Subwoofer Kick Test: Kick Drum Bass Test, 80Hz to 20Hz
Overview
Subwoofer Kick Test fires short, punchy low-frequency impulses through your sub so you can confirm it's producing real, audible output rather than just felt vibration in the floor. Pick a frequency mode from 30Hz to 80Hz, choose a single hit or a repeating pulse, then click Send Kick and listen for a clean transient response. The live microphone frequency spectrum analyzer runs entirely client-side, so your readings stay private.
Most people buy a sub to get louder basses, but its real job is deeper basses. The subwoofer kick test plays a short kick drum at falling pitches so you can hear whether your sound system gains depth without a jump in level. These test tones put low-frequency audio where bass punch and sound weight live.
How the Subwoofer Kick Test Works
Each of the test files is the same kick drum test hit, modelled on the analog kick drum of the Roland TR-808 drum machine, tuned to a lower frequency each time. The subwoofer kick drum test steps from 80Hz down to 20Hz in 10 hertz steps. On a system that is properly set up, every kick lands at the same loudness; only the depth changes. The noise generator tool gives you full control over frequency and volume before you start.
Below is one kick test run, measured at the listening seat.
| Kick pitch | Main speakers only | Subwoofer turned on |
|---|---|---|
| 80Hz | 76 dB | 77 dB |
| 70Hz | 75 dB | 77 dB |
| 60Hz | 72 dB | 76 dB |
| 50Hz | 67 dB | 76 dB |
| 40Hz | 61 dB | 75 dB |
| 30Hz | 54 dB | 73 dB |
| 20Hz | 46 dB | 66 dB |
Two Test Conditions: Main Speakers, Then Subwoofer Turned On
Run the drum sequence in two test conditions and keep the volume fixed between them:
- Play every kick through the main speakers alone and note the sound of each one.
- Switch the sub on and replay the same kicks, using the slider or presets to repeat any pitch.
- If you have a phone SPL meter, log each reading, as in the table.
That makes subwoofer testing a comparison, not a guess.
Reading Subwoofer Test Results: Depth vs Bass Level
In the example, the mains fade by 30 dB from 80Hz to 20Hz, while the subwoofer test with the sub on stays within 4 dB from 80Hz to 30Hz. At 80Hz the sub adds just 1 dB, so it extends the low frequencies instead of raising the bass level. If the top kicks got much louder with the sub on, it is acting as an equalizer or bass boost, not adding deep bass. The lowest frequency kicks are felt more than heard: a physical rumble is what you get in music, movies and gaming. Headphones reach this region, earbuds usually stop short and laptop speakers cannot play it, so most speakers fail a free online bass test there no matter what audio equipment drives them. The same rule holds for any online bass test or bass test online page: judge bass test sounds by their depth at a steady level, not by how loud they get. The room reverb rt60 test tool gives you a clear answer instead of guessing.
Sub-Bass vs Mid-Bass Frequency Range
- Sub-bass (roughly 10Hz to 60Hz): rumble and pressure, the low-end most mains miss.
- Mid-bass (about 60Hz to 200Hz): the punch of kick drums and the warmth of bass guitars, handed up to the midrange and treble above it.
Hearing both halves of the frequency range clearly means your bass frequencies blend.
Tuning a Basement Sub With the Subwoofer Kick Drum Test
I'm setting up a 10-inch ported sub in a basement room whose side walls are 3.43 m apart, and the question is simple: is the receiver's auto-setup leaving the sub too hot? The answer turns out to be yes, by about 3 dB. The receiver crosses over at 80 Hz and has already set the sub channel to the usual 75 dB pink-noise calibration level, so the kicks are the check on that number, not a replacement for it.
With a phone meter on C-weighting at ear height, I play each kick with the sub on and log the reading:
| Kick | Sub trim 0.0 dB | Sub trim -3.0 dB |
|---|---|---|
| 80 Hz | 81.5 dB | 80.0 dB |
| 60 Hz | 84.5 dB | 81.5 dB |
| 50 Hz | 85.0 dB | 82.0 dB |
| 40 Hz | 83.5 dB | 80.5 dB |
| 30 Hz | 79.0 dB | 76.0 dB |
At the default trim the 50 Hz kick lands 3.5 dB above the 80 Hz kick. That is the sub acting as a bass boost: the deep kicks shouldn't be louder than the ones the mains share. After I drop the trim to -3.0 dB, the 80 Hz to 40 Hz kicks sit within 2.0 dB of each other, inside the plus-or-minus 3 dB window most room-calibration guides aim for.
