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Post by marcl on Feb 7, 2021 13:22:42 GMT -5
line source / Maggies don't radiate much to the ceiling OR floor......or the sidewalls. They are fairly 'beamy' as frequency goes up. The ribbon probably doesn't interact with the side walls at more than 20db down from primary response. Front / rear waves of such panels CANCEL basically at the plane of the panel edges. You can easily TEST this by moving your ear front / back and note the 'null' right at the panels edge. CLOSE the other ear, please! Here is the STEREOPHILE measurement panel from the new LRS speakers. Others should behave in a similar manner. Magnepan hasn't doesn't anything 'big' in 40 years, but has instead refined and improved. www.stereophile.com/content/magnepan-lrs-loudspeaker-measurementsIn the Rooze arrangement, I have used absorbers to block the front wave and the back wave to see how much above the bass makes it around the edge of the speaker to the side. With the edge of the speaker pointing at the MLP and the main sound coming from the bounce from the side wall, there is still interaction of the "primary" front and rear wave at the sides ... yes, albeit significantly attenuated in the higher frequencies. But with the Rooze you also have to contend with this ... the rear wave from each speaker can cross the room and bounce off the opposite wall. I had a measurable 18ms reflection in the right ETC which I tracked to originating as shown in this diagram. I stopped it with an absorber at the X. the left had no such issue because the reflection went out the door!  |
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Post by leonski on Feb 7, 2021 15:15:02 GMT -5
Is that With or WithOut the DWM mid-bass drivers working?
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Post by marcl on Feb 7, 2021 15:37:30 GMT -5
Is that With or WithOut the DWM mid-bass drivers working? DWM's are working. And at the moment they are positioned about 2ft forward of the location shown in the other diagram so the initial short positive wave aligns with the 3.7 better.  |
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Post by marcl on Mar 13, 2021 9:41:58 GMT -5
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Post by Gary Cook on Mar 13, 2021 19:29:17 GMT -5
What you have is what I call an Artifact. It would be difficult or maybe impossible to transfer what you learned to others. And few will go to that kind of trouble..... My question remains, but could probably be answered by watching a movie or listening...... What is a good reference movie? Any fans of Burce Willis in 'The Fifth Element'? Or even a good copy of 'Forbidden Planet'? I'd even settle for one of the horse race scenes from 'Seabiscuit'..... Several other entries in the 'good sound' and effects sweepstakes. You choose! Another Ridley Scott movie I find that has a better soundtrack than Blade Runner is Gladiator, it’s DTSX and the Colosseum scenes are amazing. Cheers Gary |
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Post by leonski on Mar 13, 2021 22:12:16 GMT -5
What about the ALL ELECTRONIC Soundtrack for Forbidden Planet? Some of those effects and the images have never been topped......
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