I wonder what a VLFC would measure going full tilt unweighted. It's below our hearing, but it's still energy.
Not to get into the semantics between hearing and feeling, but most people can detect LF above a threshold of around 90 dB at 16 Hz. Reaching about 125dB at 16 Hz sounds about as loud as 80 dB at 1kHz.
The Meyers VLFC is rated 125.5 dB (Linear Peak SPL, with crest factor >10.5 dB (M-noise) somewhere in it's passband of 13-30 Hz.
My guess is it has a bit less output than JTR's Captivator 4000-ULF, which can do around 130dB at 30 Hz.
JTR is using 18" 60 pound woofers with as much as 33mm Xmax, almost double the displacement of the better "long throw" drivers used by most companies. Getting 146.8 dB SPL down low with room gain from 9 of those monsters is completely possible, as Ivan said "That's not really all that loud for a "good" home theater".
Art