If its still under guarantee I would take the NAD back. Clearly the fault was present from purchase but you had no way of knowing until you had a sub. You could bring the sub to demonstrate the issue.Purchased a Dynaudio Sub 6 to go along with my Dynaudio XD30 powered speakers.
I can’t get the darn thing to work. I have 1 rca cable plugged in to the top sub port. Crossover set to 80 hz. I have chosen 1 sub from the NAD’s menu. I have the HDMI card that I connect my tv, and it pulls audio from the tv to play on the Dynaudio speakers.
I believe I have the latest firmware on the NAD, 3.18.10.
Any thoughts?
If not you could get the SUB ine output from the NAD measured by an independent "repair" technician and consider if you have any redress under consumer law in USA. Eg in UK the relevant consumer act states that goods should be " fit for the purpose it was designed and sold".
So many are bypassing the issue by workarounds yet others allegedly don't have a problem, perhaps because the input impedance on their sub is lower and the paltry output from the Nad combined with volume controls on the sub are sufficient to keep it from switching off.
NAD are content to keep selling and have not addressed the issue once they have our money. If more dealers were sending units back perhaps it would be different?