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Owner's Manual

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Chapter 8: The Display: Polarity Checker
Polarity Checker
The Polarity Checker display allows you to measure the polarity of the speakers in your system using a microphone. This will allow you to locate
any speakers that are wired out of phase. Not that it was you that wired them that way, of course. This is a no-guilt operation designed to help
you x the problem quickly before anyone notices.
Connect a microphone to the XLR input of the DM-RTA, and connect one of the audio outputs of the DM-RTA to play in the loudspeakers of your
system. During the test, the DM-RTA will play a test signal into your system, and the microphone signal is then analysed.