Originally Posted by MKtheater
I had the same problem with omnimic myself and finally bought a calibrated behringer mic and used REW. I think once you have a sound card and mic all setup REW is easier but it takes much more to get it going.
Wow, I respectfully disagree.
In my opinion, nothing is as easy as OmniMic.
Originally Posted by beastaudio
I have used OM v1, uncalibrated, and REW with the UMM-6 calibrated from CSL and they both show an identical drop at about 11-12hz, which is also identical to what I have measured on every single build that I have done, and on three different AVR's. It is frustrating, with 8 sealed 18's there is no way I should show the same drop-off that I do, but should I measure with your mic that obviously measures fine below 10hz, then I could at least cross the mics being the issue off my list
Does the level return below the 11hz-12hz range? If so ... I've seen this before myself, in my room, and have seen it elsewhere too. Also, I've seen measurements with similar characteristics. I've always suspected some type of diaphragmatic lossy movement of my ceiling ... single story ranch .. above my listening room is my attic. I've discussed my findings with Josh Ricci, and he's had similar suspicions in many of his measurements.
Mine is fairly tightly focused, around 11hz-12hz, then the levels come back up until 7hz-8hz, then the entirety of all the collective signal path roll-offs, combined with the drivers etc, dropping off from there. It's never been more than a scientific concern, no biggie really.
So, that said I'm not sure what causes the anomalous behavior in my room, ... hell, there's times I couldn't get it to happen, .. so who knows.
If the boundary becomes lossy, sympathetically moving, that's certainly utilizing energy that otherwise would be impacting the listener.
My 2 cents.edit; I may have misunderstood a suck-out, for a drop off