If you’re having trouble with audio distortion or dropouts on your Z407 speakers, try these suggestions:

Bluetooth

• Move the audio source closer — it might be out of the range of your speakers.
• Move the other sources of wireless signal away — you could be experiencing interference.
• Adjust the volume on both the audio source and your speakers.
• Restart both your speakers and the audio source.
• Try unpairing and repairing your source device and speakers.

3.5mm Auxiliary

• Check that the cables are securely connected to both the speakers and the source device.
• Adjust the volume to mid-level (50%) on the audio source.
• Try a different source device to ensure the issue isn’t the device.
• Try a different 3.5mm or USB cable. Make sure that you are using a 3-pole male to male 3.5mm AUX cable.

USB

• Check that the cables are securely connected to both the speakers and the source device.
• Adjust the volume on both the audio source and your speakers.
• Try a different source device to ensure the issue isn’t the device.
• Try a different USB cable.

NOTE: If you’re streaming audio content from the internet, the issue could be with the internet connection and not your speakers.