Think you might want to reconsider and just contact NAD, so far 3 different responses and likely more to come
https://support.nadelectronics.com/hc/en-us/articles/360000158868-Welcome-to-the-NAD-Help-Centre
https://support.nadelectronics.com/hc/en-us/articles/360000158868-Welcome-to-the-NAD-Help-Centre