Perhaps people with extremely capable systems with lots of ouput to 10 Hz and lower are simply feeling the effects of the 20 Hz content much better, but still not really getting much from below 16? Personally, when watching a scene like this, I have no innate ability to pinpoint exactly which frequency is shaking my room. But playing individual tones, at normal movie watching volume, under 16 = nothing, 16+ = rumble. I cannot achieve reference level output to 10 Hz, but I am flat to 10 louder than what I listen.
I was discussing this with someone who insisted the stuff below 16 Hz was causing all kinds of shaking and rumbling in his room. I asked him how he knew, and he posted a spectrograph of the WotW pod scene. So I asked, how do you know it isn't all the 16-30 Hz content in that scene that you are really feeling. He said its because he is flat to 11 Hz and thats where all the tactile feel is. Seems to me like he thought thats what was doing it, therefore in his mind it was, but doesn't seem very conclusive to me.
After all, a lot of the DIY guys are focusing more and more on ported subs for better 15Hz and up output. Starting to feel to me like this is where the action is.
This is with no eq below 20.
A sweep done at -5(much louder than I listen)....might have been -10, I need to run a couple more sweeps this weekend. My mic was clipping at this level so I could not go any higher so need to fix that issue but don't plan on sweeping too much higher...don't want to fry anything.
Brian if I ever add a 2nd XS30 I might do the house curve, but I am afraid I might not have the headroom with one.
I think I will pick up a radio shack SPL to verify the mic is reading correctly.....started clipping at 95 db or so which should not be the case.
I ran a 5.5 second duration sine wave sweep from 10-300 Hz, generated by REW and transmitted to my AVR from my laptop via an HDMI cable with my front left, right, center, and both subwoofers playing, and recorded by a Umik-1 calibrated mic.