Apps like Polarity Checker

Here are some great alternatives to Polarity Checker by DWA ICT Solutions :
Car Audio Setup
Car Audio Setup
★3.3
Audio Analyzer
Audio Analyzer
★4.4
Volume booster Sound amplifier
Volume booster Sound amplifier
★4.3
Hifi-Apps Speaker Setup 2
Hifi-Apps Speaker Setup 2
★4.4
Sound Booster・Increase Volume
Sound Booster・Increase Volume
★4.6
Volume Booster - Sound Booster
Volume Booster - Sound Booster
★4.5
Speaker Check: Sound Problems
Speaker Check: Sound Problems
★3.5
Equalizer & Volume Boost
Equalizer & Volume Boost
★4.5
Equalizer & Volume Boost PRO
Equalizer & Volume Boost PRO
★4.5
Hifi-Apps Subwoofer Optimizer
Hifi-Apps Subwoofer Optimizer
★4.1
Super Max Volume Booster : Lo
Super Max Volume Booster : Lo
★4.0
Speaker Tester & Cleaner fix
Speaker Tester & Cleaner fix
★3.5
Earphones Test+
Earphones Test+
★4.2
Volume Booster - Sound Booster
Volume Booster - Sound Booster
★5.0
Volume Booster Speaker Booster
Volume Booster Speaker Booster
★4.7
Speaker Booster Pro
Speaker Booster Pro
★4.4