For the most part it's a safe bet that most of us have sound meters and after wandering our rooms while the equipment is turned on and operating, know the acoustical qualities of our room and everybody knows that having an information base in which to base a decision, is better than shooting in the dark with nothing more than a wing and a prayer.
Also it is assuming using total driver xmax at given particular frequency from what I can see. I don't know xmax and don't think Mark has given it. Probably ~ 20-26mm each way is my guess.
If Mark hasn't given it, then "probably" isn't a rational response regarding the use of the calculator as it's a fifteen inch sub and even Hsu subs, at 33mm have twenty-five percent more Xmax excursion then what you suggest the SubMersives have. FWIW, for my reasons, my concern is the SPL at the 16Hz - 25Hz range. I consider my question to be a legitimate question on both parts regarding how much current draw can be expected at the outlet while under heavy use and so I can figure out if the sub is a good fit for our room SPL wise, this calculator coupled with Xmax and my intimate knowledge of our living room helps give me the needed information to help me make the decision of; do I go with a better looking SubMersive HP (high WAF) or a better performing, yet larger and boxier looking (low WAF), Captivator 2400 with it's stated 30mm excursion. No matter which way I go, neither manufacture is going notice as this is not some veiled inquisition.
(FWIW, I can find excursion data on Hsu and Captivator subs.)
Considering the SubMersive HP sub, in the color of my choice (high WAF) is close to $3k, it's reasonable for one to want to be sure of the sonic fit before spending the money and saying "I do." Xmax, plugged into the provided calculator will help create the missing puzzle piece (how loud for a given space) and knowing the current draw will help me understand if I'll need to add the addition of a dedicated circuit to the overall cost of this subwoofer. I can't buy a stated 2,400W amplifier based on someone telling me; "Don't worry" as they're not going be responsible for any troubles I run into down the road.
With all due respect,, if the manufacture states that it's a 2,400W sub, putting this sub on a 20A circuit (capable of "only" 2,400W) is an act of futility when coupled with a seven channel AVR, Blu-ray player, Comcast DVR and a pair of high current draw subwoofers, expecting to play, THX reference level sound; max current draw. It's reasonable to want to be able to add up total watt demands so as to know circuit current demand. It's not reasonable for one to generalize current draw and say don't worry, it's good enough.
Thanks for your thoughtful effort to answer my question. If anyone has any accurate insight to questions regarding current draw or actual Xmax figures, I'd love to read more.
Edited by BeeMan458 - 10/31/12 at 5:53am