Testing speaker polarity | if cables aren't marked (quick video)

Testing speaker polarity, i have custom in-wall speakers and the cable was painted over (due to renovations) and I couldn't tell which was postive or negative on the cable. I wanted to make sure the speakers were been correctly connected to the amp. So positive and negative were correct. Don't stress to much if it's not correct: it will still work. Kinda means the speaker will be pulling instead of pushing. Sound is kinda about moving air/creating sound waves. Might mean a loss of volume or maybe loss of quality of sound. Just connect the speaker cable correctly at both ends, match up the: speaker cable to the speakers terminals and the amps terminals. This also worked with a AA Battery.