Free Bass Test — Subwoofer Sweep 20-200 Hz

Bass Test

Sweep 20 Hz → 200 Hz, step through ISO bass frequencies, or hold a single tone to verify your subwoofer, studio monitors, or bass-capable headphones.

🔊 Tip: Use a subwoofer or bass-capable speaker for best results. Start with lower volumes and increase gradually to feel the bass frequencies.

🔉

Bass Visualizer

Select a frequency below to begin

Volume 30%

Quick Bass Test Frequencies

Sweep Tests

📊 Full Sweep

20Hz to 200Hz

🎯 Sub-Bass

20Hz to 60Hz

📈 Mid Bass

80Hz to 150Hz

🎼 Upper Bass

150Hz to 200Hz

Test Information

Status Ready

Current Test None

Frequency -

Duration -

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Bass Test guide

How to use the Bass Test accurately

This tool generates pure sine-wave tones between 20 Hz and 200 Hz using the Web Audio API, live in your browser. No downloads, no uploads, no tracking. You choose the mode (sweep, step, or hold), the channel (left / right / both mono), and the volume.

01 What The Bass Test Does This tool generates pure sine-wave tones between 20 Hz and 200 Hz using the Web Audio API, live in your browser. No downloads, no uploads, no tracking.

02 Sub-Bass vs. Bass: Why The Split Matters Audio engineers split the low end into two bands because the physical requirements are different. Sub-bass (20-40 Hz) is frequency you feel more than hear — it needs a real subwoofer or a full-range studio monitor to reproduce.

03 Why Sine Tones, Not Bass Music Music is a complex mix of frequencies, so if the bass sounds "off" you cannot tell which frequency is wrong. A pure sine is one frequency with no harmonics — if the 40 Hz tone buzzes but 60 Hz is clean, you know the problem is...

04 Safety Note Low-frequency sine waves demand a lot of cone excursion. Small drivers hit their mechanical limit quickly, and past that limit they can physically bottom out, distort, or (at high enough volume) tear the voice coil.

bass test online subwoofer test low frequency test bass sweep 20 Hz to 200 Hz sub-bass test

Music is a complex mix of frequencies, so if the bass sounds "off" you cannot tell which frequency is wrong. A pure sine is one frequency with no harmonics — if the 40 Hz tone buzzes but 60 Hz is clean, you know the problem is between 30 and 50 Hz.

Bass Test FAQ

Common bass test questions

What frequency range does this bass test cover?

From 20 Hz (the lower limit of human hearing) up to 200 Hz (where bass meets the lower midrange). The full sweep walks that range logarithmically, and the step presets hit the ISO 1/3-octave bass centres: 20, 25, 31, 40, 50, 63, 80, 100, 125, 160, and 200 Hz.

Why does my laptop not play the 20-40 Hz tones?

Most laptop, phone, and earbud drivers are physically too small to move enough air below roughly 60-80 Hz. Silence at 20-40 Hz on those devices is expected, not a defect. A subwoofer or a full-range studio monitor is required to hear sub-bass cleanly.

Can this test damage my speakers?

Only if you run high volume for extended periods. Low-frequency sine waves demand a lot of driver excursion, and past the driver limit they can distort or bottom out. Start at 20-30 percent volume, listen for distortion or cone clack, and stop increasing volume the moment either appears.

What is the difference between bass and sub-bass?

Sub-bass is 20-40 Hz — frequencies you feel more than hear, reproduced cleanly only by subwoofers or full-range monitors. Bass is roughly 40-120 Hz, where kick drums and bass guitars live. Upper bass (120-200 Hz) starts to blend into lower midrange and is easy for almost any speaker.

Do I need a subwoofer to pass this test?

No. You need a subwoofer to pass the sub-bass portion (below 40 Hz). Full-range studio monitors, large bookshelf speakers, and bass-capable over-ear headphones can reproduce most of the 40-200 Hz range without one.