Bottlehead Forum

Posted by Dyna Saur (A ) on September 22, 2005 at 10:40:11

In Reply to: Re: Cheap Bookshelf Ideas posted by Paully on September 22, 2005 at 10:14:01:

The Specifications and Thiele/Small Parameters apply here:

The parameter that relates to box volume is the Vas which is the overall "compliance" of the speaker. This is defined as the volume of air that has the same compliance (or springiness) of the driver.
This can be used to determine the proper box size/volume for a woofer. Tweeters and sealed back midranges do not have a Vas rating.

If you're using a Parts Express catalog, they have tables giving all the parameters and the recommended sealed and vented (ported) box volumes, this is good reference any which way, and can be found on pages 147-149, and 186-187, in the 2005 Parts Express catalog. This can also be found through the Parts Express website, they have the catalog in PDF format and individual pages can be opened and printed as needed.

HTH

/ed B in NH

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