I've been watching the new Youtube series on acoustic treatments. My question is pertaining to the 'first reflection point' if you have your mains toed in past your main listening position. This was actually a topic discussed here: The goal in this is to make the sweet spot wider and in theory I believe it makes each position on a couch a 'sweet spot.'\n\nSo, if I'm looking to treat the first reflection point am I not now trying to place treatment for the speaker on the opposite side of the room? The closer speaker to the wall can't really be projecting sound at that wall. \n\nFrom what I gather so far if you ask a dozen acoustic treatment people the same question you will get a dozen different answers. So, maybe this is a pointless question. \n\nIf it helps understand at all - I have a room that is about 12 x 17 with 8 foot ceilings. One side (call it the right side) opens up into another room with a large 6 foot opening and the other (left) a simple doorway size opening. My right main is in front of a big window with a curtain behind it. The left main only has about a half a foot less space to the wall on that side of the room with a solid wood door taking up some of that space behind it. Both have about 5 feet give or take from the side walls. \n\nI pretty consistently find that I have to pull down the right channel about 2-3 db and maybe boost the left 1-2 to keep the sound stage centered. No more than 3db total generally. It's just so weird that it's not always super consistent. I might zero it out and with some albums it may sound fine, but with other albums it is clearly off-center without adjustment. \n\nI thought maybe my uneven length and different speaker cables played a role. I replaced those with some even lenght Bluejeans speaker cables and it sounded better, but didn't fix it. I also had a bigger and more solid media rack on the right side and I recently replaced that with an open style very short rack and that really didn't fix it either. So, I'm thinking that the large opening into the other room probably plays a big role in it, but that the absorption from the curtains might add to the uneven soundstage that favors that side. \n\nI ordered a couple of absorption panels. I got a 24"x48"x 2" deep for directly behind the left speaker. I got 2" because I'm afraid to take away a full 4" from behind it to the wall. The right speaker has about 16" to the curtains (not the window) and the left has just less than 20" (to the solid wall behind it). I guess I could have gone 4" behind it. \n\nI did order a 24" x 48" x 4" that I have intended to use for that first reflection on the side wall where I have plenty of room for a 4" panel. Is that a total waste of a 4" panel or will it work to absorb some ambient sound waves in the lower frequencies from the room in a beneficial way? I'm guessing not nearly as much as it would directly behind a rear ported tower speaker. \n\nI ordered the 2" in black to blend in behind the speaker and the 4" in white to contrast with the color of the walls. So, unless I change the order it's not going to be easy to swap them around. Maybe I should just change it to make them both 4", but that's going to start really eating up the distance to the wall for that side. I'm questioning the pros vs cons of that. \n\nI do not have a calibrated mic for REW if anyone wants to know that. I've only used Audyssey for room correction. It does reflect a few dips\/spikes around the 100hz region that it claims to be smoothing out, but I suppose without running REW I don't really know how well it actually is doing that. I also haven't yet attempted using bass traps. I'm frankly a little stunned at the prices being asked for some of this stuff. For what appears to just be some foam. Some of the Amazon offerings aren't getting the best reviews for quality of what you get for the cheaper stuff. \n\nI would sure like to fix the uneven soundstage issues. It can be irritating to have to make those adjustments so frequently.