IMAX Uncovered! Adam Rayner Gets Behind The Screen & Sees The BASS! 

"As dark as inside of a cow" got me laughing XD

your excitement is freakin awesome brother...!

It's largely about the ineffable TUNING and even ten times the power may not hit as hard without the room shaping but it sounds like I NEED to come check it out!

Love seeing stuff like this !

3:01 is that a bat? loool

holy shit was that a bat at 3:02?

Thanks, I just had this mad urge and am pushy enough to get to ask and see. I was just stoked!

They make their OWN specification drivers..they are IMAX ones!

bless you Sir!

good tour nice to see another side

Those subs look exactly like the EMINENCE LAB's!! thanks for a great video! Very cool

Well, it does do 23Hz at a mighty 120dB odd but if you check out others of my vids that have the word hair trick in them, you may meet Jenny Hummell and Edd Elson as he basses her at 157dB of 27Hz. That is bass beyond reason but IMAX is about the utter perfection of control and huge bandwidth and placement accuracy.

Looks like Eminence Lab12 drivers on the subs there.

Thought for sure they would use 15 inchers. The same that are used in concert PA systems

I have not, wow, it sounds like a worthy thing to come visit!

YES!!!!!!

wow, that's quite a synthesis you got going on there...as well as all your own stuff. I'm only mere by comparison, dude!

Thanks. Each 2 12" drivers have the radiating area of 1.26 sq ft.So the total SW radiating area in this Imax is 10.08 sq Ft. The HPS-4000 system at the RPX Arkansas has 8 Fully Horn loaded Sub cabinets with 10.25 sq ft radiating area each. That equals to a total of 82 sq ft. 82 sq ft compared to 10.08...With all due respect but as you can see the Imax gets completely dwarfed when it goes up against HPS-4000. As a theatre sound lover you owe to yourself to Hear the RPX in Arkansas

In this one, there were four cabinets, so SIXTEEN!

I would love to...not sure where my nearest one is.. I am in the UK - is that a USA only thing?

3:26 MAGIG WORD = IMAX! XD ;-)

Haha thanks! Interesting stuff!

What make of speakers do they use ?

23 hz? thats the spirit!

Went to see Paranormal Activity 4 there. Leather reclining seats and all. And they sell cheeseburgers in the threater as well as other items, first time I've seen that here in AR.

hey Adam i remember you from fast car back in the day lol

1:11 Can I learn more about that camera?

Wow, thanks, I just feel the same....... hence my attempts...

12" drivers is mildly disappointing. I suppose 18" would be more of a challenge to get 20hz though.

12" has advantages, they're faster acting than 18" or 21" cones, and the relation between motor coil size and cardboard size is better (12 in dia vs 5 in dia coil over 18" vs 5" dia VC, leading to reduced partial resonations, as a result lower distortion level. But the key here is different, they are still vented Helmholtz resonator enclosures with direct radiating speakers. One 18" has about 0.16 m² of radiating area, one 12" about 0.07m², so 2 pc. 12" cones replace in radiating area, or the area that actually tries to move the air. One new enclosure therefore replaces one of the old double 18 inch boxes. Even though they seem to close couple 4 enclosures, which helps to gain sensitivity and "air movement", the principle itself is not capable of shifting large air masses. The speakers try to move "quickly" with high velocity to shift air, that reacts like a huge, multi ton block of air, achieving very little efficiency, doubtfully any at 20 cps. (If you hit at 70 mph with your car to a 2 ton block of concrete, you won't move the block, but ruin your vehicle. If you try to shift with high force over the whole block and slowly it moves with a fraction of energy required energy required than your car at 70mph carries in speed.) So basicly you're in for an acoustic transformer, which converts high velocity low area to high area low velocity couple. These things are known among speaker makers for years, and various principles have been developed from horns to tunnel porting, ... They all are significantly larger, and that is why theatres try to avoid them. Space in shopping malls is expensive. Something 6 to 7 feet deep multiplied with the giant screen length, is a lot of "wasted" square feet to be paid for monthly. Up to 118 dB (at the reference position in 2/3rd room length, sometimes simplified to half room length) SPL unweighted is what we expect for the LFE channels in theatres. (They are low frequency FX channels, no "Sub-Woofers", as the screen channels have to be full range from "20 to 20k" anyway. The difference they have to offer 20-50 times the power of the screen channels at the same frequency. But you may be right, I had to learn that (L)I(e)max theatres these days use a "bass management" approach... The cabinets shown are about 94 - 95 dB sensitivity at 1 Watt 1 meter. Four of them might actually gain another 4 - 6 dB by mutual coupling. With 100 dB of brut sensitivity at 1 Watt in 1 meter, we require about 56 dB over 1 Watt at the reference position, or 400.000 times the 1 Watt. Something impossible for the system shown. And from the book of fairy tales at 20 cps. What counts is the total radiating area, in this case 16 cones at 0.07m² roughly gives 1.25m² plus some resonator port area, way below 2 m². My own "Home"cinema system offers around 10m² radiating area in a hall that is a fraction of the size. With a 1 Watt sensitivity about 20 dB higher... So there is real bass, flat to 25 cps. (It is not recommended to go really deeper, as body veines resonate in that region, and might rupture, killing your patrons by internal bleeding... I did not know, but was strongly cautioned by an internal medicine physician) sound waves at 20 Hz reach somewhat 5 m wavelength, making it very difficult in rooms, that have a finite length to stay without standing waves etc. Some blocks away from the source with a really powerful system, it might actually shake another building quite significantly like a quake. Within a cinema complex it might give a feeling "I actually prefer the movie next door" These are the limiting factors in design, and Imax is no exception. The surrounds are way too small for the room. They will clip at higher mid levels. All in all the Imax approach shown here is a LIEmax approach, ... But there is one thing I have to admit, at least where I live, the local Imax is the only spot to watch movies for a paid ticket. The rest is so far behind, that you feel cheated immediately. Imax offers a minimum in picture quality(the are places which offer way better D-Cinema images I know of, but no sound at all) combined with an impressive screen. The sound system in our Imax (beside the tendency of the personal to lower the reference volume by 6 - 9 dB at show times over calibrated reference, not Imax conforming, I know)is mediocre, lacking 1.5 octaves in bass and 1.5 in treble reproduction. Even Rouge one made the surrounds clip at reduced levels. In total the system seems to be too smal and too conventional. But this is making complaints at quite high level.

