Ok, this probably sounds dumb, but I'm curious how one determines "room size" in a situation where a room opens up to other areas as it pertains to things like room modes and the like. I know the real answer is "measure, measure, measure" with something like REW rather than just guess by sizes, etc...but...humor me.
Here is an image of our family room (it's old, and some of the equipment has been since changed, but...).
The image has been taken from the adjacent dinette/kitchen. You can also see the french doors in the room, which open to a living room.
The question comes in determining how "big" the family room really is. You can see in the image that there exists some boundary reinforcement due to the half-wall and arched entry, but there's also the very large opening between the two rooms. Further, I wouldn't say the french doors themselves add a whole lot of boundary reinforcement, though they do rattle "nicely" with the bass, ugh....
The family room itself measures 15' wide by a bit over 19' long (speakers fire down this direction) with 8' ceilings.
The kitchen/dinette area that it opens to is about the same size (a few feet longer) and opens itself to the foyer, dining room, etc.
So, when calculating room modes, because of the half-wall adding some boundary gain, would I use the 19' length, or, because of the really large opening, should I use the 40'+ length added by the adjacent kitchen area?
Further, would having those french doors (and the leakage they allow) add even more volume?
With regards to acoustical treatment, I suppose I should focus primarily on the family room area itself but would adding treatment to the adjacent rooms (if WAF will even entertain it) help at all?
Moreover, lacking a full rear wall, the couch position is sort of in the middle of the "room" as a whole (which I suppose is not ideal), but if you count that half wall as a rear wall, then we sit right against the rear of the room.... So...how's that all work out?
Overall, I guess this room is pretty normal, but just wondering what the half-wall and french doors do to us in terms of its overall acoustic behavior, if anything.
Also kind of curious what you all may recommend doing to optimize a room like this for a 5.1 configuration (with a heavy focus on 2ch. music). Currently, I have the speakers pulled out so their front baffle is around 3' from the rear walls and a little over 4' from the sides -- problem here is they are closer together than the listening distance which is about 17', so golden triangle ratio is way out of whack. Worse, I can't really pull them far enough apart, either they end up on the side walls (and the right one starts firing into the love seat) or I compromise. Plus, I'm not allowed to bring them further from the rear walls (to pull them close to the listener to assist with the triangle) because then they start to crowd the love seat (and I'd have to move the TV forward, too, and then waste a ton of the rear space of the room, which WAF doesn't like, lol). Moving the seating all forward is a non-option (wife wants the couch close to the half-wall)...so...what's the best compromise? I know it's all an experiment to position speakers, one which I'll start to undertake when I get new speakers, but before that experiment begins, I'd just like to have an idea where to start so I'm not just randomly moving 300 lbs of speakers around the room, lol.
Anyway...any suggestions, even "that room sucks, build a dedicated one and give up", I'll gladly take. I do have a full basement, so it's certainly not impossible to start over there...but, I'd certainly prefer to optimize this one since we're in it all the time.
edit: In case you're curious, here's an old shot from inside the room.
The furniture layout is unchanged, but that dinky little subwoofer is now a Seaton Submerssive HP and I'm hoping once I go 5.1 to figure out a better solution than the (mostly) unused equipment stand (which pretty much houses my wife's nick-knacks and my currently unused Parasound amplifier) and way undersized TV stand. But, I lack imagination, lol.... I'm not sure whether I want to have something custom built or what... I really want to audition the JTR Noesis stuff and, if I like it, get the 212 and 228 for center and add another SubM-HP...but...don't know where to put it all. Plus, then eventually I want to get rid of the DLP and wall-mount a nice sized (80+ inch) set...but, then I'll have to push all the speakers closer to the wall...or fabricate some false-wall thing.... I just don't know what to do