The 50 Hz peak is the part I don't trust. The speed of sound over twice the wall spacing, 343 ÷ (2 × 3.43), gives exactly 50 Hz, the room's first side-to-side mode. Moving my seat 60 cm toward the centre would tell me whether the peak follows the room or the sub; if it shifts, no trim setting will fix it, and the next step is a subwoofer crawl, not more EQ.
The 30 Hz kick still reads 6 dB below the 50 Hz kick after the trim. That's the ported box falling off below its tuning, and turning the sub up to chase it would only bring the 50 Hz boom back. For this room, the setting I'd keep is the -3.0 dB trim the kick drums pointed to, which the auto-setup's single pink-noise reading couldn't show.
Improving Bass Response After a Bass Test
If one kick pitch jumps or vanishes in a bass test, suspect the room: room acoustics create standing waves that cancel some pitches and swell others, which makes the sound muddy. If the 30Hz and 20Hz kicks fade, the hardware is the limit: larger drivers and sealed enclosures go lower, and in car audio the enclosure tuning sets the box tuning frequency. If every kick distorts at the same point, a subwoofer simulator or tone generator helps check amplifier output, since amplifiers clip before speaker cones do.
- Rattling: tighten panels and remove objects that pick up vibrations.
- Kicks cutting out: check for loose connections.
Speaker Placement and the Subwoofer Crawl
Good speaker placement matters most. A corner gives bass reinforcement from two walls. For the subwoofer crawl, put the sub at your seat, play a frequency sweep, crawl the floor, place the sub where weak spots vanish, then repeat the bass test.
Crossover and Roll-Off Checks
The table shows where the roll-off starts: 7 dB lost between 30Hz and 20Hz. Its low frequency response ends near 25Hz. At the crossover, 70Hz and 80Hz should match; a dip there means your crossover points need speaker calibration. A bass test with steady sine waves, one sine wave at a time, confirms the frequency response.
Safe Volume for Any Low Frequency Test
Set the 80Hz kick to a comfortable level first, then play the deeper kicks at that same setting and stop if the 30Hz or 20Hz kick brings distortion. Harmonic distortion, low frequency localization and cabinet resonance each get their own subwoofer tests; this subwoofer audio test checks placement, crossover and level. You don't need an ultimate subwoofer test: plain bass tones at a sane sound level show what matters.
Frequently Asked Questions
- What does a subwoofer kick test check?
- It plays the same kick drum at lower and lower pitches so you can hear whether your subwoofer extends your system's depth. On a properly set up system every kick sounds equally loud; only how deep it sounds changes.
- Why play the kicks with and without the subwoofer?
- Running the kicks through your main speakers alone first shows where they run out of depth. With the subwoofer turned on, the deep kicks should fill in without the higher kicks getting louder.
- My deep kicks are louder than the 80 Hz kick. What does that mean?
- The sub level is set too high, so it is working as a bass boost rather than extending the range. Lower the subwoofer level or the receiver's sub trim until the kicks match within about 3 dB.
- Why can't I hear the 20 Hz kick?
- Most speakers, earbuds and laptop speakers cannot reproduce 20 Hz, and many subwoofers roll off just above it. Human hearing is also much less sensitive that low, so you may feel the kick more than hear it.
- How do I tell if my subwoofer is bad?
- Play each kick at a moderate volume. Rattling, buzzing or a kick that cuts out at one pitch points to loose parts, loose connections or a damaged driver; an even drop at the lowest kicks is normal roll-off.
- Can the kick test damage my speakers?
- Deep bass at high volume can. Start at low volume, set a comfortable level on the 80 Hz kick, then play the deeper kicks at that same setting and stop if you hear distortion.
- Does the kick test work for car audio?
- Yes. Play the kicks with the engine off and listen for rattles and for the pitch where the bass is strongest, which is usually close to the enclosure's tuning frequency.