The AEA Stereo
Microphone Positioner (SMP) was first conceived
as a device for mounting a stereo pair of Coles 4038 ribbon microphones.
However, it soon became evident that we could design it to provide a secure
and versatile support for microphones from almost any manufacturer — even
the heavy large diaphragm condensers which
ordinarily will not fit on a conventional “stereo bar”.
The SMP consists of a sturdy one-inch wide hard-anodized
aluminum bar with a non-reflective matte black finish and three microphone
sliders. The bar is available in three sizes, the SMP-17(17
inches), the SMP-1M(one meter)
and the SMP-1.25M(1.25 meters). The
bar is engraved across its length in 2.5-cm increments. With zero
at the center, these markings designate the distance between the sliders,
with special markings to indicate the 17-cm spacing unique to the ORTF
stereo system. The sliders are marked around the circumference at
0 , +/-30 , 45 , and 55 degrees. These represent included angles
of 60 , 90 and 110 degrees respectively between the microphones,
and may be used to facilitate exact and repeatable positioning of any conventional
stereo perspective. Each slider is fitted with two thumb-screws to secure
it onto the bar. Extra-wide locking microphone positioning rings are provided
for each slider, and one female threaded coupler is included to allow the
SMP to be mounted on a microphone stand or boom.
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For more complex
microphone arrays, additional sliders may be ordered separately (AEA
part no. SMP-S ). Multiple SMPs are combined to create the AEA
Mini Tree, "Decca Tree" and Super Tree arrays.
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