Free online bass test and subwoofer test. Play clean bass tones from 5Hz to 300Hz, sweep the low end, find the lowest note your speakers or headphones can play, hunt down rattles, check subwoofer phase and download any test tone as a WAV file.
One steady bass tone at the exact frequency you set. Hold a tone to check one spot, compare two speakers or listen for distortion at a set level.
The tone glides through the low end. Listen for where the bass fades out, where it suddenly booms, and where it disappears in your room. A log sweep gives every octave the same time.
The test steps down from a high bass note to a very low one. Press the button the moment the tone goes silent or turns into a flutter you feel but cannot hear. You get the lowest tone your setup really plays.
A cinema style boom that dives from a high bass note to a deep one. It shows how a subwoofer handles a fast hit and a long low tail, like an explosion in a film or an 808 in a track.
A slow bass sweep runs up and down. Walk around the room or car and press Mark Rattle when something buzzes. Each mark saves the frequency, so you can replay that exact tone and find the loose part.
The same bass tone plays in both speakers, first in phase and then with one side flipped. In phase should sound fuller and louder. If the flipped version sounds stronger, one speaker is wired the wrong way round or the sub phase switch needs changing.
A bass test plays low frequency tones, usually between 20Hz and 200Hz, so you can hear how well a subwoofer, a pair of speakers or a set of headphones handles the low end. Each tone sits at an exact frequency in hertz, and the lower the number, the deeper the sound.
Every speaker has a point where its bass runs out. A phone speaker gives up a long way above 100Hz, while a good subwoofer keeps going close to 20Hz. Running a bass test shows you where that point is on your own gear, in your own room, at your own volume.
This online bass test builds each tone live in your browser with the Web Audio API. Nothing is uploaded or recorded. You can change the frequency while the tone plays and watch the speaker cone and waveform move on the screen.
The whole test takes about a minute. Follow the line from left to right.
Set your device to about 20% and keep the volume slider low. On a subwoofer, start with the gain knob low too.
Start at 50Hz or 60Hz. Every working sub and most speakers can play it, so it proves the sound is reaching the bass driver.
Glide from 20Hz to 200Hz and listen for spots where the bass fades, booms or buzzes.
Use the Lowest Note mode and press the button when the tone vanishes. That is your real bass limit.
Move the sub, tighten loose parts or flip the phase, then run the same test to hear the change.
The bars show each part on the same 5Hz to 300Hz scale as the slider above. Press play to hear a tone from the middle of each one.
Below 20HzMostly felt as pressure or a slow flutter. Only big subwoofers and sealed headphones move air here.
20Hz to 40HzThe rumble under film effects, pipe organs and the lowest synth notes. It shows a real subwoofer from a small one.
40Hz to 60HzThe weight of a kick drum and the low strings of a bass guitar. Most music bass sits here.
60Hz to 120HzThe punch you feel in your chest. Most subwoofer crossovers are set somewhere in this range.
120Hz to 250HzWarmth in voices and instruments. Small speakers can usually reach this part even with no sub.
Speaker size and the box around it decide how low the bass goes. Play the tone in the last column to check if your device reaches its usual limit.
| Device | Usual Lowest Bass | What You Will Notice | Try It |
|---|---|---|---|
| Phone speaker | 150Hz to 300Hz | Bass below this goes quiet. You hear the beat of a kick drum, not its weight. | |
| Laptop speakers | 100Hz to 200Hz | Tones under 100Hz fade fast and may buzz at high volume. | |
| Soundbar, no sub | 60Hz to 100Hz | Good voice and mid bass, but the deep rumble in films is missing. | |
| Bookshelf speakers | 45Hz to 70Hz | Solid bass for music. Deep film effects need a sub to come through. | |
| Floorstanding speakers | 30Hz to 45Hz | Deep bass with real weight. The bottom octave still drops off. | |
| Car subwoofer | 25Hz to 40Hz | Strong low bass helped by the small cabin. Panels may rattle. | |
| Home theater subwoofer | 18Hz to 30Hz | Rumble you feel through the floor. The best subs go below 20Hz. | |
| Closed back headphones | 10Hz to 20Hz | A good seal on the ears gives very deep bass. A loose fit loses most of it. |
Typical figures. Real results change with speaker size, room, placement and volume.
These are the lowest notes of everyday instruments. If your speakers cannot play one of them, you are missing that part of the music.
The deepest note on a large concert organ, felt in the chest more than heard.
The far left key on an 88 key piano. Few speakers play it at full strength.
The extra low string used in metal, gospel and modern pop basslines.
The open low string on a standard 4 string bass, the base of most rock and pop.
The body of a kick drum usually sits around 50Hz to 60Hz, like this A1.
The bottom of a low speaking voice. Even small speakers should handle this one.
Match what you heard to one of these cards. Most bass problems come from settings, cables or the room, not a broken speaker.
The signal is not reaching the bass driver or the sub has no power.
Small speakers stop here, or a crossover is cutting the low end.
