What does Vas stand for?

[<motoxrtumper>]

i have been looking into some subwoofer specs and i was just wondering what Vas stands for.

for example i found a sub that says Vas 2.68 cuft

i guess it could stand for volume air space and the cuft means cubic feet but im not sure

thanx

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[duginnz 10+ year member]

each brand of sub needs a certain box size to get optimum results. Vas is the inner capacity of the box required for that sub to give max output at a stated frequency, usually bout 80 hertz.

if you are going to use a sealed box, you can deviate from the exact sixe by 10 or 15 % without too much drama. if you pick a ported box, follow the instructions to the letter.

 

[stones 10+ year member]

From what ive read, i believe VAS means the point in which the sub will play like its in a free air enclosure. I.E. if a subwoofer has a VAS of 3.0cft, than a 3cft enclosure(sealed) would be the equivilent of a free air design. Why?, because a large box doesn't provide the same air suspention on the woofer cone that a small one would.

Im pretty sure this is right, if im wrong im sorry.

-Stones

 

[ramos 5,000+ posts]

Vas stands for "Equivalent volume of compliance"

This is a volume of air whose compliance is the same a the speakers acoustical compliance or Cms. To better understand check out this site. I think you will find it very informative.

http://www.electronixwarehouse.com/education/speakers/theil-small.htm

 

[chozen1 10+ year member]

do a search

its a good tool

 

[JimJ 5,000+ posts]

Thank you for that...but this is a four year old thread.

 

[chozen1 10+ year member]

can someone close this