At 2:51 PM -0700 1/24/07, Bruce Wilson wrote:
>Before I perform the experiment with my NT2000's, does anyone have
>experience with large diaphragm mics at very cold temperatures (-15 to -5
>C)? I'd hate to have a diaphragm contract enough to break or permanently
>stretch.
>
>Bruce Wilson
>http://science.uvsc.edu/wilson
>
I don't think there's a big risk other than learning more about your
mics "personalities." I've set out my two sets of NT1-A's when its
well under zero degrees (F) for days at a time on probably a dozen
occasions with no ill effect. Its dry at those temps. However,
another set of NT1-A's the school owns will eventually emit a high Hz
whine after several hours. One of my NT2000's (2500's serial number)
will produce a predominantly low Hz "roar" after several hours of
exposure to cold, moist air, but my other NT2000 (5900's), sitting
along side, remains unaffected. All of the "bad" mics have recovered
once dry and warm and show no damage such as failing sooner the next
time. My hope is I can find a higher serial number mate for my good
NT2000, but I fear I might be rolling dice. With those I have tested,
the mic tends to be resistant or not. Perhaps there are unique
factors/tolerances in mics that a scientist of your caliber could
account for! ;-) Rob D.
--
Rob Danielson
Peck School of the Arts
University of Wisconsin-Milwaukee
http://www.uwm.edu/~type/audio-art-tech-gallery/
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