OK, so I'm about to pick up a pair of ex-IMAX speakers plus a sub.

Wot I do know, is that they 'may' have (per box), is 4x 2123 (or 2202), 2345, TAD TD-2001, and a 2245 (sub).

Wot I don't know is, what frequencies are these things crossed at, and is the model with the TAD before or after the model that had the 2404?
Also, are these things completely bi-amped or is the TAD passively x-ed?

Any IMAX specialists out there?

Cheers all.