Have you heard of Regal Cinemas RPX Theater, we have one in Arkansas that seems to rival IMAX.

12's? I was expecting at least 18 inch drivers due to tke fact that my hair and drink shakes during the imax intro

let me guess?? 12,000 watts??

whats with london?

At 3:05 you mention 4 12" s in each enclosure. How many enclosures are there?? Not counting the stage speakers.

did a giant bat just fly into your face at 3:00

Is that the brand of speakers they use IMAX

Presenterbloke the best day to go imax is may 16th godzilla is coming out that day that movie would hit some low 20's

I think it is all of the orderof 20 thousand but IMAX stress that BHP is not what solely creates a Veyron! It is all about it being the most carefully tuned audio system in commercial use worldwide, in ANY application!

boy oh boy its bill bailey

Hope you had hearing protection.

Wow that is a small screen, lol. Look up Warren world class IMAX, that is what I am used to.

Hi Please let me know about one thing. Are these array of 16 x 12 inch subwoofers are the only subs connected? what about the 18 inch subs are they connected? Generally they might not be connected together so I feel only the 12 inchers are connected. A major question is that what would be the size of the theater in feet these speakers are installed? Like how many seater? That makes sense in the overall volume these subwoofers are able to cover. But I have done the simulation and found that it can achieve about 122db at 45ft at 200RMS each driver.

If you mean the Mccain Mall, that location is epuipped with the HPS-4000 sound system, and they have doubled their number of subs to provide 82 sq ft radiating area to blow even IMAX, sky high. Not to mention their strage speakers are more powerful and cleaner sounding than the IMAX,

I love Bat's.

I think it must be! There has to be a vent.....

Yes, but the 'viewing angle' was ALL YOU COULD SEE sort of thing. comes across as mahusive and immersive

Most cinemas now use jbl's with 2 18 subs

That theater looks upgraded as far as sound goes, but that screen is totally LieMax, lol. I've been to the real deal now.... IMAX Autonation Ft. Lauderdale Florida. IMAX Laser projection....top of the line. Oh it was good.... The Palm Beach location is still better than the theater in this video as it's not rectangular..... any IMAX screen that is a rectangle is LieMax. At least this video has the proper subwoofers and rear speakers. The little speakers on the wall indicate a former 5.1/7.1 dolby surround theater. That's also how you can tell LieMax... it was never built straight up as an Imax screen and has left over speakers. Too funny. Those speakers are not even being used... no sound comes from them.

Oh poor bat! It probably died in there with nothing to eat! D:

3:01 that was a bat?

WOW. That does sound impressive! The full feature on the interview I did with them has now been in the UK Home Cinema Choice magazine.... and I would love to hear the one you describe. Mind you, IMAX IS in many territories and the reliably same-level of awesome in each one, worldwide and they have been working on their EQ curve for 40 years!

its gaben newell haha

Hey..... you iz well old then!

But those woofers aren't used. they're just there

you sound like bill bailey lol

AHhhhh loooked it up. Sorry - world's most venerable multiplex corporation! And changed cinema here... but no mention of superior technology on their websites..

1:11 Can I learn more about that camera?