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Where do I position 4 speakers for 3D stereo sound

My room is 22-15-8 feet. I have a pair of K-horns, and a pair of Lascalas. The K-horns are along the short wall facing outward using four foot false walls. The Lascalas are in the rear to provide a 3D effect. Both pairs are using separate Mark Levinson 334 amps. I am aware that these speakers are designed to be played loudly. However, when played at a low volume, they can create sound effortlessly, and without any distortion at all. My problem is how far back from the K-horns should the sweetspot be positioned,and where should the rear speakers be positioned
to provide the best 3D sound? If the sweetspot is ten feet from the K-horns, then all speakers will be equal distanced from the sweetspot. But is ten feet too close to the front speakers? If the sweetspot is moved back, will I be too close to the back speakers creating phase problems? In that case, should the rear speakers be reflected off the back wall, or side wall? With this in mind, the high frequencies from the tweeters will be lost? Does anybody have any ideas about this problem?
redwoodgarden

Showing 2 responses by redwoodgarden

redwoodgarden OP
150 posts
 
Thanks your help. You have given me some good ideas. I too am a two channel purist, which is why I don't want any processors involved to achieve the effect that I want. I realize that good recordings provide a spacial effect with two speakers. However, I have found that the effect is all up front. I would like to feel that I'm involved with the music experience, not just witnessing it. Only back speakers can provide that. How to go about using back speakers is the problem. Processing two channel music through all 4 speakers is out of the question. Distortion of the original music will always be a problem, regardless of the quality of the processor. However, I never considered using a processor for only the rear speakers. I can now feel the gears grinding in my head.

Let me now bring up another series of questions. Which processor would be best for creating spacial ambiance through only the rear speakers using today's technology? Where should the rear speakers be positioned while using the processor? Is rear speaker distance to the sweetspot important?
redwoodgarden OP
150 posts
 
Thanks for your suggestion, Pbb. I think you may have hit the mother load. I've spent hours today looking at the Dynavector website and was very pleased with their presentation. Hopefully I'll be able to use the Lascalas for the rear speakers. I'll check that out tomorrow.
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