Controlled signal
The tool generates the test inside your browser with a bounded app-level gain. Your operating-system and hardware volume remain separate.
Online Bass Test
Low frequencies demand more movement and amplifier power than midrange tones. Start quietly, check for clean output, and never use extreme volume to force an inaudible bass tone.
Low-frequency caution: Very low tones can consume substantial amplifier power without sounding loud. Never make a large volume jump to force an inaudible tone.
Local by default
Output tests do not upload audio. Microphone tools request permission only when started and explicitly state what stays in memory.
SCOPE / 01
What this test checks
The bass rack plays individual sine tones from 20 to 200 Hz at a reduced app level. Moving downward in small steps helps distinguish gradual low-frequency roll-off from a repeatable rattle or sudden distortion.
- Checking headphone seal, speaker bass output, a subwoofer connection or a low-frequency rattle.
- Comparing the same device before and after changing placement, fit or EQ.
- Which controlled bass tones produce an audible response at the current setup and level.
- Whether a rattle or breakup repeats at one selected frequency.
- Whether changing seal, placement or EQ alters the same observation.
- Subwoofer extension, acoustic sound pressure or room response in decibels.
- A hearing threshold or safe maximum output level.
PROCEDURE / 02
How to run this test
Keep the level moderate and change one thing at a time so the result remains useful.
- 01
Start at 80 Hz with low volume.
- 02
Move downward in small steps while keeping system volume fixed.
- 03
Listen for clean bass rather than maximum loudness.
- 04
Stop if you hear knocking, severe rattling or strain.
INTERPRETATION / 03
What your result means
Match what you heard or saw, change one variable, then use the linked check to verify the result.
| Observation | Likely cause | Next step | Retest |
|---|---|---|---|
| 0180 Hz is clear but lower tones become gradually quieter. | The driver, enclosure, headphone seal or available amplifier power may be rolling off naturally toward low frequencies. | Check fit and placement, but do not force an inaudible tone with a large volume increase. | Review low-volume causes |
| 02One frequency triggers a repeatable rattle. | A cabinet part, port, desk, wall or nearby object may be resonating rather than the digital signal clipping. | Move loose objects and use nearby single-frequency steps to isolate the narrowest problem range. | Find the exact tone |
| 03Bass becomes rough or knocks at higher level. | The driver or amplifier may be exceeding its clean operating range, particularly with EQ boost. | Stop, lower every gain stage and bypass bass boost before repeating at a moderate level. | Check distorted audio |
| 04Bass changes substantially when headphones are pressed or reseated. | Leakage around the ear tips or pads is reducing the acoustic seal needed for low-frequency pressure. | Adjust fit or tip size and repeat the same tones without changing volume. | Retest the headphones |
VARIABLES / 04
Why results can vary
The generated signal stays controlled; the physical device, room and system path can still change what reaches you.
Driver and enclosure size
Small drivers can reproduce a low-frequency waveform electrically while producing little audible acoustic output.
Headphone seal
Even a small leak around an ear tip or pad can reduce bass dramatically.
Room modes and placement
Walls and listening position can reinforce or cancel bass at different points in the room.
Amplifier power and EQ
Low tones demand substantial excursion and power; boost can produce strain before the tone seems loud.
LIMITS / 05
Browser limits and safety
Online Bass Test questions
What frequency counts as bass?
This tool focuses on roughly 20–200 Hz, with sub-bass commonly considered the lowest part of that range.
Why is 30 Hz very quiet?
The driver, enclosure, room, headphone seal and playback level all affect low-frequency output.
Should I turn up the volume?
Do not make large jumps. Extreme low-frequency signals can consume substantial power without sounding loud.