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Author Topic: IMAX Surround Speakers Michael Brown Phenomenal Film Handler Posts: 1522 From: Bradford, England Registered: May 2001 posted 01-30-2009 10:04 PM                     Ok. I've been to two IMAX locations. One in Bradford and one in Manchester. In both these auditoriums I noticed that the surround audio is supplied from 2 huge speakers, one in each back corner of the auditorium. (rather that having say 10 or so smaller speakers spread over the back and side walls as is common in 'regular' 35mm auditoriums?) Is this a standard feature for IMAX? Why is it done this way?  |  IP: Logged Paul Linfesty Phenomenal Film Handler Posts: 1383 From: Bakersfield, CA, USA Registered: Nov 1999 posted 01-30-2009 11:41 PM                     This arrangement is standard in every IMAX Theatre I've ever been in. The only slight exception was the original Los Angeles Science museum IMAX (replaced by a larger one). This was the only THX certified IMAX anywhere and had two of the JBL THX certified stage speakers on the back wall (not in the top two corners).  |  IP: Logged Gordon McLeod Film God Posts: 9532 From: Toronto Ontario Canada Registered: Jun 99 posted 01-31-2009 07:58 AM                     Imax like quintaphonic wanted to maintain a directional point source in the surrounds  |  IP: Logged Joe Tommassello Jedi Master Film Handler Posts: 547 From: Coatesville, PA, USA Registered: Jan 2008 posted 02-04-2009 09:17 AM                  Quintophonic Sound? Was that ever used for anything other than "Tommy"?  |  IP: Logged Louis Bornwasser Film God Posts: 4441 From: prospect ky usa Registered: Mar 2005 posted 02-04-2009 01:47 PM                        Basically that's it unless you include "Sound 350" fro Damnation Alley (Fox's big hit that was bested by the original Star Wars. (4 tr mag with 3 large left wall-right wall-rear wall Altec A-5's) Louis  |  IP: Logged System Notices Forum Watchdog / Soup Nazi Posts: 215 Registered: Apr 2004 posted 06-12-2011 01:08 AM                 It has been 857 days since the last post.  |  IP: Logged Fenix Huang Film Handler Posts: 3 From: Perth, WA, Australia Registered: May 2011 posted 06-12-2011 01:08 AM                     Hii Michael, In re to those speakers arrangements. Every Speaker – Clusters are to be placed in the order below : 1. Channel # 1 Left rear (theatre), 2. Channel # 2 Left screen, 3. Channel # 3 Center screen, 4. Channel # 4 Right screen, 5. Channel # 5 Right rear (theatre), 6. Channel # 6 Top Center screen, A special power subwoofer for the deepest lows with (six) 6 x 800W (18”) for Medium Efficiency Extended Bass in a 16-cubic-foot enclosure (a cabinet size of a caravan) is provided to extend the range of the main channels and reproduce such sounds as rocket launches, thunder, close-flying aircrafts, etc. at a volume which approaches that of the original sound source. The enclosures include a filtering labyrinth IMAX ® patented design that physically traps the higher-frequency components that can otherwise cause overtones and distortion. Each driver has its own amplifier, with average 600 Watts each for the woofers, 250 Watts for the mid-range and 40 Watts for the Bi-Radial® Design tweeters. Built into the amplifiers are adjustable corrections for high-frequency screen attenuation, horn response and time alignment. Frequencies below 80 Hz go to a separate 4,800 Watts sub-bass system with 6 x of the above 18-inches 800watts power subwoofer in that large caravan alike enclosure. I saw the ones in OmniMAX Singapore are 8 powersubs enclosure, then become 10 units stacked soo tall. Truly amazing. The IMAX Keong Mas Indonesia, use the same arrangement but sits like 930 people!!!! It was soo crowded and soo hot. It didnt feel like IMAX hohohohooho but more like football stadium. Now HOYTS digital IMAX claimed their subs can blow candle lights. The original IMAX subs blow not only just the lights but also the candles!!! The air blown from these powersubs are insane. Cheerz  |  IP: Logged Jonathan Goeldner Phenomenal Film Handler Posts: 1360 From: Washington, District of Columbia Registered: Jun 2008 posted 06-16-2011 04:24 PM                     so are Hollywood films remixed for the speaker configuration of IMAX screens? I know of only one that was quasi advertised as such: the first 'Transformers' movie. While IMAX only features two channel surround sound, I thought the sound on 'Avatar' featured alot of phantom imaging between the left and right surrounds - very impressive!  |  IP: Logged

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