Sony STR-DA5500ES Operating Instructions Manual page 56

Display Explanation
Warning 44 Measurement has been completed. However the speakers are not placed in the proper position
with respect to each other. See "1: Installing speakers" (page 21) and check the relative
positions of the speakers.
NO WARNING There is no warning information.
---------- No speakers are connected.
Tip
Depending on the position of the subwoofer, the
measurement results for polarity may vary.
However, there will be no problems even if you
continue to use the receiver with that value.
56
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