Davehrab is correct. Dimensions which are exact mutliples do tend to reinforce or boost the same frequencies and create dips in some others -- in a 9x15x21 room, those boosted frequencies are at 188 Hz and 377 Hz with some fairly big gaps or dips in the ranges of 81-107, 161-188, 188-215 and 269-296. If the dimensions are off a bit (e.g., 8'9" rather than 9'), it will affect these in a relatively positive way. My understanding is that anything above about 300 Hz is not a big deal so the only real peak is at 188 Hz and that could be managed with specialized treatments. The 27 Hz gaps might be a bit of a stickier problem. Rives knows more about this and will undoubtedly have more to add. Feel free to ask questions though and I'll give it a shot as will other more learned Audiogoners. Good catch Dave.
Speaker placement for 2-ch AND 5-ch same room
I am building a dedicated room for my gear. I have reasonable architectural freedom, but not unlimited space. Right now we're looking at 15 x 21 x 9 or thereabouts.
I have suddenly realized that I have enough equipment to install two separate systems, one for 5-ch and one for 2-ch. I'm looking for advise as to how to position the speakers. The 2-ch mains are MartinLogan Odysseys; if we go with two systems, the 5-ch mains would be ML Scenarios with Cinema center. The screen is retractable and automated, so I could have the screen drop in front of the Odysseys and place the Scenarios outside of them and slightly in front. I think that putting the big Odysseys outside the Scenarios would start to put them too close to the sides of the room (screen is 92" diag = 7' 6" wide plus tensioning).
My priorities is 2-channel, but I got WAF by making the 5-ch movies work well.
Any other suggestions? Am I nuts?
I have suddenly realized that I have enough equipment to install two separate systems, one for 5-ch and one for 2-ch. I'm looking for advise as to how to position the speakers. The 2-ch mains are MartinLogan Odysseys; if we go with two systems, the 5-ch mains would be ML Scenarios with Cinema center. The screen is retractable and automated, so I could have the screen drop in front of the Odysseys and place the Scenarios outside of them and slightly in front. I think that putting the big Odysseys outside the Scenarios would start to put them too close to the sides of the room (screen is 92" diag = 7' 6" wide plus tensioning).
My priorities is 2-channel, but I got WAF by making the 5-ch movies work well.
Any other suggestions? Am I nuts?
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- 9 posts total
- 9 posts total