No audio, low audio or poor audio quality from a streaming audio source/application
Make sure the streaming audio source is on and playing
Turn the volume of the headphones all the way up
Make sure the audio device supports A2DP audio streaming
Try another streaming audio source/application or try another track
Make sure the device’s Bluetooth volume is turned up and not muted
Move the device closer to the headphones (33 feet or 10 m)
Move the device and headphones away from any device that could cause interference, such as another Bluetooth device, cordless phones, a microwave oven, or a wireless computer network router
Reduce the number of applications that are running on your device. Disabling Wi-Fi functionality on the device may also improve audio quality
No audio or poor audio quality from a connected device
If using a Bluetooth device, ensure that the control module is firmly connected to the headphones
If using the 3.5 mm audio cable, ensure both ends of the audio cable are firmly seated
Try another music application or try another track