Genesis 1.1, Infinity IRS V, 4 chasiss speakers

I have heard these IRS V monsters with the bass towers placed about 2 feet behind and 2 feet further apart than the emit emim panels which were placed only about 6-7 feet apart. The woofer boxes were near the corners of the back wall. All I can tell you that we were in a relatively near field listening position given the size of these incredible speakers, maybe as mejames said 10 feet from the forward most panels, in a room with a highly slanted cieling with the lower end holding the speakers. I would add that they were fabulous sounding and perhaps the most impressive speaker system I have ever heard arranged in this manner but I like big sound. I did not hear them however in any other position so I have nothing to compare that position to. The person who owns them however is a professional speaker refurbisher of high repute and very knowledgeable with decades of experience.
He actually owns 2 sets of these and a set of IRS betas- unbelievable. The second set is in a larger room and were weren't placed much further apart maybe 8 feet I did not get to hear them.
I am unfamiliar with the Genesis speakers.
I don't disagree with mejames'formula approach but I always position my own speakers by trial and error until I reach a satisfying result. With these enormous speakers that may well put you in the hospital for a hernia operation.

My room is 22 ft x 70 ft with a 20 ft high ceiling....the listening area is 22 ft x 40 ft. I was wondering about the feasibility of putting them against the long wall. Six feet out from the wall would give me another 16 feet back of listening area.

Although I have never heard either of these speakers, I did have some concerns about the separate bass towers blending seamlessly with the ribbons....you have the proprietary servo-amps driving the bass towers and your own amp driving the ribbon towers....it seems a natural that this could pose some problems.

believe long wall situation you refer to would definitely work you would also benefit because your first reflection point would be drastically delayed because the speakers are nowhere near the sidewalls

My RS 1-B's are in an unusual space (see my system pics). However, I have them spaced approx 5 feet apart (tweeter to tweeter) and my listening seat is 8 feet back. My room is 27 x 16 (living/dining room). The woofer columns are behind the mid-tweeter panels. Not the best place for them but it works for me. When Harry Pearson had the IRS's that's how he had them (the woofers) set up. Sounded pretty good!

Thanks for the info and pics on you system Rwd.....You are using tubes on top and SS on the bottom in a 4 chassis setup......any problem with the woofers and mid/tweet columns getting in sync using two different types of amps?