"dave weil" wrote

Please consider the whole system. You got speakers
with frequency response starting at DC or a 1 Hz?

You got speakers with a FR that includes 6hz?

It's interesting to note that some of the subwoofer
manufacture are designing down to this low level
like: Bag End 8 Hz, Definitive Tech. 11 Hz, Linn 2 Hz,
Paragon 11 Hz, Thiel 10 Hz, California Audio 9 Hz
and Audio Physic 10 Hz.

You only list one manufacturer who goes "down to
this level".

True, but all are well below what is considered
to be ideal/theoretical limits (20 Hz) of audio
perception.