I built the cabinets to the deminsions of the drawings. I used fiddleback maple face and 3/4 mahogany ply on the sides and back. Madisound will sell you the covered grills they are black cloth. I upgraded the crossover caps and inducers. Great sound form the Scan-Speak drivers.
Zaph Revelator Tower: https://www.madisound.com/store/product_info.php?products_id=8591