Most people are fixed in the first three steps.
One side is dead, quiet or uneven
Essential Headphones
Both sides are built into one unit, so there's no swap test.
- Check your balance setting. A slider off center sounds exactly like a broken side.
- iPhone: Settings → Accessibility → Audio & Visual
- Android: Settings → Accessibility → Audio adjustment
- Wipe both sides with a dry cloth.
- Charge fully and reconnect.
- On the aux cable? Push both ends in all the way.
- Try a second device. Still uneven means it's the headphones.
Still uneven? Contact us. Tell us which side.