The drivers are test fitted on a front baffle. The centerline for all drivers is 4" from one side of the 10" wide baffle (be sure to make mirror image baffles). The tweeter center is 29-1/4" down from the top. The Tweter-Woofer CTC spacing is 5-1/4". The Woofer-Woofer CTC spacing is 6". These spacings will accommodate a solid brace just below the tweeter cutout, dividing the enclosure into two equal 2 cu ft subsections, plus a window frame brace between every second driver.