Bass Test – Subwoofer & Low Frequency Test
Subwoofer & low endMind the volume
- 20–60 Hz: felt more than heard
- 60–250 Hz: punch and warmth
- Rattles show up while sweeping
- Laptop: about 150–250 Hz
- Bookshelf: about 60–100 Hz
- Headphones: 20–60 Hz
Bass Test & Subwoofer Test
Find out how low your speakers, subwoofer or headphones go. Play fixed bass test tones or run a 200 → 20 Hz sweep and note where bass fades or rattles.
20–200 Hz Range
Play single low tones to find the lowest note your system reproduces cleanly.
Downward Sweep
Slide from 200 Hz to 20 Hz and note where the bass fades or starts to buzz.
Rattle Finder
Hold a deep tone to locate loose panels, grilles or objects that vibrate.
How to
Run a Bass Test
- 01
Set the volume low
- 02
Play 100 Hz, then step down through 60, 40, 30 and 20 Hz
- 03
Note the lowest tone you clearly hear or feel
- 04
Run the sweep and listen for rattles, booms or drop-outs
Sub-bass vs mid-bass
Sub-bass (20–60 Hz) is rumble you feel: explosions, organs, 808 kicks. Mid-bass (60–250 Hz) is punch and warmth. Small speakers may produce mid-bass but little sub-bass, which is physics, not a fault.
Understanding your results
| Lowest clear tone | Typical device |
|---|---|
| 150–250 Hz | Phones, laptops, smart speakers |
| 60–100 Hz | Bookshelf speakers, earbuds |
| 40–60 Hz | Larger monitors, good headphones |
| 20–35 Hz | Subwoofers, sealed or planar headphones |
Headphones often go lower than speakers because they seal a small air volume against the ear.
Common bass problems and fixes
Rattling or buzzing
Sweep slowly, note the frequency, then touch nearby objects: screws, grilles, frames and desk items often resonate. A rattle inside the speaker at moderate volume may mean a damaged surround or voice coil.
Boomy, one-note bass
A room mode. Move the speaker or sub away from corners, change seat position, or EQ the peak down.
Weak or missing bass
Check phase on the speaker test, the sub's crossover and level, and the receiver's speaker-size settings.
Headphones distort on deep bass
Reduce volume or EQ boost and improve the seal (larger ear tips, check pads).
Related guides and fixes
Learn more in these guides: How to test a subwoofer, Subwoofer not working, No sound on Windows, No sound on Mac, Headphones only one side, Speakers crackling.
Subwoofer placement: the “sub crawl”
Put the sub at your seat, play a sweep, then crawl around the floor where the sub could go. Where bass sounds smoothest is where the sub belongs. Then set the crossover (usually 80 Hz), match the level to your mains and pick the phase setting (0°/180°) that sounds fuller.
Is bass testing safe?
Yes, at sensible volume. Very low tones can over-drive cones before they sound loud, so start quietly and stop if you hear knocking or harsh distortion.
Bass in use
Repeatable bass problems
Use the same tone and seat every time so you compare like with like.
Music production
Check that mixes translate by testing the low end on several systems.
Home theatre
Combine the bass test with the subwoofer test for crossover and placement.
Method
Find repeatable bass problems without raising volume
Keep volume fixed and compare tones.
Your room is part of the equation
Below about 200 Hz, room dimensions create standing waves. At some frequencies the bass doubles at your seat; at others it nearly vanishes. Step through the tones and note which ones are much louder or quieter, then move the speaker or seat 30–50 cm and repeat. Changes that follow your position are room effects, not speaker faults.
When it's time to upgrade
If tones below 50 Hz are inaudible on your speakers at reasonable volume, they have reached their physical limit. A subwoofer extends the bass; bigger bookshelf speakers alone rarely go much lower.
Using the bass tester with earphones, laptops and phones
Most laptop and phone speakers cannot play deep bass, so a 40 Hz tone may be silent on them even though nothing is broken. For a fair bass test, use earphones with a good seal (try a larger ear tip), headphones, or external speakers. With earbuds, a loose fit loses most of the bass; press them in gently and play the tone again.
Frequently Asked Questions
Q.How low can humans hear?
About 20 Hz; below 30 Hz it is felt as much as heard.
Q.I can't hear 20–30 Hz. Is my equipment broken?
Probably not. Most speakers roll off before 30 Hz.
Q.Why do my speakers rattle during the bass test?
Loose parts, objects on the speaker or a damaged driver. Lower the volume and isolate the source.
Q.Why does bass change around the room?
Room modes create peaks and nulls at low frequencies.
Q.What crossover should I set for my sub?
80 Hz is a common default; lower for big speakers, higher for small satellites.
Q.Should the sub phase be 0 or 180?
Whichever sounds fuller at your seat with an 80 Hz tone.
Q.Can I test car audio?
Yes. Play via Bluetooth or AUX and sweep to find panel rattles.
Q.Is a bass test bad for headphones?
Not at moderate volume. Stop if you hear crackling.