Yes its for real. Aperiodic emclosures are not the most common for car
audio booming though, more of a SQ application. Search the termpro.com
forums for "aperiodic" Lots of info archived there.

I have a pair of 12s and a 15 on order and will attempt an aperiodic
design in my hatchback, venting the aperiodic wall into the spare tire
well, sealed from the interior.

read my previous post for url links on Richard Clark and Harry Kimura.
Garrett

wrote:
http://www.usdaudio.com/tutorials/ap-tut1.php


has anyone ever listened to this setup before? Does this work good?
Has anyone delt with this before? Are these "mats" expensive?
Would it work with 8" subs????