I'm really not sure what is going on with the mid-woofers. It looks like they actually are direct-radiating, and the tube is acting as a sealed cabinet, no?

I can't find anything about the cost. Anyone else have luck?

Best,
E
Love the innovation and new thinking. Does anyone know the price? LOL to the comment “glamorized sewage pipe”.  
In terms of using plumbing for speakers, I think the venerable Seigfreid Linkwitz has everyone beat with his LX mini:
http://www.linkwitzlab.com/Store/LXmini.htm
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I would never allow such a privacy invading product in my house. I barely tolerate a Nest thermostat.