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In Reply to: RE: A Challenger? posted by Mag on May 22, 2007 at 17:52:22
My room has the following dimensions:
Front wall - behind speakers: 5.2 metres
Left wall: 7 metres
Rear wall: 3 metres
Right rear wall section: 3 metres
Wall to right front section: 2.2 metres
Right front wall section: 4 metres
In other words its a 5.2 metre x 4 metre rectangular space with a 3m x 3m area added at the rear of the left side.
Basically for speaker placement I ignored the 3 m x 3m section and worked with the large space. Speakers are 2 m from the front wall (measured at the speaker front face), ie half way between the front and the back of the 4 metre deep main space. They are 1.3 metres (measured middle of the front face) from the side walls. The listening position is up against where the back wall would be if the additional space wasn't added on behind me, and the bend in the room is just behind and to the right of my right shoulder. It's basically the classic Audio Physic setup which places speakers well away from the walls and has much longer first reflection paths than the direct path from speaker to listener. That is the critical factor for reducing the impact of the room on what you hear: you need to ensure that the direct signal is considerably higher in level, preferably 10 dB or so, than the level of the early reflections.
Basically you're relying on a near field listening setup or as close to that as you can get. Because of the proximity to the speakers, 2 way monitors work better than 3 ways because the sound of the different drivers intergrates quicker so you want a 2 way with good bass extension. My Dynaudio Contour 1.3 SEs fit the bill. The only problem with using monitors with good bass extension is that they tend to be inefficient so you need a solid amp to drive them.
The big factor in all of this is your room. My room is L-shaped but the dimensions are such that it allows me to do what I have done. No doubt there are other L-shaped rooms with dimensions that wouldn't allow my setup but then there aren't any setup approaches that will work for every room.
Basically, my advice for good results in an L-shaped room is to find a way of setting things up in a near field approach if at all possible. If that isn't possible, or even if it is, use sound absorbing panels on the side and front walls to treat the early reflection points. You'll get the best results you can in the room by going that way and the results may well be better than what many people get in what would be regarded as a better room.
The difference between using only 2 channels for stereo and "multi-channel stereo" is that you only have one sound source for each channel in plain 2 channel stereo. That will always give you better imaging and soundstaging than using more than 1 sound source for each channel.
David Aiken
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