I can't say I've kept track of how many times I've run MCACC and tweaked the BFD settings, but it was a lot. It's easy for distortion to creep in when using the BFD and most advice tends torwards the "only do cuts, or maybe 1 or 2 adjustments". As distortion goes, I think the trick is to just do minor bumps up or down, and that having a number of them (say 10) doesn't detract from the SQ much if at all as long as you don't "stack" them.
BTW - room measurements were done with REW and Radioshack SPL meter. The following are my Pre-EQ measurements:
I was suprised at these measurements. I expected with the kitchen back wall, I'd probably get a 14hz-ish bump from room reinforcement. Instead, my lowest mode is right under 10Hz, and 13Hz is a dip. Perhaps having the seats elsewhere would change this, but the sofa stays where it is, so it's on to adjusting frequency response for where we'll be sitting.
My EQ took a house curve of 10db from 80-40hz and leveled out from there. Here's what they look like after:
The average measurements look good after EQ'ing, very smooth (these charts are w/o smoothing), but the difference in seating positions do seem notiicable for the 40-50hz and the 65-75hz ranges. Would bass traps help with this, or would the effort not make a big deal?
After taking the last set of measurements, I ran MCACC a few more times until I was happy with overall sound and sub / speaker integration, and then turned the dial on the 1850 up just a hair for a slightly hot sub.
I do like the sound. I probably want to do something with the windows as window rattle is significant at the lower frequencies before looking into bass traps. Still, It is very cool though in that the sub starts rattling things perceptably @ 9Hz.
Music sounds fantastic, bass slams where it needs to, but the sub never seems "boomy". For movies, what can be said that people don't say about subs with volume & low extension? It's funny - movies like Pulse and LOTR which are often held as benchmarks that stress subwoofers just don't seem to challenge this like they did my Focal or any of my purchased subs. Other movies like Black Hawk Down, How to Train Your Dragon, and of course War of the Worlds stand out even more as sub stress tests. WOTW makes me fear for the house if I go above -12 on the main volume now, and the sub still doesn't sound like it's working too hard.
I don't know if the sickness will push me to do another of these anytime soon, but this was an enjoyable experience. And that said, I am very pleased with the results.