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I have a rather largeish reverse "L" shaped room (Basic rectanglar room measuring 16 ft x 22ft with 9 foot opening at the begining of the "leg" at the rear left)that is set up for Home theater (In wall 7.1 setup), and a high End Stereo system. The room has lots of edges and a nice thick carpet. I don't hear much echo if at all, but I don't get the very 3 dimensional sound I'd hoped with my CARY,Reference 3A, Well tempered setup. The Home theater is midfi and of lesser concern than musical listening. I do have a 46: projection TV projecting abot 3 feet out into the room from the centerline of the 16 ft wide wall. Could this be the issue?
Thanks for your help...
Follow Ups:
I'm not to clear on your layout from your description but I have a single purpose L-shaped room a little smaller than yours, and probably a very different setup.Ethan Winer's comment about balancing openings with absorption on the other side is spot on. I've had openings to one side of my speakers in my last 2 rooms now and had a lack of success with everything I've tried to do about the opening. Using absorption opposite the opening can balance the L/R sides of the soundstage quite a lot and centre your centre image as well. It's the only thing I've found that works given my integrated lacks a balance control so I have to do things the hard way.
Symmetry definitely helps get a good 3 dimensional sound but symmetry is just what you don't have in an L-shaped room. So, other suggestions besides absorption opposite the opening:
- the 'toe' of the L is a problem and the choices are probably to make that area as dead as possible or ensure that the sound exiting from that area is as diffuse as possible. I use 2 DIY room lens type diffusors in the corners of the toe of my L, but bass traps would probably be more effective. Unfortunately bass traps wouldn't fit in my room because of windows.
- a 'dead end' at the speaker end of the room can help a lot, as can a nearfield listening setup or even a combination of the two which is what my room relies on. Both of these approaches minimise the room contribution to what you hear. A lot of the 3 dimensionality you're looking for comes from phase information and room asymmetry unbalances that significantly. The dead end behind the speakers and nearfield listening will ensure that the direct sound predominates and help considerably.
- experiment with toe-in. Listening on-axis with the speakers pointed directly at the listening position may help a bit.
- you can try throwing a quilt or thick rug over the projection TV whilst listening to music.
You may not be able to do all of those things but do what you can and you should be able to improve things a fair bit.
David Aiken
http://www.audiocircle.com/circles/viewtopic.php?t=24798
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