The Bass Test plays low-frequency tones between 20Hz and 200Hz so you can find out how deep your speakers or subwoofer actually reach. Drag the frequency slider to a target frequency, click Play, and listen — if you hear the tone clearly, your speakers reproduce that frequency; if you get nothing or just a faint vibration, your speakers roll off before that point. The current frequency display updates in real time as you move through the range, making it easy to find your speaker's low-end limit. A tone generator lets you play any frequency from 20Hz to 20kHz directly in your browser.
Sweep through all bass frequencies to test your speaker's full range.
The bass test covers 20 Hz to 200 Hz — the entire low-frequency band. Different parts of this range have distinct sonic characters, and not all speakers or headphones can reproduce every sub-range. The stereo test plays audio through each channel independently to catch balance and routing issues.
Sub-bass is felt more than heard — it's the rumble in cinema explosions, the vibration in EDM drops, and the fundamental pitch of a bass guitar's lowest notes. Reproducing these frequencies requires a subwoofer or large, high-excursion drivers. Laptop speakers and most desktop monitors roll off entirely below 60 Hz.
Deep bass is where kick drums thump and bass guitars start to become tonally recognisable. Quality headphones and bookshelf speakers can typically reach into this range. If your bass test shows no output below 80 Hz, your setup is missing a significant portion of recorded music.
The core bass region is reproduced by most full-range speakers and better headphones. Warmth, body, and fullness in vocals and instruments live here. If your bass test sounds thin or nasal, insufficient output in this band is usually the cause.
Upper bass overlaps with the lower midrange. This frequency band affects how "boomy" or "muddy" audio sounds. Over-emphasis here creates the boxy colouration common in small, enclosed speakers. The bass test slider makes it easy to isolate and hear this region independently.
Different devices have very different bass response limits. Understanding where your device sits helps you interpret the bass test results correctly:
Laptop speaker drivers are typically 15–40 mm in diameter with a short excursion distance. Reproducing 40 Hz requires a cone to move several millimetres — impossible in that form factor. Even with EQ or bass enhancement software, the speaker physically cannot displace enough air to produce sub-bass. The bass test will confirm silence below 150 Hz on most laptops.
Quality over-ear headphones should play a clear, undistorted tone from 200 Hz all the way down to 20 Hz, though volume drops naturally as frequency decreases. Bass-boosted headphones sound loudest around 60–80 Hz but may distort at very high volumes below 40 Hz. If you hear rattling or buzzing during the bass test, the driver may be overdriving or the ear cup seal is broken.
If you can't hear anything below 80 Hz, first rule out hardware limits (most laptops genuinely can't produce sub-bass). If the device should be capable, check: equaliser settings cutting the bass, Bluetooth connection using a narrow-band codec, or a subwoofer crossover set too low. Also check if the subwoofer power switch is on — a surprisingly common miss. A headphone test reveals reversed channels, silent drivers, or uneven volume between ears.
Distortion during the bass test is the clearest sign your speakers are being pushed beyond their limits. Reduce volume first. If distortion persists at moderate levels at a specific frequency, the driver cone may be damaged or the enclosure is resonating. A port duct vibrating against the cabinet body is another common source of bass distortion.
This is normal — speakers interact with the room. Room modes create bass build-up at specific frequencies depending on room dimensions. A frequency that sounds exaggerated through speakers may sound accurate through headphones. The bass test is most reliable through headphones because it bypasses room acoustics entirely.
If you're running a 2.1 speaker system, the subwoofer's crossover dial determines which frequencies the sub handles and which the satellite speakers reproduce. The standard crossover point is 80 Hz — the THX reference setting. Use the bass test to play an 80 Hz tone first through your satellites alone, then confirm the subwoofer takes over smoothly as you sweep down toward 60 Hz. If you hear a gap or dip around the crossover frequency, raise the crossover dial slightly. If the bass sounds boomy or thick at your primary listening position, try moving the subwoofer closer to a wall corner — room reinforcement can compensate for under-powered bass output without changing the crossover setting.
The slider goes down to 20 Hz, the accepted lower boundary of human hearing. Frequencies below 20 Hz are infrasound — you may feel vibration but won't hear a pitch. The Quick Test buttons also include 20 Hz and 30 Hz for direct access to the sub-bass range.
Either your speakers don't reproduce those frequencies, or you're listening at a volume too low for them to be audible. Sub-bass tones at 20–40 Hz need more volume to be perceived than mid-bass tones. Slowly increase volume while at 30 Hz — if you still hear nothing at a moderate level, your speaker's low-frequency bass response cuts off above that point.
Yes, if you keep volume at 50% or below. Extended sine waves at very high volume and extremely low frequencies (under 25 Hz) can over-excite the driver and damage the voice coil over time. The bass sweep test is a better choice for safety — it keeps the driver moving rather than dwelling on one frequency for too long.
A quality home theatre subwoofer should reproduce tones clearly down to 20–25 Hz. A budget subwoofer typically reaches 35–40 Hz. Car subwoofers vary widely but most quality units extend to 25 Hz. Use the bass test slider at 20 Hz and 30 Hz to benchmark your subwoofer's actual low-frequency extension.
Distortion at high bass volumes is called "clipping" at the amplifier level, or "cone breakup" at the speaker level. When the driver tries to move further than its mechanical limits allow, it can't reproduce the waveform cleanly. Reduce volume, or if distortion persists at moderate levels, the driver may be damaged.
Partially. Play a 60–80 Hz tone and then have someone swap the subwoofer's phase switch (0°/180°). If the bass sounds fuller in one position, that phase setting is correct for your room. For a proper polarity test, use a dedicated polarity checker or compare bass level changes with and without the satellite speakers playing simultaneously.
If you can't hear frequencies below 40Hz, your speakers may not support sub-bass. Try with a subwoofer or bass-capable headphones. Use our hearing test to check the lowest frequencies you can perceive.
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