Quote Originally Posted by jaree
Yes, assuming one has perfect hearing at low levels and can discern a 17k and a 30hz note as clearly as a 2k one at 60db or lower levels.
It would seem we are talking about different phenomena. The original question had to do with a "muddiness" at low levels. You can get quite clear response, albeit not as high in relative level at the extremes, while listening in the 60s and 70s with good gear and recordings.

While not a great recording (a fun one for sure), I was listening yesterday to Thomas Newman's soundtrack from "Lemony Snicket". The bells in the first two bands can be heard quite clearly and crisply while listening at sub 70 db levels (plus or minus the error of my trusty Rat Shack meter while using the fast "C" weighting)

rw