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In Reply to: RE: Some grammatical acoustics concerns… posted by siramazing on February 18, 2008 at 10:41:51
Getting the writing right can be difficult :-)
I'm confused again. You say the "opening is about 18 feet long on the left channel side" but you previously said "there is an entranceway to another room where the listening chair will be". From the original statement I gained the idea that the entranceway was on the wall facing the speakers but now I'm uncertain as to whether it's in that wall opposite the left speaker, or on the left wall, or perhaps a bit of both with no corner on that side at all.
If it's in the wall facing the speakers, I'd be inclined to leave it open, especially if the listening position is well away from where the wall ends on the side facing the right speaker. What it means is that the physical rear wall is going to be a long way away, on the other side of the dining area, and that can be beneficial since it means that the travel path for reflections from that wall is going to be considerably longer than the direct sound travel path and the reflections from that wall will be much weaker as a result. The bigger space will also assist in the natural development of some diffusion in the listening area. The problem is that the bigger space will 'soak up' more sound and you may have to play things at a slightly higher level in order to get a satisfying volume level and that may require a bigger amp if the space pushes your existing amp to its limits or close to them.
On balance, however, bigger spaces are better than smaller spaces for a number of reasons and I'd be reluctant to 'waste' an opening of that size by partially closing it off unless I had very good reasons for doing so. I'd definitely be trying things first with the opening left unimpeded before I started looking at trying to close it off to some degree. I would have a different view if the opening was the size of a normal doorway, and I'd recommend fitting a door if possible in that case, but with an 18' opening I'd really try it without doing anything else first.
Depending on the size of the wall area on the right side of the room you might wish to put some absorption there so that wall area is less reflective in order to balance the opening in the rest of the wall.
David Aiken
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