Cinema De Lux Build
I started my home theater build back in Aug 2016, but I haven't been posting anything because nothing was really different than anyone else's till recently. I have always loved Art Deco and it was a dream to build my own Art Deco theater; it is finally coming true. Like many others on here, I have researched a ton online and within these forums in particular; I've been inspired by quite a few things I have found on here and adopted them for my build. I'll be sharing all of my progress so far, but I am going to start with a question first.
Knowing I always wanted to have my own dedicated theater, I kept a bunch of home theater magazines over the years and in particular, a whole series from Home Theater Magazine. Within there was an article about the perfect room dimensions, including an excel spreadsheet calculator that will tell you what all of the room nodes are up to 300hz. Also in there was how to place your seats to minimize volume differences among the seating positions. I recreated the spreadsheet and played around with my dimensions within my available space to find what would work best. I ended up with a room 11.5 feet wide, 14.5 long and 6.8 tall, which is almost exactly what I built inside my finished space, allowing for .5" or so of variation on any dimension. One of the key seating details is to put the seats so your ears line up on an odd, not even, dimension, such as 5/9th or 1/3rd. Same with the speakers, I should place the speakers so their front baffles are on an odd dimension.
How does this theory work when your front speakers are built into the front wall, behind the screen?
Due to various design choices/limitations, my two rows of seats are at the 6/11ths and 9/11ths positions. The problem I am having is that the second row of seats has drone/boom around 50hz that the front row doesn't have. According to the spreadsheet/math, I shouldn't have a major difference at that freq at these locations; but that assumes my speakers are mounted into the room, not on the front wall. I can't move my speakers, but I do have some flexibility in my seats. Just by walking around the room, I can't seem to find a spot where both rows sound the same at that freq, drone or not. My back row is about 32" from the back wall, just an FYI. Any suggestions about what I should do to help? I will be using the Audyssey room correction built into my receiver, but I know it's best to fix as many physical problems as I can first.
Below is what my front wall looks like just to help picture it. The baffles stick out by 7 inches from the drywall.