BEST APP--EVER!!!

THE BEST FIVE DOLLARS I EVER SPENT IN MY LIFE!!!!

This is the best app I have ever used. Period. Something didnt sound right in my car stereo after upgrading the speakers, which required cutting the factory harnesses. It turns out the Crutchfield and other available schematics had the colors of + and - opposite to my cars factory wiring. It could be due to my car being a very limited run car (the only one I know of and that the dealers knew of). After spending a lot of money on a sound system, I didnt want to be in another $200 to buy a phase tester. THIS IS IT !! BEST 5 DOLLARS I EVER SPENT IN MY LIFE!!! If you have an iPhone and need a phase test tool this is it.

DubiousMosquito about Speaker Polarity, v2.5