Warning: Start at low volume! Very low frequencies can damage speakers if played too loud. Laptop speakers cannot reproduce these frequencies properly.
60-Second Frequency Sweep
Sweeps from 150Hz down to 1Hz over 60 seconds
The same 60-second exponential sweep, mono, at -6 dBFS with 50 ms fades. Play it from a phone or media player when the sub is not near this computer.
Individual Test Tones
Test specific frequencies to identify your subwoofer's response characteristics
Sine, mono, 16-bit 44.1 kHz WAV or 192 kbps MP3 at -6 dBFS with 20 ms fades.
How to Use
- Set your volume to a LOW level
- Click "Start Sweep" to begin the 60-second test
- Listen for when the bass becomes inaudible
- Note the frequency where it drops off
- Use individual tones to test specific frequencies
- Compare results with your subwoofer's specs
What to Listen For
- • Roll-off point: Where bass becomes weak
- • Distortion: Rattling or buzzing sounds
- • Port noise: Chuffing from bass ports
- • Room modes: Peaks and dips in response
- • Clean output: Smooth, controlled bass
Frequency Guide
- • 100-80 Hz: Upper bass, kick drums
- • 80-60 Hz: Bass guitar fundamentals
- • 60-40 Hz: Deep bass, movie effects
- • 40-20 Hz: Sub-bass, felt more than heard
- • Below 20 Hz: Infrasonic, mostly felt
Important Notes
- • Laptop speakers: Cannot reproduce low frequencies
- • Headphones: Limited bass extension
- • Room acoustics: Greatly affect bass response
- • Volume: Start low to avoid damage
- • Subwoofer placement: Affects performance
Go further
Need the full 20 Hz - 20 kHz range, or a sweep with a custom start, end and duration? Use the frequency sweep generator. To find the room modes that make one bass note boom and another vanish, try the room mode calculator, and download calibrated bass tones from the test tone pack. Where these frequencies sit against everything else: the audio frequency chart.