Blown Speaker Test: Is Your Speaker Damaged?

How to test for a blown speaker

1. Set volume to around 30%, then run the sweep above. Increase to 60–70% and run it again.
2. A healthy speaker produces a clean, smooth tone the whole way.
3. Listen for buzzing, fuzzy crackle, rattling or “paper flapping”. Press Hold frequency to stay on a bad spot.
4. Compare left and right with the speaker test. If one side is distorted and the other is clean, the distorted side is the problem.

Blown speaker symptoms

• Distortion or crackling even at low volume.
• No bass at all, or bass that sounds “farty” and loose.
• A buzzing noise that follows the music’s rhythm.
• Complete silence from one speaker while the other works (fully blown voice coil).

Blown vs. dirty vs. wet: how to tell

Symptom	Likely cause	What to do
Muffled, quiet, “underwater” sound after rain or a spill	Water in the grille	Water eject sound, then air-dry
Gradually duller sound over months; visible lint	Dust or pocket lint	Dust cleaner + soft brush
Rattle at one specific frequency only	Loose screw, grille or object	Tighten and remove nearby items
Crackle at all frequencies, even quietly	Torn cone or damaged voice coil	Replace the speaker
Crackle only on some apps	Software or Bluetooth issue	Restart, update, re-pair

Can you fix a blown speaker?

Small tears in a paper or foam surround can sometimes be repaired with speaker repair glue or a re-foam kit. A damaged voice coil cannot be fixed at home — the driver must be replaced. For phones, the bottom speaker module is usually an inexpensive part that a repair shop can swap in under an hour. Before you pay for repairs, rule out water and dust: our phone speaker crackling guide covers the common, fixable causes.

Frequently asked questions

How do I know if my phone speaker is blown?

Play the sweep at low volume. If it crackles or buzzes the whole way, even quietly, the speaker is likely damaged. If it is only muffled, it is more likely water or dust.

Can water blow a speaker?

Water usually just muffles the sound temporarily. Playing at maximum volume for a long time while soaked, or corrosion over days, can damage it, so eject the water soon.

Does a blown speaker get worse?

Usually yes. Playing loud music through a torn cone can enlarge the damage, so lower the volume until it is repaired.

Related free tools

• Bass & Subwoofer Test
• Frequency Sweep Test
• Speaker Test (Left/Right)
• Water Eject Sound
• Speaker Dust Cleaner