Sonos Ultra - 2' in front of 120" projection screen 1 x Sub 4 - on floor beside the arc 2 x Era 300s - 12' back from front wall, 1' off side walls, slightly behind seating area Room: 12 x 25 section of open plan 40 x 25 finished basement Reason for going Sonos: Simplicity of 4 units to get 9.1.4 system. More @Wikipedia
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