I use Nord-assembled 4-channel amps for my main system, which requires 8 channels for a pair of Linkwitz LX521.4. I bought the first of these two amps in Jan. 2020 for a pair of LXmini. They use the OEM NC252MP modules from Hypex.
One 2-channel module within that amp has now failed. The other works fine, so it's not a Nord problem, but a module problem. I don't recall having any amp fail since I started buying separates in the 1980's (various yamaha, adcom, ATI, museatex (obscure, I know), Meridian, Parasound), though some have been noticeably better than the others as far as noise goes. To have an amp module fail less than 2 years out is disheartening. I don't worry about the warranty issue, and in fact I don't mind installing a replacement module myself instead of shipping the whole amp back to England for Nord to do it, but this does worry me about these convenient, high-performing class-D modules generally.
ps
One 2-channel module within that amp has now failed. The other works fine, so it's not a Nord problem, but a module problem. I don't recall having any amp fail since I started buying separates in the 1980's (various yamaha, adcom, ATI, museatex (obscure, I know), Meridian, Parasound), though some have been noticeably better than the others as far as noise goes. To have an amp module fail less than 2 years out is disheartening. I don't worry about the warranty issue, and in fact I don't mind installing a replacement module myself instead of shipping the whole amp back to England for Nord to do it, but this does worry me about these convenient, high-performing class-D modules generally.
ps