This might be an easy answer or not.. (??)
Right now, I've got a single stack that I've used outside. I'll try to attach a picture. The screen is used as a rear projecton so that all the electronics are not only closer to the house but, out of the way.
Speaker is off to the side so as to not interefere with the rear image.
My goal would be to acquire FOUR more stacks like this as I think it would be fun to do an outdoor surround system with incredible dynamics. Fortunately, the house is situated in the woods where I don't have to worry about neighbors and can have all the fun I want.
So, this brings me to...
If the center speaker MUST be off to the side and if I get another (let's keep it simple and say TWO) stacks for a front left and a front right, how far to the side might those be able to go before the sound being "50 feet wide" verses the screen being 16 feet wide starts to play mind games with your eyes and ears?
To throw it to the extreme, if the speakers are 100' apart to the front left/right it's not going to match up. If the front left/right are butted next to the center speaker (forgetting for a moment that it is to the side of the screen) then the sound is going to be a bit narrow and small.
Seating position is about 50' back but, others sit in the grass closer in.
Image of screen/speaker
Seating position for deluxe ticket holders