I've had my F112 for a little over a week now. It was a 2-week old floor model, so it was well broken in when I bought it, (if you believe in sub "break-in"). Having listened to quite a few of the bass spectaculars, (LOTR-ROTK, WOTW, FOP, Nemo, KK, Incredibles, M&C, etc.), as well as some bass-heavy music, (Fourplay, BTS, Pink Floyd, DSotM, Steely Dan, Aja, etc.) I can state with certainty:
The F112 is *unequivocally* better than my Earthquake Supernova MKV-15.
Deeper extension.. better, smoother FR... more impact... more tactile response... and tighter, more controlled musical response.
It sounds better for movies *and* for music. Even in my very challenging room, (3,800 cubic ft., open to a stairwell and a hallway), I am very impressed with this sub's ability to be loud, low, linear and clean, especially for a sub of *this* size... or of *any* size!
It's not cheap, and many might question it's value. However, while I'm not craigsub, theEAR, jakeman or some of the other, more experienced forum members, I have heard several other, elaborate, expensive sub systems: (dual, stacked SVS cylinders; dual, co-located Hsu 1220's; dual Klipsch THX Ultra-2's; MacIntosh line array's with dual columns of six, 12" woofers; Martin Logan Descent with three 10" drivers, Velo DD series). No other system I've heard has the tonal purity of the single, 12" driver, sealed JL F112. Some of these other systems have more output, more impact, more sheer volume than the single F112, but they don't *sound* better, at least not to my ears at relatively reasonable listening levels, (and I like to listen at levels where my *kids* are asking me to turn it down).
The F113 is said to only exceed the F112 in sheer volume output by a few dB, and by maybe 1 or 2 Hz of extension. If this is the case, the F112 seems to be the cost-effective "sweet spot" for high-fidelity subs, IMO.
Lombardi said it:
"Perfection is not attainable, but if we chase perfection we can catch excellence."