Accurian 6.1ch Sirius-Ready A/V Surround Receiver User Manual page 14

Height of the Speaker Units
Front Left and Right Speakers, and a Center Speaker
Align the tweeters and mid-range drivers on the three front speakers at the
same height, as best as possible.
Surround Left and Right Speakers, and Surround Back Speaker
Place the surround left, right and surround back speakers higher than your
ears by about 2.4-3.5' (70 cm – 1 m). Also place the speakers at the same
height, as best as possible.
Note: Use magnetically-shielded speakers for the front left, right and
center speakers when the speakers are installed near the TV and the TV is
a monitor type.
2.4-3.5'
(0.7-1 m)
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