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Hi all.
I frequent another site where the mantra is absorption...absorption..absorption. Here it seems to be diffusion. Martin Logan owners seem to preach absorption while Maggie owners seem to preach diffusion. Both are dipoles. Why the difference do you think? It would seem that in both cases you are trying to deal with a rear wave.
Thanks Tim
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Diffusion is louder than absorption so that might be a significant factor in forming a preference.
I find diffusion behind and absorption beside works great. Obviously really depends on your room size, speaker placement, etc.
diffusion behind the panel has the effect of seeming to increase the distance TO the wall.
The extra time gives the image from the front 'direct' wave a better chance while not turning to sonic mush when mixed with the back wave / reflection.
Too much is never enough
My assumption is that the manufacturers differ in how they voice the speaker and the assumptions on how the speaker and the room integrate. The assumptions are co- dependent.
Specifically, I would say Magnepans are designed to sum or combine the rear and front waves within a given ranges of distance. The down side of this is comb filtering effects, which can be reduced via diffusion or greater distance. There are other ways to design a panel, which involves suppressing the rear wave. I assume ML chose this path. The different woofer technology certainly changes their design parameters and limitations.
These are assumptions though.
from experience I found about half the back wall should absorb when using Maggies, too much and the sound becomes 'dead'.
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