Put up the O2's outdoors today, in the neighbors back yard. Her daughter is having their engagement party tomorrow and they wanted sound outside without having to resort to a boom box. The speakers are mounted horizontally on the fence, on the top rail, about 5' off the ground, 15' apart, behind an open leaved fig and several other bushes. Its all tied together with a small (Parasound) ZAmp, Airport Express and my home network. IT'S FLAWLESS and SOUNDS BEAUTIFUL... Sound everywhere, great clarity, surprising bass, no distortion (considering the ambient noise level) and everyone's iPhone will be accessing it tomorrow.