Speaker Test Tones
Use our free online audio tools to test your speakers, headphones, and subwoofer. Check stereo separation, frequency response, and polarity.
Left / Right Stereo Test
Click buttons to verify your speakers are placed correctly.
High Frequency Limit Test
Most basic speakers stop at 15kHz. High-end equipment goes up to 20kHz.
How good is your gear? (And your ears?)
Can't hear what you expect?
If you can't hear high frequencies, it might be your speakers limitations, OR it could be natural hearing loss.
Speaker Polarity Test
Check if your speakers are in phase. "In Phase" should sound focused in the center with strong bass. "Out of Phase" sounds wide, hollow, and lacks bass.
Sine Wave Generator
Generate pure sine waves to test specific frequencies. Standard test tone is 440Hz (A4) or 1000Hz.
Frequency Sweep Test
Sweeps from 20Hz (Bass) to 20kHz (Treble) over 10 seconds. Use this to check subwoofer crossover and tweeter response.
Noise Generator
Play standard noise colors for burn-in or audio system testing.
How to Use the Speaker Test Online
1. Check Left & Right Channels
Use the Stereo Test to identify if your speakers are wired correctly. When you click "Left", sound should only come from your left speaker/earbud. If you hear it from the right (or both), your wiring or settings may be incorrect.
2. Test Frequency Response
The Frequency Sweep plays a tone starting from deep bass (20Hz) rising to high treble (20kHz). This helps you find:
- Bass limit: When do you start hearing the rumble?
- Resonance: Does your room or speaker cabinet buzz at certain frequencies?
- Treble limit: When does the sound disappear? (Check our Hearing Test to see if it's your ears!)
3. Speaker Polarity & Phase
While this tool primarily tests channels and tones, ensuring your speakers are "in phase" is crucial. If the bass sounds weak or "hollow" when playing music, your speakers might be out of phase (one pushing while the other pulls). Use the Test Tones to play a steady low frequency (e.g., 100Hz) and move your head side-to-side to check for consistent bass.
4. White vs. Pink Noise
White Noise has equal energy per frequency (sounds hissy, like static). Pink Noise has equal energy per octave (sounds deeper, like a waterfall). Pink noise is often used by audio engineers to calibrate sound systems because it closely matches how human ears perceive loudness.
Just bought new audio gear? Follow our comprehensive 6-step technical audit to check for defects, phase issues, and frequency response.
Frequently Asked Questions
How do I test if my speakers are working properly?
Use our free online speaker test tool above. Start with the Left / Right Stereo Test to verify that sound is coming from the correct speaker. Then, run the Frequency Sweep Test to ensure your speakers can reproduce both deep bass and high treble without distortion or rattling.
How do I know if my speakers are out of phase?
Use the Speaker Polarity Test section. Play the "In Phase" signal—it should sound focused in the center with strong bass. Then play "Out of Phase"—it should sound wide, hollow, and lack bass. If "In Phase" sounds hollow instead, your speaker wires might be reversed (positive connected to negative) on one side.
Why does the wave disappear in "Out of Phase" mode?
This is normal! The visualizer shows the combined signal of left and right channels. In "Out of Phase" mode, the signals are mathematically opposite (+1 and -1) and cancel each other out to zero on the graph. However, since your speakers are physically separated, the sound waves don't fully cancel in the air, so you still hear the sound (though it may sound "thin").
Can I use this tool to test headphones?
Yes! This tool is optimized for both speakers and headphones. The Left/Right stereo check is particularly useful for verifying you are wearing your headphones correctly (L is on the left ear, R is on the right).
What should I hear during the frequency sweep?
You should hear a continuous tone smoothly rising in pitch from low (bass) to high (treble). If the sound suddenly disappears or gets much quieter at certain frequencies, your equipment may have a frequency response "dip." If you hear buzzing or rattling, it indicates a resonance issue in your speakers or the room.
What is the difference between White Noise and Pink Noise?
White Noise sounds like harsh radio static because it has equal energy at every frequency. Pink Noise sounds deeper and softer (like heavy rain) because it has equal energy per octave. Audio engineers often use Pink Noise to tune sound systems because it closely matches how the human ear perceives loudness across the frequency spectrum.