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There's remarkably little information here. What is that max speed and max frequency? Do they use a full-reversible fan or just vary between open and closed? What's the max air flow? By way of comparison my conventional 2 x 12" SV subwoofer displaces a max of 5 liters per stroke. (I never turn it up more than about a quarter of the way, and it shakes the whole house.) Multiply that by 2 per cycle (5 liters forward, 5 liters back), by 40 cycles per second, and it's pushing 400 liters of air every second. That's about 850 cubic feet per minute. If they're actually reversing the fan they'll need a 425 cfm fan to equal my sub. (Although my sub is never run that hard.) Looking around, that's about the size of a server-rack fan, which matches up to what we see in the pictures.

If the max air flow is relatively low, they don't have to run the fan very fast. Slow tip speeds means low noise, so it might not actually be that bad. Since it's not firing directly into the room, they're probably lining the enclosure with high-frequency absorbant foam to damp the fan noise. The low frequency waves won't be affected.

But all in all, I think you can get better performance from a conventional sub for significantly less $ unless you really need frequencies below 18-20 Hz.

Waterfall graphic for the menu from "The Haunting" DVD:
http://www.svsubwoofers.com/images/Bassy%20scenes/ hauntingmenu.jpg

Link to more waterfall graphics for a bunch of movies:
http://www.svsubwoofers.com/faq.htm#moviedemos

Link to more waterfall graphics for music:
http://www.svsubwoofers.com/faq.htm#musicdemos

Link to frequency response chart for my sub:
http://www.svsubwoofers.com/images/performancechar ts/1646pci_fr_mr.jpg

Source material is available and drivers are available to reproduce freqs below 20 Hz. Not only is it available it makes a noticable difference in the movie watching experience. There is much less music available but it is out there.

Waterfall graphic for the menu from "The Haunting" DVD:
http://www.svsubwoofers.com/images/Bassy%20scenes/ hauntingmenu.jpg

Link to more waterfall graphics for a bunch of movies:
http://www.svsubwoofers.com/faq.htm#moviedemos

Link to more waterfall graphics for music:
http://www.svsubwoofers.com/faq.htm#musicdemos

Link to frequency response chart for my sub:
http://www.svsubwoofers.com/images/performancechar ts/1646pci_fr_mr.jpg

Source material is available and drivers are available to reproduce freqs below 20 Hz. Not only is it available it makes a noticable difference in the movie watching experience. There is much less music available but it is out there.

Waterfall graphic for the menu from "The Haunting" DVD:
http://www.svsubwoofers.com/images/Bassy%20scenes/ hauntingmenu.jpg

Link to more waterfall graphics for a bunch of movies:
http://www.svsubwoofers.com/faq.htm#moviedemos

Link to more waterfall graphics for music:
http://www.svsubwoofers.com/faq.htm#musicdemos

Link to frequency response chart for my sub:
http://www.svsubwoofers.com/images/performancechar ts/1646pci_fr_mr.jpg

Source material is available and drivers are available to reproduce freqs below 20 Hz. Not only is it available it makes a noticable difference in the movie watching experience. There is much less music available but it is out there.

Waterfall graphic for the menu from "The Haunting" DVD:
http://www.svsubwoofers.com/images/Bassy%20scenes/ hauntingmenu.jpg

Link to more waterfall graphics for a bunch of movies:
http://www.svsubwoofers.com/faq.htm#moviedemos

Link to more waterfall graphics for music:
http://www.svsubwoofers.com/faq.htm#musicdemos

Link to frequency response chart for my sub:
http://www.svsubwoofers.com/images/performancechar ts/1646pci_fr_mr.jpg

Source material is available and drivers are available to reproduce freqs below 20 Hz. Not only is it available it makes a noticable difference in the movie watching experience. There is much less music available but it is out there.

Speakers capable of reproducing deep bass tend to be either very large, or power hungry. As it is rumored to be quite difficult to sell large speakers to married men (the industry term for this is waf-- wife acceptance factor), and power hungry speaker require large, expensive amplifiers, speaker designers took advantage of the fact that humans can't easily localize low frequency sounds and designed satellite--subwoofer systems.

But, in well designed systems of this type, the satellites contain woofers capable of reproducing middle bass. The subwoofer terminology refers not to the sub's infrasonic capabilities (although expensive subwoofers can produce useful bass below 20 Hz), but simply to the fact that it's tuned lower than a typical woofer.

Many subwoofers on the market only go down to about 50 Hz, although there's at least one (very inexpensive, and reasonably good) entry-level subwoofer that goes down to 25 Hz.

SVS, a subwoofer manufacturer. has a list of subsonic scenes in movies, with waterfall charts, that points to the presence of subsonic sound in some movies.

Oh, and they are an Internet sale only company - you buy subwoofers directly from them, there are no other dealers between you and them.

And I don't own a SVS ... yet ^_^ (and neither do I work for them)

forget making the case a sub, park one of THESE badboys in the corner and you're all set :P~~~