Originally Posted by kbarnes701
I put on the test CD that came with my OmniMic, select the correct track for FR and then go into Setup on my 5509 and select speaker distance settings. Oh yes, before that I turn off Dynamic EQ and set the unit to play two channel. Then, in distance settings, I manually adjust Sub 1 and Sub 2 while observing the graph of FR in my OmniMic software, set to show 20 - 200/500 Hz with 1/24th smoothing. I use trial and error to get the flattest response I can - as you adjust one sub you may have to go back and re-adjust the other until you have the best curve you can get. I don't know if this is the 'authorised' way to do it but it works for me and I get a great result.
I've finally got five days to myself and the crack Audyssey assistants (the barking ones, Maltese and Maltipoo) to tweak my Audyssey Pro setup - or jump down the rabbit hole further, as Chris would say. My wife and my MIL are dropping our 14-year-old off at overnight camp and doing a mini-trip while I'm working during the week, so I can go into hermit audiophile mode. We just came back from 10 days in Israel, so I've only been keeping up sporadically.
Anyway, when I tried the distance tweak (manually adjusting Sub 1 & 2 up/down individually from the Audyssey Pro settings) last month, I didn't see any improvement at all in my 80 to 100 Hz splice where I had a -5db level dip, and that was going as much as 4-5 ft up/down on the sub distances. I made sure to periodically clear the averages on OmniMic to get a more accurate read doing the adjustment, but it didn't make any difference. FYI my Mythos ST are at 80 Hz crossover (Pro of course suggested Large/40/60/80), with the CS-8080 center at 80 or 100 Hz (surrounds are at 100 or 120 Hz). At least getting the Sanus stand helped on the center response when I measured it independently, and the sub response is flat (+/- 3 db) from about 20 Hz to almost 80 Hz, so one thing taken care of.
What OmniMic track are you using in two-channel mode these days, Keith? The sine sweep on Track 2, or one of the ones that are bass only?
I'm almost wondering if I should try a different crossover for the ST mains, like 60 Hz, to see if it give me more room for the bass in front and makes the crossover smoother and then retry the distance tweak. Or is this the path to madness...as I've always been a 80 Hz fan for the mains. And I've 'level matched' the mains and subs with the OmniMic SPL.
Any thoughts? I'd like to try to tweak this more while I have the time over the weekend or at night.