Question 1

How do I test if my left and right speakers are wired correctly?

Accepted Answer

Click the Left button — you should only hear sound from the left speaker or earbud. Then click Right — sound should switch to the right side. If the sides are reversed, your cables or headset orientation need swapping.

Question 2

Why can I hear the test tone from both sides?

Accepted Answer

If a Left-only or Right-only test plays on both sides, your device may have mono audio enabled in OS accessibility settings, or your source file is summed to mono. Disable mono audio in Windows, macOS, iOS or Android sound settings and try again.

Question 3

What frequency should I use for a speaker test?

Accepted Answer

440 Hz (A4) is a good mid-range reference most speakers reproduce cleanly. For woofer or tweeter checks, sweep between 60 Hz (bass) and 8 kHz (treble). This tool lets you pick any frequency from 20 Hz to 20 kHz.

Question 4

Does this speaker test work on phones and Bluetooth headphones?

Accepted Answer

Yes. The tool uses the Web Audio API built into every modern browser, so it works on iPhone, Android, Windows, macOS and Linux with wired, USB and Bluetooth headsets — no app required.