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In Reply to: RE: Mmg's what type of wall treatment behind them works best posted by DTS ma 7.2 on February 03, 2016 at 18:19:20
get the away from the wall, at least 3 feet if you can. then consider diffusion.
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In round numbers, sound travels at one foot per millisecond. Studies have shown that reflected sounds should be delayed by 10 ms or more from direct sounds to preserve clarity.
So this suggests at least 10' becomes the critical distance. Thus, with most speakers (except those with narrow dispersion) the distance from speaker to sidewall to the listener's head should be 10' greater than the straight line from speaker to head. If not, placing absorption at the reflection point may be beneficial.
In the same way, because of the back waves from dipole speakers, they should be at least 5' from the front wall to be delayed (back to the wall, then bounced forward) adequately from the front waves. Thus, many owners prefer placement well out into the room. When the 5' minimum is not possible or acceptable then, as suggested, diffusion can help.
Notice I refer to the "front" wall as this is in front of the listening position where I'm making my observation.
"You can't know what the "best" is unless you have heard everything, and keep in mind that given individual tastes, there really isn't any such thing." HP
I plan to move my 1.7's 10-12' away from the front wall.The front wall has a large window with vertical blinds.What would you do to with that situation?Thanks,
Dave
At that distance rear wall treatment becomes much less critical. You could play with some diffusion, but nothing really needed I think.
My 2 cents on Maggies....
At less than four feet from the FW you get irritating comb filtering and need diffusion.
At more than five feet you start getting gradual softness in the dynamics but you gain oodles of sounstage depth. This trade-off continues as you get further and further out. The soundstage depth phenomenon is not free -- it comes at a cost. Tradeoffs.
At six or seven feet out diffusion and treatment of the FW adds increasingly less value and can even contribute more to the loss of dynamic snap.
Each of us tunes our planars to our preferences and room (for example windows on FW, require more space and treatment)
Oh, and to complicate it, the balance and tradeoffs differ by model. I suspect newer "i" models are being designed specifically to work better closer to the FW. The best sound regardless of cost award by JV at TAS at last year's AXPONA was given to 3.7i's within two feet of a heavily treated FW, and even closer to the SW. They sounded awesome. My theory is that Magnrpan is trying to make their speakers more spouse and home theater friendly.
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