I've used the JX92S in a vented (or sealed) 0.25 cubic foot box for my mini-monitors. This design has a measured F3 point of 55 Hz which is excellent for such a small driver. In a 48" JX92S MLTL design the F3 bass extends below 40 Hz.

For example, compared to similar size Fostex drivers (I'll use the Fostex FE108E, FE127E and the JX92S in order) in the comparison below.

Bass extension (0.28 mm or 0.67 mm vs. 4.5 mm)
Power power handling (8 w, 15 w, 50 w)
Sensitivity (90 dB, 91 dB, 88 dB SPL 1w/1m)
Smoother frequency response (just look at the manufacturer's curves for an idea)
More adaptibility to various boxes

What is not to like about a driver that can cover a wide range--including bass and treble extension on its own--with excellent response and other factors? The Jordan JX92S kicks the backside of other full range drivers of comparable size.

Jim

Many of the Fostex implementations that I have heard sound edgy (likely overdriven) to me. To me the Fostex's typcially low Xmax limit them for rock music and such. Many need a well designed back horn for any hope of success.

"The JX92S can be designed into vented, sealed and transmission line enclosures with good success in all boxes."

Jim

GTF

I get around the limitations he mentions in the FE206E by using a notch filter to smooth out the treble emphasis and by rolling off the bass below 120 Hz or so. I use a separate woofer section for the bottom end. Still, I wouldn't mind having a bit more x-max available from the Fostex. That being said, I do like their efficiency and liveliness.

Sounds like the Jordans are very refined drivers. Maybe one of these days I'll have to try a pair.

Duke