what does "Sd" stand for in Polk Audio measurements?

  • Thread starter Thread starter Ryan B
  • Start date Start date
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Ryan B

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Cause I was looking for the measurement requirements for a sealed enclosure for the db1040DVC, and it has "Sd: 54.25 sq in/350 sq cm", but also other measurements....

here is the link...

http://www.polkaudio.com/caraudio/specs/10inch/speakers/db1040dvc/
 
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