrange sub-enclosure. The mid enclosure runs from the front baffle to the rear baffle, and braces the enclosure very well in the process. The tweeter/midrange pair are centered vertically and horizontally on the baffle. The 6-1/2" drivers are centered vertically and 1" in from the outer edge of the baffle. All drivers were flush-mounted. External dimensions of the enclosure are 20-1/2" wide, 10" high, and 7-3/4" deep.

An aperiodic vent was added to the midrange enclosure to increase it's apparent volume. The vent is centered on the rear of the cabinet directly behind the midrange driver. The woofer portion of the enclosure is stuffed with about 50% pink fiberglass, and the mid enclosure is 100% with a small dab of dacron for contrast. A square of heavy felt was placed on the rear baffle directly behind each driver.

Drivers are sealed with a small bead of "Mortite"-type rope caulk.