For $6K, this sub is over priced a bit. Not saying that it doesn't sound good because I'm sure it does
Rythmik Audio offers the dual-opposed, G25HP Direct Servo sub. It offers solid response down to 14Hz and 1.8kW of real, continuous power. It's also half the price and, since it's a servo sub, it will be cleaner.
Also, in piano black, being less than $3K, why would you even consider this sub?
Hey, the push-pull design does reduce distortion, but only the even harmonics. The more egregious distortion is odd order harmonics. They are what you will hear more easily and will, in your brain, register as unnatural. This is why a servo sub will sound better. Hey, a push-pull servo would be even better.
Which begs the question, why has S&V never reviewed a Rythmik servo sub? They offer not only the best performance of competitively priced subs, but of any subs on the market, period.
Also, 4 or 6 small subs will out-perform 1 huge sub and they are a lot easier to move.