Posted by Wayne Parham on February 17, 2003 at 01:06:12

In Reply to: Adjust size of 3Pi or 4Pi cabinet if placing horn outside? posted by Patrick Kopson on February 16, 2003 at 19:44:59:

The volume that's displaced by the HF horn - about 250 cubic inches - is only a tiny fraction and is of little consequence, especially on the larger model speakers. Certainly, it won't hurt to offset for the change in volume but in practice I'd only do this for the very smallest speakers.

On something the size of the Theater Series four π Speakers, the volume displaced by the HF horn is just too small to change system tuning and you can safely ignore it. Changes in humidity will do more to change system tuning than a change of volume that's this small.