Reversed speaker phase kills your sound: weak bass, floating soundstage, lost stereo imaging—even golden ears struggle to spot it. Speaker Phase Polarity Check is the essential tool for audio installation & tuning. No expensive gear needed—use your phone’s mic to quickly verify speaker polarity & phase alignment for car, home, stage, line array & studio monitors. Key Features • Audio Capture: Record test tones via your phone microphone • Local Analysis: Offline processing, clear in-phase/reversed result • Adjustable Parameters: Adapt to different drivers, enclosures & setups • All Scenes: Car audio, home theater, stage PA, studio monitors Privacy & Permissions Only Microphone access required for audio sampling. All data processed locally—no uploads to servers. Your privacy is protected. Who It’s For Car audio installers, sound engineers, live sound technicians, audiophiles & shop pros. Eliminate wiring mistakes & cut troubleshooting time.