Speaker sounds fine quietly but buzzes when loud

Your speaker sounds normal at low volume, but a buzz or rattle appears when you turn it up. The noise may come from the audio signal, the speaker itself, or something nearby vibrating in sympathy with the sound.

Test at a comfortable level first, then compare tones and channels. TooLab's Speaker Test helps check the left and right channels and play tones. The Speaker Rattle Finder plays a slow bass sweep to help locate rattling.

Test the speaker without pushing it too hard

1. Open the Speaker Test and start with your computer's volume low. Make sure the sound is playing through the speaker you want to check, not headphones or another output.
2. Play the left and right channels separately at a comfortable level. Listen for whether the buzz comes from one speaker, both speakers, or a specific side of a stereo setup.
3. Try the test's tone generator or frequency sweep. Increase the computer volume only a little at a time. Stop if you hear harsh distortion, a loud rattle, or any sign that the speaker is struggling.
4. Play a familiar song or voice clip in another app at the same volume. If the test tones are clean but one song buzzes, the source recording or app may be the cause.
5. If the noise sounds like a vibration, use the Speaker Rattle Finder at a low level. Listen for the point in the slow bass sweep where the noise appears, and check nearby objects as well as the speaker enclosure.

Do not use maximum volume to make the fault easier to hear. A test tone can put steady energy into a speaker, and prolonged loud playback can damage hearing or the speaker.

What the result means

Only one channel buzzes

The problem may be in that speaker, its cable, or the connection feeding it. If the speaker has a removable cable, power it off and reconnect the cable. If practical, swap the left and right connections. If the buzz follows the speaker, suspect that speaker. If it stays on the same channel, inspect the output, cable, or source device.

Both speakers buzz only in one app or with one track

The audio signal may be distorted before it reaches the speakers. A loud recording, an app's volume boost, or an equalizer with boosted bass can push the signal past its clean limit. Try another track and turn off any volume boost or bass enhancement.

The buzz follows a narrow range of bass notes

A narrow, repeatable rattle often comes from a loose grille, panel, stand, desk item, or speaker part vibrating at those frequencies. A speaker can excite nearby objects even when the speaker itself is not damaged. The Rattle Finder can help you identify when the vibration starts, but it cannot identify the exact loose part.

The sound is rough across many tones, even at moderate volume

Persistent rasping, crackling, or obvious distortion across different sources can point to a damaged driver, a failing amplifier, or a bad connection. If the noise remains when you use a different device and a known-good cable, stop using that speaker loudly and check the hardware.

The sound is clean at low volume and breaks up only near the top

The speaker may have reached its clean output limit, or the source may be clipping. Some small speakers cannot play loud bass cleanly. A buzz that starts only at extreme volume does not by itself prove a fault, but it is a reason to turn it down rather than keep testing.

How to fix it

1. Lower the volume and remove bass boosts. Set the speaker and the device volume to moderate levels. Turn off loudness, bass boost, equalizer boosts, or volume-enhancer settings in the music app or speaker software. On a phone, check the audio app and any sound-effects settings, which vary by model.
2. Check the audio output level. On Windows 11, open Settings › System › Sound and select the speaker under Output. Check its volume and, if shown, turn off audio enhancements to compare. On macOS, open System Settings › Sound › Output and select the speaker. Also check the volume inside the app, since app and system levels can interact.
3. Try another source and connection. Play a different recording, then connect the speaker to another computer or phone if possible. For a wired speaker, reseat the audio cable and try another cable or output. For a Bluetooth speaker, disconnect and pair it again.
4. Remove nearby rattling objects. Move cups, loose panels, decorative items, and cables away from the speaker. Put it on a firm, level surface, and check that its grille or stand is secure. Do not press on the cone or insert anything through the grille.
5. Check power and speaker placement. For powered speakers, use the correct power adapter and make sure plugs are secure. Move the speaker a short distance from a wall or shelf and listen again. Placement can change bass levels and make a room or piece of furniture vibrate.
6. Restart and retest. Restart the source device, reopen the audio app, and test again at a moderate level. If the problem started after changing an audio setting, restore the previous setting and compare.

When the speaker may be damaged

A hardware problem is more likely if the same speaker buzzes with different devices, cables, and recordings, while the other speaker stays clean. A torn cone, loose internal part, or failing amplifier can distort at ordinary listening levels. Stop testing loudly if the speaker makes scraping sounds, smells hot, or the noise grows suddenly.

If the speaker is under warranty, contact the seller or manufacturer before opening it. For a replaceable external speaker, compare repair cost with replacement cost. A built-in laptop or phone speaker may need professional service if the distortion persists after software and connection checks.

Why a bass sweep can reveal a rattle

Low notes make speaker cones and nearby surfaces move more than many higher notes do. A loose grille, shelf, screw, or object may vibrate only when the sound reaches its resonant frequency, the pitch that makes it shake most easily. That is why a speaker can seem fine with speech or quiet music but buzz on a particular bass note.

A browser test can help locate a repeatable sound, but it cannot inspect the speaker's internal parts or measure the maximum clean output. Keep the test brief, and let the sound stop as soon as you hear a harsh buzz.