Why your Bluetooth speaker keeps cutting out

In order of likelihood: distance or an obstruction between phone and speaker; interference from congested 2.4 GHz Wi-Fi or a nearby microwave; a stale pairing that needs clearing; a low battery on either device; and rarely, a codec or firmware problem. Work down the list in that order rather than trying everything.

Most troubleshooting guides list twenty possible causes with no indication of which are common, which means you try the rare fixes first and get frustrated. In practice two causes account for the large majority of dropouts, and both are fixable in under a minute.

1. Distance and obstruction — the usual answer

Bluetooth's quoted range assumes clear line of sight. In a real house, walls, appliances and — the one people miss — your own body all attenuate the signal considerably. A phone in a back pocket with the speaker across the room is a genuinely difficult path, because the human body is largely water and water absorbs 2.4 GHz efficiently.

• Move the phone so there is a clear line to the speaker; taking it out of a pocket is often enough on its own.
• Close the distance, especially through walls — one wall costs far more than several feet of open air.
• Avoid putting the speaker inside metal: a cooler, a car footwell, a metal shelving unit.
• If you are using two paired speakers, remember the link between them is shorter-range than the phone connection.

2. 2.4 GHz interference — the second most common

Bluetooth shares the 2.4 GHz band with Wi-Fi, microwaves, cordless phones and a lot of smart-home hardware. In an apartment with several neighboring networks, the band is genuinely crowded and dropouts become intermittent and hard to reproduce — which is exactly what makes them frustrating.

1. Move away from the Wi-Fi router — being right beside it is worse than being across the room.
2. If your router is dual-band, put your phone on the 5 GHz network. This frees the 2.4 GHz band for Bluetooth and is frequently a complete fix.
3. Note whether dropouts coincide with the microwave running. If so, that is your answer.
4. Outdoors at an event with many devices, expect degradation and move the phone closer.

3. A stale pairing

Pairings accumulate. A speaker that remembers six devices may keep trying to reconnect to a laptop in the next room while you are using your phone, which presents as random dropouts. Clearing everything and starting fresh resolves a surprising share of persistent problems.

1. On the phone, choose Forget This Device for the speaker.
2. Reset the speaker's pairing list — usually holding the Bluetooth button for several seconds, or a power-plus-volume combination. Check the manual for yours.
3. Turn off Bluetooth on every other device in the house that knows the speaker.
4. Pair the phone to the speaker again as the only device in range.

4. Low battery on either device

• Charge both devices fully and test again before investigating anything else.
• Turn off the phone's battery-saver mode, which commonly restricts background radio activity.
• If the speaker only drops out below a certain charge level, that is the cause and the fix is charging habits.

5. Codec and firmware — rarely the problem

• Update the speaker's firmware through the manufacturer's app if one exists. Connection-stability fixes are among the most common firmware updates in this category.
• Update the phone's OS, which occasionally ships Bluetooth stack fixes.
• On Android, Developer options let you force a different codec — switching from a high-bitrate codec to SBC trades some quality for markedly better stability in congested environments.
• Disable Bluetooth audio sharing or dual audio if you enabled it, since splitting the stream doubles the demand on the connection.

Quick diagnosis

If none of this resolves it and the speaker is several years old, the likeliest explanation is age — see how long Bluetooth speakers last for what typically fails and when. If the speaker is simply not loud enough rather than cutting out, how to make it louder is the page you want.