I agree that in terms of bass output @ the price point, it's pretty good.
But the -4.5dB is not very good.
The NHT SuperZero may not to down as far in the bass, but it's +/-3dB.
The Infinity P162 is 60Hz-19kHz +/-3dB Anechoic NRC. I bought a P163 2 weeks ago for $80 on Amazon.
The price of the P163 is now like $137 each, but when they go back on sale @ 85 each, they are the ones to beat.
I'm just saying....
OK, I'll be quiet now.