My oh my....guys check this out

Well, to do it properly, I think you'd really need a stereo pair of these...!

Insane ............ to say the least!

What would be the audiophile source for a 1 hz signal? Or is it only for reproducing earthquake scenes for home theaters?

Insane? I think not! How many of you have spent $5 to $10K for anything in your audio system? LOTS of us, I'd guess.

I heard this thing in Denver, and FINALLY I'm justified in using the superlatives others toss about to describe, say, differences in $1000/M IC cable or home-AC duplex power outlets. This thing is simply awesome, jaw-dropping, fabulous, etc. I could hear tones to about 16Hz, but below that, its output is felt. At 2Hz it was oscillating the room door about 2" peak-to-peak!

Yes is does require an adjacent space. Yes it is expensive, but many companies have subwoofers priced well up into the many-thousands of dollars--the 4-driver Genelec raved about in the SW survey published by the now-defunct 'Stereophile AV Guide' (?) is priced at $12K.

Insane? Not at all. Self-indulgent? You betcha!
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Not insane. How much do Krell and Wilson charge for their huge boutique subwoofers? This thing may outperform them easily (seems as if it does, based on its rated output) and costs far less.