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Author Topic: John Allen: "All Seats Hear Stereo" Steve Kraus Film God Posts: 4094 From: Chicago, IL, USA Registered: May 2000 posted 03-19-2003 11:28 PM                    What is the basis of this new claim for HPS4000 by John Allen? Has anyone heard an explanation behind this?  |  IP: Logged Daryl C. W. O'Shea Film God Posts: 3977 From: Midland Ontario Canada (where Panavision & IMAX lenses come from) Registered: Jun 2002 posted 03-19-2003 11:33 PM                        I don't know how he's doing it, but I'm surprised he didn't do it before.  |  IP: Logged Brad Miller Administrator Posts: 17775 From: Plano, TX (36.2 miles NW of Rockwall) Registered: May 99 posted 03-20-2003 02:27 AM                     The basic info is at www.hps4000.com but it doesn't explain how such a thing is achieved. I meant to go back to the HPS booth on Thursday, as when I shot that video late Wednesday afternoon we were running behind in preparation for the FT drink. By the time Thursday came and went (shooting other booths frantically before ShoWest closed) I just knew this question would arise since I didn't get it on the video. Hopefully John can swing on in and explain it in more detail so it makes sense.  |  IP: Logged Larry Shaw Expert Film Handler Posts: 238 From: Boston, MA, USA Registered: Mar 2000 posted 03-20-2003 11:42 AM                        Aparently he has grafted ears onto the seats. Butt do the seats also have brains to interpret the sounds? What about noses? Would "All Seats Smell Stereo"? Scratch that. Does the seat have a coin slot so one can put in a nickel to activate all 5 sense?  |  IP: Logged Mark Gulbrandsen Resident Trollmaster Posts: 16657 From: Music City Registered: Jun 99 posted 03-20-2003 09:38 PM                     I have to say that I think he has gone overboard this time. Weather its in the shallow end or in the deep end remains to be seen...or heard. Mark @ CLACO  |  IP: Logged Gordon McLeod Film God Posts: 9532 From: Toronto Ontario Canada Registered: Jun 99 posted 03-20-2003 10:19 PM                     No maybe it is spread more evenly rather than just higher and deeper  |  IP: Logged Brad Miller Administrator Posts: 17775 From: Plano, TX (36.2 miles NW of Rockwall) Registered: May 99 posted 03-20-2003 10:21 PM                     I figured he would have responded by now. Anyway, let's give him a chance to explain how this works.  |  IP: Logged Steve Kraus Film God Posts: 4094 From: Chicago, IL, USA Registered: May 2000 posted 03-21-2003 01:05 PM                    Bottom line is that it is basically an aiming technique. It's an old idea written about long ago by Paul Klipsch and was tested back then by having subjects move to different places in the soundfield and chart the apparent location of individual musicians in a jazz group whose music was being played. Sort of an objective evaluation of subjective impressions. I haven't seen the research but I suppose if more people sitting in more places can better localize the individual sounds then there could be something to this. No reason to dismiss it without knowing more. [ 03-22-2003, 12:59 AM: Message edited by: Steve Kraus ]  |  IP: Logged John Pytlak Film God Posts: 9987 From: Rochester, NY 14650-1922 Registered: Jan 2000 posted 03-22-2003 04:48 PM                        Steve is correct that speaker aiming is certainly part of it. I only had a few minutes to ask about it, and John Allen did explain that the stereo image is greatly affected by the aiming, optimized for the dispersion of the particular speaker being used.  |  IP: Logged Michael Schaffer "Where is the Boardwalk Hotel?" Posts: 4143 From: Boston, MA Registered: Apr 2002 posted 03-22-2003 05:48 PM                        Well, the HPS surround arrays were probably the only ones I ever heard which actually FILLED the room with surrounding sound rather than throwing some effects in from the sides from time to time.  |  IP: Logged David Stambaugh Film God Posts: 4021 From: Eugene, Oregon Registered: Jan 2002 posted 03-22-2003 05:54 PM                        Wonder if he's using any kind of active processing like SRS or Q-Sound or something to enhance the directional effects. It's pretty amazing what some of those processes can do.  |  IP: Logged Mark Gulbrandsen Resident Trollmaster Posts: 16657 From: Music City Registered: Jun 99 posted 03-22-2003 07:22 PM                     Michael, I agree that the HPS surround does usually work well, but I've heard many other surround arrays work really, really well too. It all depends on if the array was designed correctly or not, and if the theatre is accepting to proper positioning and aiming of the surrounds. These are just a couple of the things one has to consider...these are usually the most difficult to acheive in an installation. HPS to my knowledge doesn't use any active stuff normally. We're still awaiting the Grand Pooba to reply on this though..... Mark @ CLACO  |  IP: Logged Gordon McLeod Film God Posts: 9532 From: Toronto Ontario Canada Registered: Jun 99 posted 03-22-2003 11:02 PM                     Considering that the published beam angles of the klipsh stuff that were the basis of the HPS had a narrow dispersion pattern than the JBL 4675 I question how that can be done. If you want true dispersion use the SA speakers  |  IP: Logged Steve Kraus Film God Posts: 4094 From: Chicago, IL, USA Registered: May 2000 posted 03-23-2003 03:28 PM                    Mark, if JFA is the Grand Poobah then I guess you'd be the *Grand High Exalted Mystic Ruler! Steve G can be The Great Gazoo. * I swear I used to think Kramden was saying "Grand High Exalted Mr. Gruler" which is even funnier.  |  IP: Logged Paul G. Thompson The Weenie Man Posts: 4718 From: Mount Vernon WA USA Registered: Nov 2000 posted 03-23-2003 04:18 PM                     I never had any hot-spot or directional issues with the Klipsch surround speakers if they were properly placed. I think they are excellent speakers.  |  IP: Logged

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