Bass Test – Sweep 20 Hz to 200 Hz

Hear how deep your speakers or headphones go. Our slow bass sweep reveals weak lows, rattles and distortion.

Bass Test – Sweep 20 Hz to 200 Hz

Free • Works in browser
20 HzReady

⚠ Keep volume low to start. Loud tones, especially high ones, can hurt your ears and damage small speakers.

✓ 100% Free✓ No App Needed✓ Works on iPhone & Android✓ Private — runs in your browser

What Does the Bass Test Do?

The tool plays a pure tone that rises slowly from 20 Hz to 200 Hz and repeats. You hear how your device handles deep bass. A healthy system gets louder and clearer as the sweep passes 60 to 100 Hz. Phones usually fade out below 100 Hz, while good headphones and subwoofers continue down to 30 Hz or lower.

How to Run the Test

  1. Use headphones or a good speaker.
  2. Start at low volume and raise it slowly.
  3. Note the frequency shown when the sound becomes audible.
  4. Listen for buzzing, rattle or fluttering.
  5. Try again with the case removed.

Interpreting Results

  • Audible from 40 Hz: strong bass response
  • Audible from 60 to 80 Hz: average
  • Audible from 100 Hz or higher: small speaker
  • Rattle at a specific frequency: loose part, case or cone problem

For subwoofer specific tips see the subwoofer test.

Protect Your Equipment

Low frequency at high volume can damage speakers. Increase volume slowly, and stop if you hear popping or scraping. Learn more about a subwoofer.

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Frequently Asked Questions

Why can I not hear anything below 80 Hz?

Small speakers cannot reproduce it. It is normal for phones and laptops.

Why does my speaker rattle?

A loose enclosure part, case or damaged cone.

What volume is safe for a bass test?

Start low and increase to moderate only.

Can I test a subwoofer?

Yes, use the sweep and listen for smooth output.