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In Reply to: RE: Because Stax was stacked into a line source posted by kentaja on April 26, 2017 at 09:20:45
I didn't mean to imply that they can't but that most constructs don't.
Follow Ups:
Agreed. I don't think most stacking arrangements I have seen do a good job with the speakers.
do you mean aim for the listening position to face a convex curve of 57s, with the lower pair aiming at the listening position?
Like this?
Big J
"... only a very few individuals understand as yet that personal salvation is a contradiction in terms."
No. The panels should be maintained in a vertical position, one on top of the other and raised off the floor so the lower pair is optimized for the listening position. This is how Quad proposed stacking the speakers. Trying to maintain the frame curve will not work nor will trying to tilt, etc. so that both speakers are aimed at the listening position.
Stacking the original Quad to extend the line source does not work. Given the height of the thing one will always be stuck with the 15 degree of vertical dispersion. What you have when you stack is two short line sources that beam 15 degrees in the vertical plane. There is no way around this. If you slowly stand in front of the stack you hear the vertical beaming and the suck out of high frequency in the middle of the stack.
The pic of the stack is a unique system put together by Ijaz Khan. I have spent many nights drinking Scotch with Ijaz listening to this system. The stack is not the main part of the system. If you look behind the stack you will see a single pair of Quads in a custom frame on a stand that raises the speakers about 18" off the floor. The single pair is vertical, no tilt backwards, and is aimed at the listener.
The stack is placed at an angle facing the side walls on the outside of the single pair. Ijaz is emulating the approach Robert Alister-Aikman used with his ESL-63. There are three pair of Quads used in this system. I have tried this approach myself but my room is far too live for it to work. Ijaz's room is heavily damped and the result is stunning he has spent years refining this approach.
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