sunnyjim,
I have the 1.7s and couldn't agree more with elevick. It is so important to get these guys back away from the front wall. I am in a room 13 x 20 with cathedral ceilings and an alcove off the back about 8 x 10. I am using the room length wise, with the speakers about 8 ft. off the wall. With the dipole speakers firing front and rear you have a lot of reflection to deal with coming back at you from the front wall. You have the original sound wave coming directly from the speaker and then the secondary signal bouncing back at you from the wall a split second later. What you are dealing with is what is called the Haas effect, which I understand reinforces positively some of the sound waves and hurts some others. My understanding is that once you get these speakers back off the wall far enough, most of the negative effects go away. I find that the sound I get has an expansive sound stage is is so wide open. The music appears to originate off the front wall. If you stand between the speakers while they are playing you can really experience the sound coming back at you from the wall. Here is a link to info on the Haas effect
https://en.wikipedia.org/wiki/Precedence_effect
The phenomenon of the two different time arrivals also results in what the experts refer to as comb filtering. Here is a nice discussion from PS Audio
https://en.wikipedia.org/wiki/Precedence_effect
I am certainly not an expert regarding acoustics and hope I didn't give any wrong of confusing information. I think it is fascinating, especially when you can experience in your own room. Good luck.
I have the 1.7s and couldn't agree more with elevick. It is so important to get these guys back away from the front wall. I am in a room 13 x 20 with cathedral ceilings and an alcove off the back about 8 x 10. I am using the room length wise, with the speakers about 8 ft. off the wall. With the dipole speakers firing front and rear you have a lot of reflection to deal with coming back at you from the front wall. You have the original sound wave coming directly from the speaker and then the secondary signal bouncing back at you from the wall a split second later. What you are dealing with is what is called the Haas effect, which I understand reinforces positively some of the sound waves and hurts some others. My understanding is that once you get these speakers back off the wall far enough, most of the negative effects go away. I find that the sound I get has an expansive sound stage is is so wide open. The music appears to originate off the front wall. If you stand between the speakers while they are playing you can really experience the sound coming back at you from the wall. Here is a link to info on the Haas effect
https://en.wikipedia.org/wiki/Precedence_effect
The phenomenon of the two different time arrivals also results in what the experts refer to as comb filtering. Here is a nice discussion from PS Audio
https://en.wikipedia.org/wiki/Precedence_effect
I am certainly not an expert regarding acoustics and hope I didn't give any wrong of confusing information. I think it is fascinating, especially when you can experience in your own room. Good luck.