Question on Speaker Placement

My experience for monopoles is the distance to the back wall in conjunction with listening distance most affects approximately the 40-400Hz range. I use inexpensive acoustic measurement setup to more efficiently figure out placement, especially with the two variables. 

I start with the Jim Smith .83 ratio for speaker width to listening distance and experiment with that by ear before adjusting toe in. I totally agree with marking each placement as you go. Speaker placement is cheap but can take hours and hours of work, especially in the beginning. People learn as they experiment. 

@mysterioso1 

If you measured the frequency response of each speaker independently at your listening position they would show huge differences, mainly in the bass to midrange regions.  It may sound ok, but each speaker is broadcasting a very different tonal balance.  Listen to one at a time to hear the difference.

The good news is that a wider spread can sound great, in fact that is what I prefer.  Based on the recommendation of a local dealer who sells speakers that like to be near the corners I tried a wide spread and now cannot live without it, kind of like an IMAX sound stage.

My ratio is 1.18 to one, meaning if your speakers are 13 feet apart, make sure your ears are about 11 feet from left ear to left speaker, right to right etc.  

To make sure you don't have any holes in the center stage image, play a mono recording and adjust the toe angle of each speaker so that the center image vocals sound full and even with a well defined image.  

Enjoy! 

Echo others I’d think you’d hear a volume imbalance given the reinforcement from the wall in the one speaker, but apparently it’s not affecting you.  You might consider trying some sound absorption behind that speaker just to see if you get an improvement.  To me, 13’ between speakers is really wide.  Best of luck. 

Thanks for all the feedback and great suggestions. As of now, I've widened the distance between the speakers to 10' with a slight toe in. Both are now backed by a wall. Still assessing the sound change, but so far, I think it's positive. Again, thanks.