I think Benni777 isn't 100% accurate. My impression from the live stream was that a passive radiator did not produce the results they wanted for this particular design so they went to dual active speakers. I don't think they were saying that passive radiators are inherently bad. Listen to the stream before you judge.
It's still pretty impressive that they got down to 23Hz in that size cabinet, and they said that it will reach deeper with DSP. I think they help achieve that by throwing a lot of power at it with the 3000 series amp. I missed the give-away ;_; but the last prize was a pair of Ultra bookshelves, the Micro 3000 and all the cabling you would need. I think for a den or small office this would make an awesome system. I don't think they were pushing it to be a home theatre replacement for bigger subs but even for home theatre if you have a small room and need a small sub, this looks pretty good on paper at $799 US.