I just got a pair of JBL S38IIs and I'm in love (Yes, I know they're not unbelievable/expensive speakers, but for someone on a budget, they're pure bliss)
I have to agree with Khoa... my local THX theaters with JBL speakers sound the best. Simply phenomenal.
I always try to go to ONLY THX certified theaters, as I find that they usually sound drastically better than non- THX certified theaters. And they are almost always equipped with JBL's, from what I've noticed so far.
Back in the 40s, 50s and 60s, the Altec-Lansing A7 "Voice of the Theater" was the legendary theater speaker. It was discontinued in the early 70s. Altec speakers and amps were pretty much the standard of the industry at that time.
Interestingly, Altec has just announced they are once again going to manufacture it for use in high-end home theaters. This speaker system just screams "theater" and I sure wish I had the means to have a big enough HT to house some of these.
In case you're not aware, the JBL speaker line was started by James B. Lansing. He was the Lansing in Altec-Lansing, and apparently they split up. The JBL speakers, after they split up, sounded very much like the Altecs.
I was a movie projectionist in a movie theatre and JBL speakers along with Crown amps are pretty much the standard in the mega-plexes these days. They usually have clusters of 18 inch JBL subs behind the screen etc.
I actually worked in a movie house that was mono and they had one huge (about the size of a fridge) Altec-Lansing speaker and as Deane mentioned their logo was "Voice of the Theater"
One other movie house that I worked in had Boson Acoustic A70Ts for surrounds. That movie house did an upgrade and I actually ended up with 4 of those A70Ts that I currently use as mains and rears in my HT. They sound great (at least to me anyway).
The surrounds and centres they use in movie houses aren't much different from the speakers that are used in home theatre...pretty much the same impendence and specs…
at my local theater, AMC 30 at the block....they turned up the subs REALLY REALLY hot...during music passages at the beginning before the feature, you just heard boom boom boom it's really annoyying....luckily during the movie it doesn't sound like that....just pure earth shaking bass....=) oh yeah all JBL btw
Thats about all I know of. JBL Pro really is the Microsoft of the cinema world.
I own a 4648A-8 cinema bass cab and when I needed help with it, they did not screw around. These guys know the trade and actually help you. I would gladly do business with them again.