Check the Edge NQ is properly connected to your amplifier
Check that appropriate input has been selected on your amplifier
Check that your speakers are properly connected to your amplifier
Make sure the Edge NQ is not in mute mode
If possible, use different interconnect cables between the Edge NQ and your amplifier
Check the Edge NQ in a different input on your amplifier If streaming wirelessly from an app to the Edge NQ. Ensure the volume is not muted within the app.
Check the Edge NQ in a different input on your amplifier