Centre to Centre i have 15ft, and your right in sterero, i have had the same experience, sound comes from the centre. I just measured my Jubilee Bins, they are Just under 40 inches high. Wonder if i should increase my height limit to 3 ft 4 inches. i was trying to keep my screen viewing area as large as possible, but i be talked into sacrificing the extra viewing space for a Jubilee bin maybe... It might not be conventional, but if i did use the jubilee bin, i'd use my 510MF/703HF seciton, which i've already used in the past, it works well actually. i have a passive xover for it, with an autoformer to match the top half with the jubilee bin. The more i think about that, the better that idea gets. i think my screen viewing area was limiting my options.