Mark Seaton
WBF Technical Expert (Speaker & Acoustics)
Here is my baseline and set-up.
Speaker controls at default
Repositioned my speakers to the "Golden Process" on the EA website. Rule of thirds not feasible.
New Speaker position - from side wall to center of speaker - 44.7" (was 36")
New Speaker position - from front wall to front of speaker - 72.4" (was 66")
New Sitting position ~ 78-84".. just past the triangle and about 118" (was ~84") from back wall
Measured 20Hz - 200Hz, no smoothing
Overlay =
Green tracing is mic 4' 6" from back wall
Gold tracing is mic at new seating position ~118" from back wall
Looking Good!
Edit: just took a quick listen... all I can say is Holy Crap!!
Hi Bruce,
Entertaining, and busy thread here. I took a little time to skim and catch up last night, and took a quick stab at a simplified model to see if it tracked the peaks/dips. With some tinkering after a modeled curve that looked related, I'd be curious to see a measurement like the above at the following listener + speaker location:
Keep listening position 118" from back wall as above.
Keep same ~45" from side walls.
Slide speakers closer to front wall such that front center of woofer/baffle is 57" from front wall.
I suspect this will tame down the 55-75Hz range. The location might not work overall, but I'd be curious if the changes follow what I'm guessing.
For the few wondering if the recessions in the response are really all that audible, I would argue they are highly audible, especially for mixing. After the bass range I'd then set the sights on the 80-300Hz range.
I suspect the 3kHz dip is related to listening height vs. tweeter height as that will impact the integration of the mids & tweeter at the listening position. Try taking another comparative measurement to the one below while moving the mic down to within the height of the tweeter:
Also remember that you can do some experimenting to check what dimensions are responsible for different effects by moving the microphone in a single axis rather than heavy speakers (especially vertically!).