Bass sweep, 20 Hz to 200 Hz
A slow sweep through the subwoofer and bass range, where rooms and enclosures cause the most trouble.
Volume first. Turn your device volume down before pressing play, then raise it slowly. Tones start quiet on purpose. Very low tones can damage small speakers and woofers if pushed hard. Stop if you hear rattling, distortion or cone slap.
The WAV is rendered on your device at 48 kHz, 16-bit stereo, using the settings above, so you can play it from a USB stick, a TV or measurement software.
What to listen for
Listen for swells (room modes), buzzes (loose panels, cabinet doors) and the point where your speakers fade out. Compare the swells with the room mode calculator.
Every other range, including custom start and end points and presets, is on the main frequency sweep generator.
Other sweeps
Questions people ask
How long does each octave take in this sweep?
This sweep covers 3.3 octaves. With the default 25-second logarithmic setting, each octave takes about 7.5 seconds. In linear mode the top octave would take half the total time.
Can I download this sweep?
Yes. Press "Download WAV" to render it on your device as a 48 kHz, 16-bit stereo file, using whatever duration, waveform, level and channel you have set.
Keep testing
- Frequency sweepLogarithmic or linear sweeps over any range and duration.
- Spectrum analyzerReal-time FFT of your microphone with peak hold and note readout.
- Room mode calculatorPredict booming bass notes from your room size.