How to bass boost audio in 3 steps
- 01
Open your track
Click Open file, drag a song into the drop zone, or choose Try a demo to hear the effect on a sample loop first. The file decodes and processes locally, without being uploaded.
- 02
Set gain, frequency and shape
In Studio settings, pick shelf or peak, set the frequency between 30 and 250 Hz and the gain up to 18 dB, or start from a preset like Punch or Deep sub. Set a limiter ceiling to protect against clipping.
- 03
Preview, compare and export
Click Render preview and switch between Original/Processed to check the boost sounds right, not just louder. Pick an output format and click Download audio when you are happy with it.
What you can do with this bass booster
- Boost low end by up to 18 dB, from a subtle lift to a heavy push.
- Target any frequency from 30 to 250 Hz, covering everything from sub-bass rumble to punchy low-mid attack.
- Choose a shelf shape for a broad, even boost across all frequencies below your setting, or a peak shape for a narrower, punchier lift.
- Fine-tune peak width with Q from 0.3 (broad) to 3 (narrow and focused).
- Protect against clipping with a built-in headroom limiter, with a ceiling adjustable from -6 to -0.1 dBTP.
- Hear the boost update live while the track plays, with live preview.
- Start from 5 presets — Gentle, Deep sub, Punch, Warm, Extreme — then adjust to taste.
- Compare boosted and original audio instantly with the Original/Processed toggle.
- Export the boosted track in standard formats once you are happy with the result.
What does a bass booster actually do?
A bass booster raises the level of a track's low-frequency content, using a shelf or peak filter centered somewhere between 30 and 250 Hz. It does not invent bass that was never recorded — it amplifies the low end that is already present in the file, so a track with almost no bass to begin with will not suddenly gain deep sub content it never had.
This is a narrower, more focused tool than the full equalizer: where the equalizer gives you 8 independent bands across the whole spectrum, bass boost gives you one purpose-built low-end control with a shape (shelf or peak), a frequency, a gain amount, and a limiter to protect the result — faster to dial in when bass is the only thing you want to change.
Shelf vs. peak: which shape should you use?
A shelf boost raises everything below the chosen frequency by roughly the same amount, tapering off above it. It is the broader, gentler-feeling option, good for adding overall warmth and fullness across a whole track without emphasizing one specific note, beat or instrument more than the others, which makes it a safe default when you are not sure which shape you need yet.
A peak boost instead raises a narrower band centered on the chosen frequency, with Q controlling how wide that band is — a low Q spreads the boost out, a high Q focuses it tightly. Peak boosts are what people usually mean by "punch": a focused lift around the fundamental of a kick drum or bass note stands out more than a broad shelf does, without pushing up every low frequency in the mix.
Bass frequency guide
Not all bass sits in the same place, and boosting the wrong part of the range is a common reason a bass boost sounds boomy rather than punchy. The 30 to 250 Hz range this tool covers actually spans three fairly distinct feelings, and knowing which one you are chasing before you touch the frequency knob saves a lot of trial and error.
As a rough rule, reach for sub-bass when you want weight that is felt more than heard, body when you want overall fullness and warmth, and punch when you want a boost that still cuts through on smaller speakers. Most tracks benefit most from the body and punch ranges rather than sub-bass alone, especially anything destined for phones, laptops or car systems rather than a full studio monitor setup.
| Range | Frequency | What it does when boosted |
|---|---|---|
| Sub-bass | 30–60 Hz | Adds rumble and weight you feel more than hear; too much can overwhelm small speakers |
| Body | 60–120 Hz | Adds fullness and warmth — the "thump" behind a kick drum or bass note's fundamental |
| Punch | 100–250 Hz | Adds attack and presence — the part that still cuts through on car and phone speakers |
Why boosting a mastered track can clip, and how the limiter helps
A finished, mastered track is usually already using most of its available headroom — its loudest peaks sit close to 0 dBFS, with little room left to spare. Adding a bass boost on top raises the level in that frequency range further, which can push those peaks over the top and cause clipping: a harsh, crackling distortion that gets worse the harder you push, and that no amount of EQ can undo afterward.
That is what the built-in headroom limiter is for. It catches peaks before they cross the ceiling you set, from -6 up to -0.1 dBTP, so a boosted mastered track does not clip on export even when the boost itself is significant. Heavier boosts still ask more of the limiter, and very aggressive settings can start to audibly pump or squash the sound, so it is worth listening critically rather than judging by loudness alone.
Bass boost for headphones, car and small speakers
On headphones, most of the 30 to 250 Hz range comes through clearly, so moderate settings translate well, though in-ear monitors can make sub-bass feel more intense than over-ear headphones at the same gain. In a car, factory and aftermarket systems already tend to emphasize low end, so a track boosted heavily elsewhere can turn boomy — the Gentle or Warm presets are often enough.
