Most surround sound processors and receivers automatically detect reversed speaker wiring, which results in an out-of-phase test tone from the miswired speaker. The calibration microphone detects the initial sound wave deflection as negative when it should be positive, and the processor then tells you to correct the wiring.
This "feature" can occasionally be a problem with some multi-way speakers in which the polarity of one driver has been deliberately reversed by the speaker designer. In this case, the processor/receiver may show a polarity error when the wiring and phase are actually correct.
This "feature" can occasionally be a problem with some multi-way speakers in which the polarity of one driver has been deliberately reversed by the speaker designer. In this case, the processor/receiver may show a polarity error when the wiring and phase are actually correct.