The CRICKET Polarity/Continuity tester is great for sound contractors, musicians, DJs, and many others. Polarity, should it become reversed, can play havoc with a sound system. If two sources are emitting the same electrical or acoustic tone (frequency), and one of those sources is in a state of inverted polarity, those tones, when combined at a given point, will cancel each other. This severely alters the sound of a system.
Polarity can be reversed while soldering cables, adding components to...