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Posted by Romy the Cat on
11-19-2007
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Interesting idea indeed and very interesting crossover points. Denmark is generally is very advance country in terms of audio.
The Roundabout people said very little, is anything about their horns. However the is one subject that I do not like in there, even without knowing what they did and how the Roundabout installation sounds. Audio people are generally under impression that horns radiate Sound from mouth and whatever happens outside of mouth, and particularly behind is irrelevant. There is nothing could be further from truth – horns installations do feel the boundary presence as good as anything else.
The corner-loading horns are very tricky. They can do phenomenal LF equalization, develop wonderful tone and in lucky, hardly controllable circumstances, they can “load” room as no other topology does. However then all, with no exception produce a very idiosyncratic imaging that I call “far-field imaging” and mean thing about it is that nothing could be done to address it. The corner-loading might develop a superb depth of imaging but it still will be far behind a virtual “proximity line”, the line that in some way associated with wall between the speakers. It is superbly difficult to do anything with it. It is imposable to intentionally curve imaging with corner-loading or to extend presentation of events closer to listeners then this virtual “proximity line”…
 Romy the Cat wrote: | | It even more interesting that his Magico speakers are sitting right next to the wall. |
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I recognize it as a characteristic problem of any corner-positioned installation.
The caT
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Posted by drdna on
11-20-2007
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The idea of 360 degree radiation of sound has great intuitive appeal to me since I feel the best recordings are done with two omnidirectional microphones. The most precise reproduction of the musical event would seem to be: sounds enter microphone from all directions, then leave speakers from all directions.
Of course then there is the real world. Compromises in design and all the implementation problems. There was Ohm; mbl made a 360 degree electrodynamic speaker and there was another company that made a 360 degree horn guided tweeter and midrange with a traditional woofer -- I forget the name. None of them ever really impressed me with a presentation of sound that was dramatically different or better than a traditional forward firing system.
And then there is this. That when a recording is made, the sound of the room is recorded. With a 360 degree radiation pattern, we superimpose the sound of that room on the listening room. I suppose, we have to ask: WHY? What specific limitations and restrictions of the forward firing horn schema are we overcoming with a 360 degree dispersion pattern?
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Posted by horny on
11-23-2007
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I always thought there are only two basically interesting approaches to the sound reproduction:
- eliminating the room effect as much as possible with a controlled disperssion of a forward firing horn
- or completely include room (a bogus idea, I know) by means of omnipolar radiation pattern
(example below, Duevel Loudspeakers with omni radiating compression drivers) or bipolar radiation pattern (identical set of drivers firing forward and backward)
Everything that falls in between those extreme categories, gives mostly inconsistent results (uneven power response).
But we`re talking about large differences here, if a forward firing horn sound could be described as "dry" (my impression), then an omnipolar horn
gives me sort of a "wet" impression of sound (soundstage appears very "airy", sometimes too much).
Personaly, I`m leaning toward that "drier" presentation, which gives more immediate presence and the "airyness" could be enhanced with a wider disperssion tweeters (very short, wide angle horns or direct radiators).
http://www.duevel.com/Produkte/Ejupiter.htm
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Posted by horny on
11-23-2007
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http://www.duevel.com/test/E-DasWundervolle.htm
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Posted by horny on
11-24-2007
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horny wrote:
- or completely include room (a bogus idea, I know) by means of omnipolar radiation pattern
Romy wrote:
Why do you feel it is a bogus idea. This is the ONLY one sensible way to behave.
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Because I meant omnipolar radiation pattern across the whole frequency spectrum and you probably meant only in the bass and upper bass...
regards
horny
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