Online Stereo Polarity Test

Key Features

• Left/Right Identification: Instantly verify correct channel wiring for headphones and speakers.
• Polarity (Phase) Check: Detect "Out of Phase" wiring that causes bass cancellation.
• Pink Noise Generator: Professional static noise for accurate volume level balancing.
• Stereo Sweep: Automated panning to detect dead spots in your soundstage.
• Client-Side Audio: All sounds are generated in your browser for 100% privacy.
• No App Needed: Works instantly on any device without installation.

How do I use it?

It's simple: Step 1: Connect your audio device. Step 2: Click "Left Only" to verify channel orientation. Step 3: Use the "Phase Check" to ensure your bass sounds solid, not hollow.

Why Check Phase?

If one speaker is wired backward (+ to -), sound waves cancel each other out, killing your bass. Our In/Out Phase tool helps you hear and fix this common error instantly.

Is this tool free?

Yes, this tool is 100% Free. There are no limits on usage. It is designed for audiophiles, gamers, and home theater enthusiasts.

Perfect for Gamers

Competitive gaming requires accurate directional audio. Use this tool to verify your headset is oriented correctly so you can hear enemies from the right direction.

Privacy & Security

Your privacy is our priority. Since this tool runs Client-Side (in your browser) using the Web Audio API, we never record microphone input or upload data.