I just visited their website again to see they've added a review by Harry Pearson of The Absolute Sound.

In it, HP mentions that "For the record, the 'three inch' midrange's frame size is four inches, the actual moving diaphragm but two"

To quote the review "Down below, the midrange units' natural roll-off 'starts at 90Hz'...(The mids' natural roll-off is 12dB per octave and then that increases to 18dB.)"

Supposedly, there is no crossover - "a single capacitor removes the midrange from the tweeters. A single coil removes treble from the midrange"

My question is how they are they getting the mid/bass response out of such a small, sealed, driver with no eq?