Your room is boosting some bass notes and cancelling others. It is normal and very common.
A loose part shakes at that note. It is rarely the speaker itself.
Distortion or a scraping sound at a quiet level can point to a damaged driver.
One speaker is wired backwards or the sub phase is set wrong, so the bass cancels out.
From a new subwoofer at home to a loud car system, the same few tones answer most bass questions.
Play a steady tone, then a sweep, to confirm the sub is connected, set up and playing the full low range it was sold for.
Set the amp gain and the bass boost by ear with a clean tone, then find panel rattles with the Rattle Finder sweep.
Play tones around your crossover point and listen for a dip or a hump where the sub hands over to the main speakers.
Find out how deep your headphones or earbuds go and check the ear seal. A small gap can wipe out the deep bass.
Put the sub in your seat, play the sweep and crawl around the room. Where the bass sounds smoothest is the best spot for the sub.
Run the Lowest Note test on each pair in a shop or at home and compare the numbers you get.
Everything a subwoofer test needs, from one clean tone to a full room check.
Hold a single tone, sweep the low end, find your lowest note, fire a cinema bass drop, hunt rattles with saved marks and check subwoofer phase, all from the same console.
Save any setup as a 44.1kHz stereo WAV, from 10 to 60 seconds, ready for a USB stick in the car or a home theater player.
Watch a cone and the live waveform move with the bass.
Go below hearing to test cone movement and deep subs.
Send the bass to one speaker to test each side alone.
Save each buzz frequency and replay it in one tap.
Copy a link that opens the same tone, wave and volume.
Space to play, arrows for pitch, M to mark a result.
Let a tone run for 10 seconds or up to 15 minutes, then stop by itself. Useful for gain setting and long rattle hunts.
Every tone is made on your device. There is no upload, no microphone and no account.
It is free, exact and it works on the speakers you already own.
Start far below 20Hz to see how far a sub can really move.
Tones, sweeps, drops, a lowest note finder, rattle marks and phase.
Runs in Chrome, Edge, Safari and Firefox on phone or computer.
Take clean bass tones offline for the car or home theater.
Bass tones are safe at normal levels. Steady low tones push speakers harder than music does, so these three habits protect your gear and your ears.
Begin at about 20% and turn up in small steps. Stop as soon as you hear crackling, buzzing or clicking from the speaker.
Phone, laptop and bookshelf drivers cannot move enough air for deep bass. Loud tones under 40Hz can push them past their limit.
Use the auto stop timer and give the speakers a break. Long, loud tones on headphones can tire your ears even when they feel fine.
Plain answers about subwoofers, bass frequencies, rattles and phase.
A bass test plays low frequency tones, usually from 20Hz to 200Hz, to check how well a subwoofer, speaker or pair of headphones handles the low end. It shows the lowest note your setup can play and helps find rattles and wiring problems.
Turn the volume down, press play on a 50Hz tone and check the sub makes sound. Then run the Bass Sweep from 20Hz to 200Hz and the Lowest Note test. If the sub stays silent at every tone, check its power, cable and the receiver settings first.
Start at 40Hz to 60Hz, which every working subwoofer should play clearly. Then go down to 20Hz to 30Hz to test deep bass, and up to 80Hz to 120Hz to check the crossover. A sweep covers all of it in one pass.
Most people hear down to about 20Hz. Below that, the sound turns into a flutter or pressure you feel more than hear, and it needs much more volume to notice at all.
Small speakers cannot play deep bass. Phone speakers usually stop somewhere around 150Hz to 300Hz and laptops around 100Hz to 200Hz. Use headphones or a speaker with a bigger driver to hear the lower tones.
Signs include no sound with power and signal present, distortion or scraping even at low volume, and a cone that feels rough or stuck when pressed gently. Rule out cables, settings and the source before you decide the driver is damaged.
80Hz is the most common starting point for home theater. Small speakers may need 100Hz to 120Hz, and large floorstanding speakers can go down to 60Hz. Play tones around the setting and listen for a smooth hand over with no dip or hump.
It plays the same bass tone in both speakers, then flips one side. When the wiring is right, the normal version sounds fuller. If the flipped version sounds louder, one speaker is wired backwards or the sub phase switch needs changing.
Open Rattle Finder, set a moderate volume and let the slow sweep run. Press Mark Rattle when something buzzes, then replay the saved tone and press on panels, shelves or trim until the noise stops.
It can if you play deep tones very loud on small speakers. Start at about 20% volume, raise it slowly, keep tones short and stop at the first sign of crackling or buzzing.
Yes. Closed back headphones and earbuds with a good seal can play 20Hz and lower. If 20Hz sounds weak, adjust the fit or try different ear tips before you blame the headphones.
Yes. Set up any tone, sweep, drop or phase check, pick a length and press Download WAV. You get a 44.1kHz, 16-bit stereo file for a USB stick, a car stereo or a media player.
Test speakers, headphones, your microphone and your hearing, all free and all in your browser.
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