Small speakers, including most phones and laptops, physically cannot reproduce true sub-bass below roughly 100 to 150 Hz no matter how much gain you add there — the driver simply cannot move enough air at those frequencies. For audible impact on those devices, the Body and Punch ranges around 80 to 250 Hz matter far more than pushing sub-bass, since that is the part small drivers can actually reproduce.
What to expect
Bass boost amplifies existing low end; it cannot recover bass that was filtered out, recorded on a device that could not capture it, or otherwise missing from the source. Heavy boosting on an already loud, fully mastered track relies on the limiter more, and can introduce audible pumping even without hard clipping — that is expected behavior at extreme settings, not a malfunction.
If you want overall level changes rather than a specific frequency shape, volume booster is the better tool, since it targets loudness rather than one part of the spectrum. If mud around 250 to 500 Hz builds up after boosting, a narrow cut in the equalizer can clean it back up without undoing the boost itself, since the two tools solve different, complementary problems.
Tips for better results
- Start with the Gentle preset and A/B against the original before pushing the gain any higher.
- Use a shelf for overall warmth across a whole track; use a peak with a focused frequency and higher Q when you want punch without thickening everything below it.
- Lower the limiter ceiling, closer to -3 or -6 dBTP, on already loud or mastered tracks to leave more room before heavy limiting kicks in.
- If the result sounds boomy instead of punchy, narrow the Q and move the frequency down toward the body range around 60 to 120 Hz.
- Follow up with the equalizer if boosting brings up mud around 250 to 500 Hz — that is a job for a band cut, not the bass shape controls.
- Preview on the device you will actually use if you can — phone and laptop speakers roll off around 100 to 150 Hz, so an extreme sub-bass boost may do nothing there.
Frequently asked questions
What is bass boost?
Bass boost raises the level of a track's low-frequency content using a shelf or peak filter, so kick drums, bass lines and sub content sound fuller or punchier. It amplifies bass that is already in the recording rather than adding new content.
How do I add bass to a song?
Open the track, choose shelf or peak shape, pick a frequency between 30 and 250 Hz, and set the gain — or start from a preset like Punch or Deep sub. Render preview and A/B against the original before exporting.
What frequencies does bass boost affect?
This tool works between 30 and 250 Hz, covering sub-bass rumble around 30 to 60 Hz, body and warmth around 60 to 120 Hz, and punch and attack around 100 to 250 Hz. Shelf mode boosts everything below your chosen frequency; peak mode focuses more narrowly around it.
Will bass boosting distort my audio?
It can, especially on already loud or mastered tracks, since a boost raises peak levels and can push them past 0 dBFS. The built-in headroom limiter, with a ceiling you set from -6 to -0.1 dBTP, catches those peaks so exported audio does not clip.
Is this bass boost tool free, and do I need to upload my audio?
Yes, it is free to use, with no sign-up and no watermark on the exported file. It also needs no upload — processing runs on your device in the browser, and your file is never sent to a server.
What audio formats work for bass boost?
Any format your browser can decode, including MP3, WAV, FLAC, OGG/Opus, M4A/AAC and AIFF, works as input. Export as WAV, MP3, FLAC, OGG Vorbis, Opus, M4A or AIFF, with your choice of sample rate and channels.
What's the difference between shelf and peak?
A shelf boosts everything below the chosen frequency by roughly the same amount, for a broad, warm lift. A peak boosts a narrower band centered on the frequency, with Q controlling its width, for a punchier, more focused effect.
How much bass boost should I use?
There is no universal number — it depends on the source and your gain setting, which goes up to 18 dB. Start with the Gentle preset, A/B against the original, and increase only as far as it still sounds clean rather than distorted.
What's the difference between bass boost and the volume booster?
Bass boost shapes one part of the frequency range with a shelf or peak filter. Volume booster changes overall level or loudness across the whole track using gain, peak normalization or loudness normalization — reach for that one when you want the whole track louder, not just fuller bass.
Can I bass boost a track that already has strong bass?
Yes, but it is more likely to need the limiter, since there is less headroom to begin with. Use a lower gain and a lower limiter ceiling, and check for pumping or clipping in the Render preview.
Is bass boosted audio safe for speakers?
Moderate boosts on reasonable playback volume are generally fine. Extreme boost combined with high volume on small or cheap speakers can stress the drivers, so it is worth easing off on devices you are not sure can handle it.
Does this work on mobile devices?
Yes, it runs in a mobile browser the same way it does on desktop, with the same shelf, peak and limiter controls available. Very large files may process more slowly on a phone with limited memory, so shorter clips tend to work best.
Can I preview before downloading?
Yes. Live preview lets you hear the boost while the track plays as you adjust gain, frequency and shape, and Render preview generates the finished version, which you can A/B against the original before deciding to export it.