A crackling, buzzing, or static-y speaker is usually fixable at home. The cause is one of seven things — here's how to identify yours.
1. Trapped water (most common)
Even without a known incident, condensation from hot showers or sweat can lodge in the speaker. Run the 165Hz water ejection mode on SpeakerRescue.
2. Dust on the diaphragm
Particles vibrating against the diaphragm cause buzzing. Run the 528Hz dust mode.
3. Volume set too high for the source
A low-quality audio file at max volume causes clipping that sounds like crackling. Reduce volume to 80% and retest.
4. Bluetooth interference
If crackling only happens on Bluetooth, move closer to the speaker, disable Wi-Fi temporarily, and check for nearby microwaves or 2.4GHz devices.
5. App-specific audio bug
Test with a different app (Apple Music, YouTube, Spotify). If only one app crackles, reinstall it.
6. OS audio driver bug
Restart the phone. If that doesn't help, check for OS updates.
7. Torn diaphragm (hardware)
If crackling persists across all apps, all volumes, and after cleaning — the diaphragm is physically damaged. Replacement is the only fix.