The JL woofer looks impressively built - so this may be a good start. Nevertheless, if you want to watch music DVD at audiophile quality distortion levels (not just impressive volumes by moving copious amounts of air, as in car systems or war movie such as in U571) then you may want to enquire about the Xmax (one way movement at less than 10% THD) for this driver. I have not found a quote for this specification which matters to audiophiles whilst only moving air matters to impressive car system and U571.
As far as I can tell, JL use the "overhang" Xmax method which when doubled they cterm as "linear peak to peak", which is simply geometry based and ignores the voice coil offset, magnetic field asymmetries, suspension problems and other driver defects (The 10% THD Xmax method has issues too, but at least it is much more rigorous)
JL claim the linear peak-to-peak excursion is 2.7 inches for the F113 (constant number of VC turns in the gap). EXTREMELY impressive but how linear this is one can only begin to guess...geometry is geometry and it is not sound!
JL's data is so impressive you could think that famous driver manufacturers like Volt that sell expensive drivers (with far less impressive specifications) do not know what they are doing ....but I doubt it somehow!
So be careful, despite the rave reviews this is a car audio speaker adapted to HT...perhaps the Hi-Fi speaker industry has some tricks to learn from this newcomer ...perhaps not.
