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My system consists of a parasound avc 1800/b&k av 5000 and monitor audio speakers. I also have acoustic treatment and roomlens and have played a little bit with both. My room is 12x18. My monitor audio's are about 8ft apart, 3feet from the front wall, 2 feet from the side walls and i am seated approx. 9feet from the front baffles. I have used ETF 5 for flat frequency response but the problem is not accuracy but imaging/the"sweetspot". There is the layout. My problem is not when i am necessarily seated directly into the sweetspot(center position), music and movies are enticing and my MA's are musical but when i put 2 recliners together or i have a 2-3 seater couch if the listener is as little as a couple feet off axis then the closer speaker begins to dominate the other. I don't know if the listeners to the sides can enjoy the same sound quality as the listener in the center seating position but i would certainly invite suggestions as to how i can WIDEN the "sweetspot" and how to improve the sound for the other seating positions. I also need to place my sub properly, it lacks bass impact.
Follow Ups:
I can't help you with your sweet spot problem (I have a very similar problem right now) but I can give you a couple of tips that helped me with my sub. You may already know all of this but here it goes.First, try placing the sub where you would normally sit, put on a source that has good, accurate varied bass and try walking around the room until you find the spot that sounds best. Not boomy or boxy, but tight and accurate. When I did this I unhooked my other speakers and only listened to the sub. The corners are a good place to start as they tend to reinforce bass. When you find a good spot mark it and keep walking around the room. Pretty soon you should have two maybe three spots that sound good but one will start to sound better. That's where you put the sub.
Once you get the sub where you think you will want it, hook up your main speakers, throw on some music and have someone switch the phase around. One position will have noticeably more bass then the other.
Try using a SPL meter and a set up disc that will roll through your speakers to balance out the sound pressure from each speaker, including your sub. But this is only a place to start as you will still need to play music and movies to get the final sound right.
After the above play a lot of music and tweak until it sounds right to you. I set my crossover at 70 hertzs, about 20 hertz above where my mains start to roll off (my mains are flat to about 47 hertz. I also run my mains as small, but that is very system dependant and you should try both small and large.
Hope that helps,
Jeff
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