Hello Raul - Feliz año nuevo and welcome to the thread.
If I may make some comments to your post.
Rauliruegas
One critical subject in the sound generated by any subwoofer is that we at home need enough cubic area for the bass soundwave can be in real way developed, if that cubic area does not exist any one can't " hear "/ feel a 5 hz soundwave. We need " hundred of m. to those very low bass sounwafes really be formed.
Yes, I agree you can't defy physics when it comes to bass especially when someone is making a Subwoofer inside a BOX (enclosure) and placing it in a larger box "the room". One of the latest audiophile darlings.
The Gotham by JL Audio
reproduces 19hz - 200hz (+-) 3db
Dimensions* (H x W x D):
34.13 in. x 21.50 in. x 24.00 in.
867 mm x 546 mm x 610 mm
360 lbs. (163 kg)
$12,000 plus $3500 for the crossover. US dollars.
Now in regards to this ET Rotary Subwoofer - it is thinking "outside of the box" and it is designed to take over where that JL Audio Gotham stops producing below 20hz. It uses that "extra room in a persons house" meaning , the basement, the attic, side room that the rotary woofer gets installed in - the room, space itself becomes the BOX - the infinite baffle ....the sealed enclosure.....
Rauliruegas
Yes the ET unit is something really different of what we normal mortal audiophiles know
So who is the customer for this? This rotary woofer is now being used in theme park attractions, concert venues, professional audio applications and research projects. But I think there are also possible clients for this product right here at Audiogon. Any potential customer for a start would need to have $12,000 US dollars for the Rotary Woofer which is similar to the JL Audio Gotham price. But from there an additional $8k -$12k for the design and installation. So approx $20k - $25K US dollars total which includes crossover and external amp. And of course this person (client) has a house with the space available for the installation of the Rotary Woofer to create this infinite baffle.
For this, the person gets to hear and feel "the 11hz hertz fundamental frequency from a helicopter rotor, the low frequency rumble of wind, the space of a concert hall or infrasonic information contained in an explosion." taken from the website.
Well this client is not me.
But let us just imagine; this "guy" male customer (no woman would do such a thing right? ) but .......imagine this guys wife, spouse, better half coming home to see the inside walls of their beloved home doing this.
http://www.rotarywoofer.com/africa%20photos/Africa%20Video%20Snapshots/Kombi%20Roof.gifthe above is from the Africa segment linked earlier. I got a good laugh - the video shows outside the van containing the Rotary Woofer working inside the van to attract the Elephants.
And from that link's description.
"With the rotary woofer playing a thunderstorm recording, the elephants all stopped eating and turned toward the camper van."
Cheers