On 3/30/2016 1:48 AM, OFWW wrote:
On Tue, 29 Mar 2016 21:48:19 -0400, krw wrote:

On Tue, 29 Mar 2016 14:12:26 -0500, Leon lcb11211@swbelldotnet
wrote:

On 3/29/2016 1:20 PM, John McCoy wrote:
Puckdropper puckdropper(at)yahoo(dot)com wrote in
b.com:

Leon lcb11211@swbelldotnet wrote in news:d-ednSYZkf_9JmfLnZ2dnUU7-
:

That is not true either. Long ago many speakers were built to be air
tight. Case in point many subwolfers use a driver speaker and a
slave speaker inside the same enclosure. The whole speaker assembly
is dependent on being air tight for the slave speaker to function and
produce sound.

What would the slave speaker tend to look like? Basically like a
speaker without a magnet? I picked up a speaker from Walmart that had
one real speaker and one that kinda looked like a decoy or fake
speaker.

Slave speaker is a special case - in that case the slave is
moving outward when the driven speaker is moving inward, and
vice-versa, so the volume of air inside the enclosure doesn't
change.


The air volume does not change in a sealed speaker either. The pressure
does change but not the volume.

The volume of air obviously changes as the volume increases. ;-) The
quantity of air is constant, the pressure is changing, so the volume
must change (inversely). Remember, the speaker cone is moving.

Yet if there is no vent the volume of air does not change, only the
pressure changes. So the sound is dampened in that the speaker is not
free to fully travel, unless it is a metal coned speaker. I believe
that is what Leon was referring to.

Yes, speaker cone movement in a sealed enclosure neither creates or
eliminates air. It simply compresses and decompress the air.