Im sorry to break this, but you will never get the potential of your IVas on the short wall! I have spent many years with my own IVa and helping others here at Audiogon, and its just not possible with your room, to make then work well.
I can save you countless hours by telling you to move on to a different speaker, or set up on the long wall and reconfigure your home theater. Home theater should not dictate your speaker placement if you want the potential from the speakers. The speakers must come first.
Sorry, Im not trying to be flippant here, I just know this as fact. If you care to take my advice I would follow the subsequent guideline. Your room is 12x21 due to the limited width; youll be forced to set the speakers 1/5th into the room, or in other words 2-5 from the wall to the center of the tweeter. The side wall should be at least 1/3rd greater than 2-5, in other words no closer than 3-3 from the center of the tweeter to the side wall. This would give you 14-6 between tweeters. (You could reduce this amount by up to 1-0) Now if your seating position is 1/3rd of the dimension into the room, your ear should be 4-0 from the back wall. This will put your ear approximately 9-6 from the tweeter. Next youll want to look at toe in: for my speakers in a similar room, I can just see the inside face of the speaker, in other words someone looking down the plane of the inside face of the speaker is looking just behind my ear. If you follow this guideline you will be extremely close to magic, from this spot adjustments should be made in increments of 1/8 a time. It will not take long before the image snaps into place and given the above formula all the frequencies should be time cohesive and present in full spectrum.
If you simply can not do the long wall, sell the speakers, they simply were not designed to be placed the way you have them.
J.D.
I can save you countless hours by telling you to move on to a different speaker, or set up on the long wall and reconfigure your home theater. Home theater should not dictate your speaker placement if you want the potential from the speakers. The speakers must come first.
Sorry, Im not trying to be flippant here, I just know this as fact. If you care to take my advice I would follow the subsequent guideline. Your room is 12x21 due to the limited width; youll be forced to set the speakers 1/5th into the room, or in other words 2-5 from the wall to the center of the tweeter. The side wall should be at least 1/3rd greater than 2-5, in other words no closer than 3-3 from the center of the tweeter to the side wall. This would give you 14-6 between tweeters. (You could reduce this amount by up to 1-0) Now if your seating position is 1/3rd of the dimension into the room, your ear should be 4-0 from the back wall. This will put your ear approximately 9-6 from the tweeter. Next youll want to look at toe in: for my speakers in a similar room, I can just see the inside face of the speaker, in other words someone looking down the plane of the inside face of the speaker is looking just behind my ear. If you follow this guideline you will be extremely close to magic, from this spot adjustments should be made in increments of 1/8 a time. It will not take long before the image snaps into place and given the above formula all the frequencies should be time cohesive and present in full spectrum.
If you simply can not do the long wall, sell the speakers, they simply were not designed to be placed the way you have them.
J.D.