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Subwoofer Test
Low-frequency sweep for subwoofer checks — start quiet.
Low-frequency sweep — start quiet. Cannot measure physical speaker performance. Audio processed locally; nothing uploaded.
Sweeps 20 Hz → 120 Hz over 10 seconds (exponential ramp).
Ready
What to listen for
Rumbles should be smooth without rattling. Gaps or dropouts may indicate crossover settings, phase issues, or room nulls.
Limitations
Browser playback depends on your DAC, amp, and sub. This is not a replacement for REW or calibrated SPL measurement.
Safety
Extended high-volume bass can damage hearing and drivers. Use short sweeps at moderate level.
How to use
Adjust settings
Use sliders and controls to set frequency, volume, and waveform. Changes apply in real time.
Export or share
Download a WAV file or copy a share link. All processing stays on your device.
Frequently asked questions
Can this measure subwoofer output?
No. It plays a sweep only — not a calibrated measurement.