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In Reply to: Bass trap and L-shapped room posted by alexl on December 23, 2004 at 15:39:37:
Tube traps can be very effective in the ceiling corners, and that's usually one place that's out of the way. I have one right in the center of the long wall behind my listening position at the wall/ceiling junction and it made a very nice difference. I'm sure if I could have put it in one of the corners it would have made a huge difference. Don't forget that you can also use tube traps on the ceiling between the listening position and speakers to arsorb one of the first reflection points (depending on your type of ceiling, of course).From a different approach, can you move the speakers at all from where they are? If so, you might be able to make the bass hump smaller in magnitude and/or slide it up in frequency so that it's easier to treat.
My last listening room was 12'x12', so I know your pain all too well.
Best of luck, and Happy Holidays!
Follow Ups:
I did some speaker positioning a year ago. I know it could be better than the actual position but then it wouldn't be possible to fit the furniture...So you said that a bass trap between the listening spot and the speakers at the ceilling would help. I'm quite surprised, I tought that the best place to put them would be in corners where standing waves concentrates.
I guess I could try Jon Risch's quick and dirty bass trap and hang 4 or 6 of these around the room to see how it helps.
If I don't like it I could just return them to the hardware store.
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All bass traps will be most effective in a "3-corner" but they work in less than perfect positions as well, only less so.IME bass traps (RPG membrane absorbers... very good and still small) makes the best job in the corners most distant to the speakers.
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