From the middle MLP seat, the side surrounds are 5.5’ and 3’ to the seat son each side. The rear surrounds are about 3.5’ from the MLP.
I used to have horrible hot-spotting issues on my side surrounds with the direct radiating KEFs that I have and took me a fair amount of messing with them to get it worked out. The rear surrounds, not really hot-spotting, just getting them in the right position to be most effective needed some work with quite a bit of experimenting too.
For the side surrounds, since my room is so small and having the direct radiating bookshelf speakers, there were two main things that I had to do to fix the problem. Well, for starters, I have to have them forward/in front of me a bit, so they clear the heads and don’t get blocked if other people are in the seats. So not 90 degrees, which helps a little as well I think. But the two main things are levels in the mix and direction. The tweets are pointing forward at about a 45-degree angle, which is quite a bit, but this helps tremendously for non-localization while still giving a great sound. Then I also run them 7db lower than what Audyseey sets them at. I would think this would be WAY to low in the mix, but somehow sounds just perfect to my ears. Hotspotting and localization for the side surrounds is totally solved in this small room. At least in the MLP and is still pretty darn good in the side seats too. I had to watch a movie in the side seat the other day because my daughter wanted the middle MLP seat when we were watching Aladdin (I was a good dad and gave up the MLP
LOL). To my surprise, I don’t think I localized a speaker once during the whole movie (which had a fantastically mixed soundtrack IMO), which made me very happy. Was still real enveloping too, which I thought was way cool. Not as great as the MLP being dead center of course, which you just can’t beat for imaging, but still really good.
So, for the rear surrounds, it mainly just took me some time to get them were they needed to be to give the best enveloping and realistic effect. These are about 3.5' from my ears with each pointed directly at me. They are not directly behind me, but not too far off to the sides either. Kind of a happy medium, but probably more behind me than far apart. It seems to be just enough and in the right position, that they still image really good, which is awesome and what I was wanting for the MLP. I’ve been amazed at the rear surround field lately with movies, which seems to make such a huge difference!
The side surrounds and the rear surrounds (all the speakers actually after quite a bit of work with toe in and whatnot) seem to all work together pretty darn seamlessly now without drawing attention to themselves at all. Pans seem big, smooth and really immersive, while not ever noticing it actually coming from the speakers themselves, at least to my ears and what I tried so hard to achieve. It could possibly be better yet, but I’ve been super happy with it after those changes, which took me a while to find what I was wanting. The rear surrounds may be just a touch high but wanted them to clear the seat backs since my ears are just a bit below the top. I could probably drop them a couple more inches and be fine, increasing base level to top rear distance just a bit for more spread. May not matter at all though.
I attached a few pics as well to try to show what I was talking about with the speakers in relation to the seats. Hope that helps! Maybe more info than you wanted, but there it is LOL
Front side angle to show rear surrounds and side surrounds ...
From the side to show positioning and angle. Oh yeah, I think the diffusers help too that are directly to my sides.
View from the back closet that houses the PJ and amps ...
Do you have a small room too and some hot-spotting troubles going on with your speakers? Aggressive toe in helped TREMENDOUSLY as well with my front’s speakers and top speakers for the outside seats. I couldn't believe what it did for the outside seats actually.