[Arny Krueger]

"fid" wrote in message
ps.com
Hello,

I have a Rel Stadium III positioned on the left corner
next to one of the two front speakers, Vienna Acoustics
Mahler. I have set the High Level Crossover to 27Hz. I am
still puzzled by the subwoofer phase settings. I checked
with a digital SPL meter in conjunction with Rives test
CD 2. Whet I set the phase to 0, the sub outputs more
sound at 32hz, (93 db) 40hz (95db) and less at 25hz(80hz)
and 20hz(77db). The contrary happens when I switch phase
to 180. I get higher output level at 20hz (83db) and 25hz
(80db), less at 32hz (88db) and 40hz (84db). In few
words, depending from the test tone I play I get audible
different results, as to say phase 180 setting and test
tone 25Hz or less would be fuller then 0. With phase set
at 0 and test tone played at 32hz or even 40hz would be
audibly fuller.

Because It appears that phase set to 180 phase would
flatten the low region of the sound would in practical
terms be the best choice for me since my room interaction
produces a huge peak right at 32hz and 40hz.

Do what sounds best to you.

But my question is: theoretically which setting would be the
ideal?

Room acoustics is such a complex area that it would take a huge amount of
data and analysis to properly answer your question. Since you already seem
to know what your preferred answer is, do it!