Paradigm Signature V2 vs JL Audio F113

Well Bob - and anyone listening here - if any of these subwoofers (or any speaker for that matter) where going to actually be used, setup in a large 500,000 cubic foot ware-house, or out in the open in a park, I could see one subwoofer/speaker possibly outperforming another in certain aspects of output and loudness capabilities. For that, I would concede superiority of one speaker over another - especially for that/those applications, in such large open spaces.
However, 99% of the time, these subwoofers are going to be used/placed in relatively small domestic home spaces, where the close proximity of boundaries to the woofer drivers and ports are so close, that there is an exponential reinforcement curve of the frequency response and volume level of a given frequency set, who's frequencies lie within a certain range in the bass response. Respectively, the frequencies that are boosted the most, are the lower bass notes, who's frequencies are very long wave lengths - easily boosted as a factor of the proximity of boundaries, in relation to the wave-lengths. Actually, any frequency who's quarter wave length is longer than the distance of a boundary to the woofer (in this case), is going to be reinforced at a certain factor (I think 6db of boost for one boundary, 12db for 2 boundaries, and 18db of boost for 3! - I think that's right)
Never the less, the practical application and real-world performance of one of these subwoofers over another, placed in a small acoustic space, is going to negate any real advantage here, in the respect you're suggesting.
Actually, I believe audio/magazine reviewers have covered this point on numerous occasions over the years, when reviewing subwoofers, and real world applications. In fact, placing the Sunfire in/near a corner, would boost ALL it's perspective frequencies and output so much, that it would possibly NEVER distort at any output level of relevance, I suggest!
I've had experience with both the Velodyne's and Sunfire's over the years. And I find the key is really in the setup of the woofers, as a first priority.
I also wouldn't way that one Ferrari is superior to another, simply because one set of statistics is better than another. Each one would have to be judged in the context of it's APPLICATION! This I think is the far more important factor. I would judge one subwoofer much much more on their musicality and response time rather than how low and loud they could play at certain frequencies, balls out! but that's me.
I'm sure an engineer would see things differently, from a pure science point of view.
But then EVERY SINGLE speaker and audio equipment engineer I ever met (and I met a few of them, including John Dunlavy, Bobby Palkovic, Peter from PBN, and others) has A COMPLETELY DIFFERENT OPINION ON WHAT IS BEST, MOST ACCURATE, AND WHAT IS THE RIGHT/WRONG WAY TO BUILD EQUIPMENT!!! - even difference in opinions on what are the importance performance and measurement criterion for a speaker or piece, amp, etc.
I basically don't think the measurements you're siting make that much difference, as a critical performance factor, in most typical home applications. It's like saying a bookshelf speaker is of no use, because it only plays down to 80hz, or starts distorting at a lower output spl level, than another.
That's my opinion anyway. I wouldn't not get one woofer because another played lower, louder, basically - just on those criterion

My experience from selling all types of audio equipment (mostly home audio), is that measurements don't necessarily mean better overall perceived sonic performance! One amplifier can have better total harmonic distortion ratings, or higher current output, better damping etc - but that doesn't mean it necessarily sounds better than another with less impressive numbers! The same goes with speakers. I've deal with and sold many speaker designs with otherwise stellar free-room response (+/- 3 db throughout from 20hz-20khz, approx), excellent impulse response time, favorable water-fall plot curves and off-axis response, impressive top end frequency extension ratings (as well as low end extension and overall dynamic range),etc, yada, yada. And yet they sounded AWEFUL!!!
And the same speakers that certain engineers claim are simply so wonderful and perfect, are not so perfect when you consult other engineers! (For instance, Wilson audio makes some otherwise very highly rated speakers, as does Bobby Palkvovic from Merlin - applauded and praised by audiophiles the world over. And yet guys like John Dunlavy and Jim Thiel might say they think those designs are not good! - and vice-verse.
I've talked to some of these highly regarded speaker manufacturers over the years, and they don't agree on many things - and surely their idea of measurements, speaker design, and real world performance differ greatly.
Back to sub-woofers, I can tell you from personal experience that just because a sub woofer is more efficient, and can play lower/louder than another doesn't mean that it's more accurate within certain performance parameters, than another. Also, I've found many sub-woofers with otherwise excellent power handling, extension, dynamic range, and response capability, to lack seriously in terms of speed, damping factor, "Q", etc!!!
I can tell you for certain, that some otherwise musically accurate and fast, coherent sounding sub-woofers don't necessarily have the measurements you sight, and yet they are otherwise very good within certain limitations and applications, offering advantages over more robust woofers. And yet these still perform superbly at real world listening levels and application - sans super large venue applications, playing at THX levels, and so forth.
I would submit that, for most people's listening levels and preference/lifestyles, and such, many subs on the market work just fine for the masses. If, again, you have seroius money to spend, and an ambitious set-up in a massive space, and need all out sheer brute output and extension, dynamic range, etc, then I could see being more critical of "numbers".
Case in point: the Rel subwoofers are otherwise highly sought after by many audiophiles, and are musical and "accurate" sounding, overall. I find these very same subwoofers to lack dynamic output and extension, even "bottoming out" and distorting, in full on THX playback in modest sized spaces, and with heavier dynamic music demands!
I would beg the point, thatmany of the larger woofers out there, with better power handling and extension, aren't so musical, accurate, fast sounding, potentially coherent, often - and are not necessarily right for everyone's taste or applications.
Basically, there's lots of compromises in audio/video equipment, and none of it's perfect, or perfectly suited to another application, taste, or lifestyle. If so, everyone would own the same gear!
I can tell you right now, without even looking at the JL audio specifications, that the Paradigm Servo 15 is still likely a better sounding subwoofer across the board! It's probably more "musical", fast" and "accurate" sounding in most any reasonable environment and application for the home. As I said, I've sold the Theil subwoofers, and even Wilson's $10k subwoofer in the past, as well as the M&K's and Earthquakes (which I actually like overall), Velodynes, etc. And I would rather have the pardigm sub over all of these, at this point! Infact, I wouldn't own any of the mega buck subs, likely. (Actually, If I did, I'd sell em, and use the money to buy a couple of the Paradigms in stead - leaving money left over for other more important opions, indeed -You bet!) But, that's me.
Infact, you should pose the question to pro reviewers, as to which of these two subs they'd be picking between the two. I bet the Paradigm wins out. But, I could be wrong. Ya never know - its' just a hunch.
In fact, If you're right about sub-woofer choice criterion, then you should contact every single audio/video magazine professional reviewer, and let em know they should buy YOUR SU-WOOFER CHOICE! And if they don't agree with you, you should tell em what you told us, and tell em why they're wrong! I'd be interested in hearing their response's.
Lol- actually, that would make for a great thread!!! Why not email this position (opinion) Bob to guys like Bob Harley, Steve Geuttenberg, and other writers for publications, and argue these points with them?! Then post their responses, and your posts to them. That would be a hoot! Then we might better decipher some view points here.
What do ya think?

In reply to Bob_Reynolds...

I never mentioned that I do have full Paradigm signature S1's v2,center,and ADP's in piano black. I am wondering whether to go with dual subs. What do you think about that issue??? I do wonder about the 13.5" woofer In the JL F113 being tighter for music but the Sigs 15" woofer playing lower for movies.........it's a hard decision to make as they are both nice and both come in gloss black. I really think my M&K just bogs on movies and is underpowered for some loud movie passages and loud loud music . Let me know your thoughts....

Regards BACARDI