I am just starting the design phase of my outdoor theater. I am considering using outdoor speakers without any form of surround or stereo -- kind of like having an old school drive-in speaker, but hopefully crisper. My concern is neighbors. I will put this on a fairly small lot (1/5 acre to 1/3 acre?) and I think that putting speakers around the screen/yard will require volume levels that will annoy the neighbors.
My solution would be to use a number of speakers spread throughout the viewing area -- all delivering a mono sound signal. This would allow me to have speakers close to the listeners that deliver relatively low volume sounds.
If surround sound isn't a priority for you, what do you think of this approach? Do you have a better suggestion?
Also, how would you wire it? I assume I would send the sound signal through an amplifier first to get enough power, but coming out of the amplifier I would only need a mono signal. However, I would want to feed this mono signal to multiple (three? five?) speakers.