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Speaker Test

Test your speakers online: left / right channel tones, a 20–200 Hz bass sweep and pink noise — all generated in your browser.

Left
Right

Pick a test signal. Everything is generated locally in your browser.

Honest note: browsers output plain stereo. Surround setups receive these signals only through your OS upmixing — a true 5.1/7.1 per-speaker check needs the AV receiver's own test signals.

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Result

New speakers wired up, headphones fresh out of the box, or a nagging feeling that the stereo image is off? This speaker test answers the three questions that matter: does each channel play, is left really left, and how low does the system actually go.

The Left / Right / Both buttons route a clean sine tone through a stereo panner, with an on-screen indicator showing which channel should be sounding. A frequency slider from 100 to 2000 Hz retunes the tone live, the bass sweep glides from 20 to 200 Hz over eight seconds to expose the low-frequency limit, and generated pink noise — the standard calibration signal — helps judge balance and speaker placement.

Every signal is synthesized in real time by the Web Audio API: no audio files are downloaded, nothing is recorded, and nothing leaves your browser. One honest limitation: browsers output plain stereo, so surround systems only receive these tones through the operating system's upmix — per-speaker 5.1 checks belong to your receiver.

Need a single tone at an exact frequency to keep or share? The tone generator builds a downloadable WAV at any frequency from 20 Hz to 20 kHz — this test is for quick live checks of channels, bass and balance.

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Executed in Browser

Your files and inputs never leave this device. Processing runs completely offline. 100% Secure.

Accepted Formats & Rules

  • Left / Right / Both channel buttons routed through a StereoPannerNode, with a visual indicator of which channel is playing.
  • Bass sweep that glides from 20 to 200 Hz over 8 seconds, plus locally generated pink noise for balance and placement checks.
  • Frequency slider from 100 to 2000 Hz that retunes the test tone live while it plays.

Key Benefits

✓ Instant answer: one click plays a clean test tone through the left, right or both channels, so swapped or dead speakers show up immediately.
✓ Real signals, not recordings: every tone, the bass sweep and the pink noise are synthesized live by the Web Audio API — nothing is downloaded or uploaded.
✓ Full low-end check: the 20→200 Hz sweep and adjustable 100–2000 Hz tone reveal where your speakers or subwoofer stop producing audible sound.

Use Cases

  • • Verify a new stereo setup: play the Left and Right tones and catch swapped cables or a dead channel before you screw the speakers to the wall.
  • • Run the 20–200 Hz bass sweep to hear the lowest frequency your speakers or subwoofer actually reproduce — and to hunt down rattling grilles and buzzing furniture.
  • • Play pink noise through both channels to compare speaker balance and placement by ear when arranging a desk or a listening room.