Man, I need to BUILD a set of those. I've measured those EPI woofers, and from the simulation I did, the 200 cabinet, with that passive radiator, should have some SERIOUS low bass. As in flat to below 25 Hz, if it's tuned for maximum extension!
Hmmm... got a pair of the "world's crappiest 12" woofers" around here... knock the magnet assemblies off, rip out the cones, recone the baskets as 12" passive radiators, grab a pair of my stowed-away EPI 8" woofers and tweeters...
Regards,
Gordon.