Controlled starting point
The initial +6 dB shelf and −6 dB preamp emphasize bass without beginning above the original peak ceiling.
Bass booster online
with controlled headroom
Start with a +6 dB low shelf centered at 320 Hz and a −6 dB preamp, then compare, adjust, and export in the browser.
+6 dB starting boost−6 dB preampA/B comparison
You can also drag and drop an audio or video file anywhere on this page.•Compatibility depends on the file codecs and device: MP3, WAV, M4A, AAC, FLAC, OGG, WebM, MP4, MOV, MKV, and more
A bass-focused workflow, not another generic equalizer page
The starting curve raises frequencies below the 320 Hz shelf relative to mids and highs. A matching −6 dB preamp creates headroom before the boost. You can still adjust the three fixed bands and listen with the tone filters bypassed.
Shared DSP
The tool reuses the same tested three-band filters for preview and export.
Visible curve
The calculated response graph shows how the current bass, mid, and treble values shape the signal.
How to boost bass without losing control
A bass boost changes tonal balance and can also change peak level. Compare at a comfortable playback volume and leave room for the result.
- 1
Start from the controlled preset
Open the file with the +6 dB low shelf and −6 dB preamp. This gives the bass room to rise before you make further changes.
- 2
Compare, then refine
Use A/B bypass and adjust one band at a time. Judge the low end on a representative section instead of relying only on the curve.
- 3
Check more than one speaker
Preview on headphones and, when possible, a phone or small speaker. Export only after the bass remains clear without masking voice or kick detail.
Clipping, headroom, and audible limits
- The clipping indicator is conservative; overlapping frequencies and source phase can change the real result.
- Extra bass cannot recreate low frequencies that are absent from the recording.
- Small speakers may not reproduce the boosted range and can distort at high playback volume.
- This is a fixed three-band EQ, not a parametric equalizer, compressor, or limiter.
Where a bass-focused curve can help
- Give thin music a warmer low-frequency balance.
- Compare a bass-forward version with the original before export.
- Reduce mids or treble after the starting preset when the low end needs more relative emphasis.
What each bass control contributes
The three-band design stays deliberately simple, but each control has a different role in the result.
ControlWhat it changesListening check
Bass shelf
Raises or lowers frequencies below the 320 Hz shelf relative to the rest.
Listen for weight and warmth, but also muddiness in voice, bass guitar, and kick drum.
Preamp
Changes level before the tone filters and provides headroom for boosts.
Lower it when the peak warning appears or the boosted version sounds strained.
Mid and treble bands
Rebalance clarity and brightness around the boosted low end.
Small cuts can emphasize bass relatively without adding another large low-frequency boost.
Bass processing stays in the browser
The selected audio is decoded, previewed, and rendered in browser memory. It is not uploaded to the application server for the bass effect. Site resources and consented analytics may still make network requests.
Bass-booster questions
What to expect from the low-shelf workflow on music, speech, headphones, and small speakers.
Can the tool create bass that is missing from the recording?
No. Equalization can emphasize existing low-frequency content, but it cannot recreate fundamentals removed by recording equipment, filtering, or heavy compression.
Why does the preset include a −6 dB preamp?
Boosting a frequency range can raise peaks. The negative preamp creates starting headroom and reduces the chance of immediate clipping.
Why is the effect weak on a phone speaker?
Small speakers often cannot reproduce the lowest frequencies efficiently. A boost may be clearer on headphones or larger speakers and may cause distortion on small drivers.
Is the clipping indicator exact?
It is a conservative guide based on the processing settings. The source spectrum, phase, and overlapping filters affect the actual rendered peak, so listening and final peak checks still matter.