NAD-KB19-402
The first step to troubleshooting an AV distortion issues is to check your cabling. NAD Electronics officially recommends using Premium HDMI Certified cabling to resolve any HDMI or Audio Return Channel issues.
Trust the Cable with the Label
If after replacing your HDMI cables with Orange labeled QR Coded HDMI cables, you are still experiencing ARC issues, please review the following support article: