How low can one hear Huh?? Say again

I read a review and the reviewer wrote "one can not hear sound below 30 htz" (??)
Of course he was referring to music.
I am not audiologist, but I think this is total B.S.
If that were so,we could all be happy with speakers that just go down to 30htz.
I've had speakers rated at 30htz, 26htz and presently own speakers rated at 20htz.
HUGE difference between the 30htz and 20htz speakers and a very noticeable difference between the 26htz and 20htz speakers.
Where is this reviewer coming from???