Headphone Stereo & Acoustic Polarity Tester
Audio DiagnosticsTest left/right channel orientation, acoustic in-phase vs out-of-phase wiring, sub-bass extension, and driver rattling.
Headphone Stereo & Acoustic Polarity Tester
Test left/right channel orientation, acoustic in-phase vs out-of-phase wiring, sub-bass extension, and driver rattling.
Confirm stereo orientation, driver phase integrity, and low-frequency bass response.
Channel Orientation & Separation
Acoustic Polarity (Phase Correlation)
Identifies reverse speaker cable wiring (+/- swapped) and driver phase cancellation.
Frequency Driver Sweeps
Inspect low-end extension, transducer rattling, and high-frequency hearing limits.
What is Headphone Stereo & Acoustic Polarity Tester?
Test your headphones, studio monitors, or earbuds for stereo channel separation, left/right orientation, acoustic polarity (in-phase vs out-of-phase), and low-frequency sub-bass driver extension. Engineered 100% in-browser with precision Web Audio spatial routing.
How to use Headphone Stereo & Acoustic Polarity Tester
3 simple steps to complete your task directly in your browser:
Wear Headphones Correctly
Put on your headphones or position yourself centered between your left and right stereo studio monitors.
Test Left & Right Channels
Play isolated left and right audio cues to ensure your stereo cable or Bluetooth earbuds are not inverted backwards.
Check Acoustic Polarity (Phase)
Listen to the In-Phase test (sound focuses centered between your ears) and Out-of-Phase test (sound sounds hollow and dispersed).
Common uses
- Gamers: Confirm directional spatial audio orientation before competitive FPS matches (Apex, CS2, Valorant).
- Audiophiles & Hi-Fi Owners: Detect accidental reverse-phase speaker wire polarity connections (+/- inverted).
- Music Producers & Mix Engineers: Verify stereo width, phase correlation, and mono compatibility of monitor setups.
- Hardware Buyers: Inspect used headphones for blown transducers, channel imbalance, or low-end distortion.
Why choose VersaTools
100% private
Your files are processed inside your browser and are never uploaded to a server.
Free, no account
No sign-up, no watermark, no paywalled “premium” tier. Just open a tool and use it.
Instant
No upload, no queue, no server round-trip — work starts the moment you drop a file.
Runs in your browser
Built on open web standards. Works on any modern desktop browser, nothing to install.
No upload size caps
Nothing leaves your device, so there’s no server file-size limit — only your machine’s memory.
Yours to keep
Results download straight to your device in clean, standard file formats.