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Cricket Polarity Tester

There's a device that's marketed for setting up PA systems to get the polarity right. It generates an asymmetric test signal out a speaker and has a built in microphone, so it provides an end to end test. It also has electrical inputs and outputs.

Of course the situation with a PA system is more critical, because if the polarity is wrong there will be cancellation of the live and amplified sound. This would be true even if the source sound had a symmetric waveform.


Tony Lauck

"Diversity is the law of nature; no two entities in this universe are uniform." - P.R. Sarkar


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