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In Reply to: RE: This is the placement manual for the E which should be the same as the J...but my J manual... posted by RGA on May 16, 2009 at 20:00:09
NT
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I'm trying to see a picture of this in my mind. You have a 12.6 short wall, a 24 foot long wall and 12 foot high ceilings. By the sounds of it you're room is a lot better than mine in size for this speaker so there is definitely a way to get around this problem.
Though I'm not sure about having them on the long wall since I've never tried them that far apart. The High Ceilings.
Is there a way to get them on the short wall? Still at the VSAC show in 2008 the AN E was placed very far apart in corners and many felt it was the best sound of the show so being far apart should not be a problem. I'd still put them as close to the corners such that you can't even put your finger between the cabinet and the wall with toe in firing 6 feet in front of your head. This will be severe - then gradually turn them to face you but still in front of your head.
If this is the case, then I'm not surprised you're experiencing the problems you have. Unless each speaker is in the same position relative to the room boundaries you are going to experience an unequal frequency response from each of the speakers. This will mess up the imaging as each speaker will have peaks and dips in the frequency response that is different from the other due to unequal positioning. Its also quite possible that one speaker is positioned in an area that is creating the boom you are experiencing. I experienced something similar to this when I had my AN/J's in a large room along the long wall where one speaker was very close to the center of the long dimension and the other was about four feet from the corner. Moving them to a relative symmetrical position was much better.
If you have a Radio Shack SPL meter measure each speaker separately from your listening position with 20-20K Hz 1/3 octave test tones to see how they differ in their current position. Don't be too concerned about the meter's ultimate accuracy as you are measuring each speaker relative to the other. My guess is that you will see a definite difference in their response and one may be the boomy culprit. If that is the case, repositioning the speakers for the smoothest and more equal frequency response relative to each other will give you much better results if that is feasible in your room. Good luck.
Don't be too concerned in attaining a relatively flat response when measuring both speakers together after you've done the separate measurements and tried to optimize the speaker positions relative to each other. Due to the speakers' response and room interactions that is nearly impossible in real life. Final positioning should be done by listening, not measurements, as it is you who will determine what sounds best. When listening if you're thinking about the music and forget the sound, you're done.
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