"MD" wrote in message
...
Arny Krueger wrote:
[snip]


I don't like analog EQs because their center freq and bandwidth are fixed
and rarely coincide exactly with the center freq (and assoc bandwidth) of
the peaks and nulls one actually has in their room. For instance I have
peaks at 48, 68 and 130 hz - but a null at 52hz. Ana analog EQ would not
be able to deal with this unless in had a huge amount of narrow bands

That is very strange, UNLESS you have a very large room. As the room size
increases, the modes move toward a continuum. I suspect that some of this is
due to the speakers, in addition to the room

Passive room treatment for this (not reflections) seems also very
problematic to me because it's more indiscriminate than the analog EQ. It
will absorb anything in it's range (maybe not linearly) and absorb the
nulls as well.

Actually, passive treatments do not absorb nulls. The depth of the nulls
will actually decrease. In a completely absorptive environment, ie., an
anechoic chamber which happens to be effective at low frequencies, there are
no room related peaks or nulls.

Passives are not linear, but neither is gypsum board, so you won't lose
"room linearity", a term which is not really applicable to a real room.