Subwoofer Test — Can Your Sub Really Play 20–80 Hz?
Test your speakers online: left / right channel tones, a 20–200 Hz bass sweep and pink noise — all generated in your browser.
Processed entirely in your browser — nothing you enter here is ever uploaded.
Result
About this tool
This page opens the speaker test focused on the subwoofer range: run the bass sweep and pay attention to the very first seconds, when the tone climbs through 20–80 Hz — the band a subwoofer exists for.
A healthy sub plays evenly through its range: the sweep should rise in pitch without sudden jumps in loudness, dropouts or chuffing from the port. A gap in the middle of the sweep usually points at a crossover set wrong between the sub and the main speakers; a boom at one single note hints at room resonance — try moving the sub away from the corner.
One honest note: your browser outputs plain stereo, so a dedicated LFE channel cannot be addressed directly — the sweep reaches the sub through your system's bass management. The signal itself is synthesized locally and plays through both channels, which is exactly what bass management expects.
Example. The left-channel control plays the selected tone through a stereo panner hard left, and the bass control sweeps from 20 Hz to 200 Hz over 8 seconds.
Limit. The tone frequency is clamped between 100 Hz and 2000 Hz, and the sweep never goes above 200 Hz.