Uses Eminence Legend BP122 12" woofer and Tang Band 4" full range driver W5-2143. These speakers alone are worth about $500 new!
Cabinet has a 1" thick laminated baffle board. Measures 40x18x9(deepest)
There is no crossover. Woofer should crossover about 100-150 Hz. MiniDSP could function as a crossover with four channels of amplifier. Or one could design a crossover.
You need some speaker DIY experience to make use of these. Included drawing is only approximate but provides a rough idea of the design.