Car Auto Audio Horn Speaker System Polarity Tester FH-168 Phase Meter Phasemeter
12,67 €
3 red light flash and 1 green light indicates that the speaker output is in negative phase (reversed connection). Play section 3 or 4, the sound speaker will produce a fixed frequency signal. Play section 1 or 2, can check the left/right channel connection is right or not.
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