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Using an array 3 units wide and between 2 and 3 units
high will nicely treat the rear wall where the most
direct energy can be diffused. This will reduce
the severity of reflections that hit your other three
walls.
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Another example of effective use of a minimum number
of units is on either side wall directly across from
the listening position. It's a good place to start.
You can add more in the direction of your loudspeakers.
Usually an array of 2 units in width and between
2 and 3 units in height are ideal for side wall applications.
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If you're primary concern is depth of sound stage,
then probably the best place to start is the front wall
behind your speakers. Reflections from all other walls
eventually hit this critical spot and then pass by your
ears a second time, - something you want to prevent if at all possible.
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This is considered and excellent set up. The
effects of treating all four locations is cumulative.
Reflections get diffused over and over. This
arrangement uses a total of 9 units on the front wall,
6 on the rear wall and 4 on each side wall.
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These units can be rotated. Using them vertically
as shown in the middle of this array, will diffuse sound
into a horizontal pattern. This is most effective
on the center of walls where the reflections come from
other walls.
Rotating them for horizontal use will diffuse sound
into a vertical pattern. This is most effective
near floors or ceilings. The sample at the left
shows a typical array one would use for complete floor
to ceiling treatment.
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Even an arrangement like this can work if the walls
without diffusers are soft (treated with hanging
rugs for example)
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In free-standing applications you can experiment
with a variety of placements. Handy if you don't
have lots of units or the wall space. Whenever arrays
are free-standing, we recommend gluing the 12 inch
acoustic foam tiles to the back. This turns the
back into a pure absorber. You can experiment
with flipping the units around to hear and understand the
differences between absorbing vs. diffusing sound.
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See high res. image here.
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If you're in a basement listening room with a low
ceiling, or any room that uses a suspended ceiling,
you can make dramatic improvements by using these in
patterns across your ceiling by simply placing them
into the suspended ceiling grid instead of ceiling tiles.
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