Awesome tool - Did EXACTLY what I needed

I needed to test polarity in my car stereo system as I cannot find wiring diagram for it ANYWHERE! I knew polarity for speakers but not for the wires coming from the head units amp. I looked all over the internet for ways to test it, only found expensive testers and ways to test the polarity of the speaker itself. I was able to use this app plugged into my stereo aux input and test each speaker one at a time to confirm that I had correctly deduced the correct wiring. Can’t say how excited I am to have found this easy to use app. Most of the testers I found cost over $100. This app was totally worth it’s price.

Chad Kuske about Speaker Polarity, v2.5