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In Reply to: RE: Sean Olive posted by KlausR. on January 31, 2008 at 08:08:27
"CD (constant directivity) is a well known design criteria for large venue systems, but it is almost nonexistent in home high-fidelity loudspeaker systems. There are two reasons for this; pistons and size. Piston sources can never be CD and CD simply cannot be done in a small area. It takes space and area to control sound radiation and there is simply no way around this fact. Hence, for sound systems in small rooms, bigger really is better. Somehow it just seems obvious that the larger speakers of the past sounded better than the multitude of mini-cubes and tower speakers of today. Small speakers do have their place, but not as sources for critical listening in a well designed room. Virturally all small speakers are omni-directional. It's easy and inexpensive, but completely wrong for a small room."
Your monitors would fall into this category I believe. So actually in a small room a large full range ribbon or electrostat (like a Soundlab) gives a more ideal radiation pattern (and CD over a very wide range) in a small room. Of course Geddes also says his horns are CD. He points out that omni-directional speakers (like nearly all smallish box speakers) have big problems in small rooms with early reflections and that damping them is not the solution. If you want to read his thoughts on this you can find the white paper on his website with the Summa loudspeaker. There is much more to speaker design, Klaus than on-axis FR.
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