This enclosure Featured on SMD's Meade916 YouTube channel, is available as a product! it is a 4 x 15" subwoofer enclosure made with 1.25" Baltic Birch an acrylic window (has rgb leds) with a custom 3d engraving and 3d machined/ multilayered top.

Internal Vol : 12cf
Tunes to 32hz has an estimated bandwidth of 23-63hrz
Cutout Diameter: 14.25"
Mounting Depth: 14.75"
Dimensions: 47.75"W x 23.75"H x 35.5"D - 181" of port area
Weight: around 220lbs

Product is made to order expected lead time: 4-6weeks

Subwoofers not included, Tahoe not included.  Just an enclosure.