Review on 🔊 Enhance Audio Quality with AUTUT Automotive Speaker Polarity Tester Phasemeter Tool by Curtis Castillo

The phase tester works perfectly! Very easy to use. Insert a CD and set it to track 3 or 4 (both are the same), turn up the volume a bit so you can hear the popping clearly. Hold the phase meter near the speaker and hold the button. If the phase is correct you will get three green lights and one red. If the phase is reversed you will get three red lights and one green. I could easily tell that the two speakers are out of phase! Worked great every time! Great price, fast delivery!