In article ,
thelizman wrote:

In theory, it ads 15-25%. In actual practice...well...you can make up
your own mind, but I've never measured any actual noticable change that
couldn't also be accounted for by other factors.

Actually, if you use the right density of stuffing, you do get about 15 to
25% effective size increase. The stuffing slows down the propagation of the
sound waves within the enclosure. The effect is more commonly used to
advantage in "transmission line" style home enclosures, allowing the use of
a shorter line for a given bass extension. I've got a technical paper
somewhere here with suggested densities for various types of stuffing. I
expect there'll be useful information on web sites that discuss home
construction of hi-fi speakers, too.

--
Don Hills (dmhills at attglobaldotnet) Wellington, New Zealand