The THX baffle wall is one of the integral parts of the THX sound system in cinemas that creates some part of the movie magic experience it not only improves of frequency response of the loudspeaker array that is placed into the flush barrier wall but it is also covered High frequency absorbent material so prevent high frequencies bouncing of the screen and then returning back to baffle wall creating a harsh tingling sound that makes the soundtrack too bright.
You can learn more about this in this video interview with Tomlinson Holman.
THX baffle wall and mathematics!
http://delivery.acm.org/10.1145/1040000/1037867/supp/tomholman2.mov?key1=1037867&key2=8920747611&coll=G UIDE&dl=GUIDE&CFID=3242816&CFTOKEN=92081103
Here’s a few pictures to get total understand of what it looks like.
Another view of the THX baffle wall and yes those are JBL loudspeakers.