I do not know much about REW, But I know Nathan uses an Omni Mic, I sure he will jump on to help you
Also something to note. There is not much actual material that goes below that number. I have an 18.2 The most important stuff are around 30-100... I'd say 95% of your musical information are over 30hz. And for your drums much of that is above 50 especially impacts that you feel.
The thing with Funk Subs is that they don't sound so loud because they are so darn clean compared to my Velodyne, but it still leaves everything shaking. It's fast!
I know everyone wants 10hz flat, but there are not many times you will actually get that in a movie. It's more bass heavy.
You do not need break in on. It takes 10s of seconds to break them in. It's broken in the moment Nathan tests each of the drivers.
I have listened to them and and my thoughts were...
They are incredibly clean, detailed, beautiful rendition on vocals, distortionless, and just freakin dynamic. It is an effortless reproduction, lively and when needed can scare the crap out of you.
I used to run the pre/pro around 45, I now can run 35 because the sensitivity and clarity of the reproduction is that good. I am no were close to clipping the amp.
While Listening to male and female vocals I realized Line Arrays done right is simply in another class especially with Funks Drivers. These are using the 6.1P drivers, the 6.1P by itself already sound very nice along with the 8.2P. And I would place those ones at a reference level including the 6.1Ps when it come to reproducing vocals, dynamics with accuracy, minus the bass range. You can't expect bookshelf speaker to make bass. I do rate the 2 speakers above B&W and many other speakers and they do perform above what they are sold for right now within their design, ie not asking 20hz from it at 120dB
If you ask me if I'd rather have 3 pairs of B&W 800Ds or this line array. I would pick one of this. The difference in performance is that big in the critical range. Assuming you are not allowed to sell either speakers and you have to live with it the rest of your life
line array in room 15 degrees off axis EQed Distortion in Nathan's Room, will get my graphs eventually. His room is a lot larger than mine, very high ceilings too. No room gain practically. He mention 7000 cubic feet I think.
Funk Audio 18.2