It is comprised of two Eminence Kappalite 3012LF Woofers and a Creative Sound Solutions APR 12 (Adjustable Passive Radiator). We have tested this speaker to reach 3 Db lower than the KPT-KHJ-LF Cinema Jubilee and the Mid frequencies are much richer, crossing at 750 Hz.  The cabinet is constructed of premium quality 13 ply, 19mm (3/4”), void free Baltic Birch.   No MDF is used anywhere in the construction. The cabinet is constructed with mitered joints and glued and screwed using Pocket Screw joinery.  We used professional TiteBond Series II wood glue for superior bonding.  All counter-sunk screw holes and Pockets are filled and glued with wooden dowels and sanded smooth.