Most rooms need only 20–50 watts per channel, far less than most people buy. The quick rule: small room = 20–50W, medium = 50–100W, large = 100–200W per channel with average-se...
You need exact numbers to place Dolby Atmos speakers well. In a 5.1.2 setup, mount two overheads at 45° elevation, or 65° from horizontal. A 7.1.4 layout uses four tops at 45° in front of ...