I modeled the B4N woofers in BassBox Pro and came up with a 0.16 cu.ft box. Since this is a relatively small box, I decided to use 5/8" MDF, but ¾" MDF for the baffle. The final dimensions are 9.75"H x 6.25"W x 7"D. The box was tuned to 62Hz with a 1.375" diameter x 5.625" long vent. Expected F3 was around 56Hz. Both woofers and tweeters were centered on the baffle, and center to center distance was 3.75", well within the 3KHz crossover point.