I am not sure what to do and could use the advice of this sage group.

Just bought Sonos a week ago. Was switching between Sonos input and photo input to test sound quality. I noticed that whatever input I chose, the Sonos input player through the amp. Strange, so I paused the digital Sonos stream.

When I went back to play the Sonos stream after the phono, my amp (NAD model C372, 1-2 years old?) started cutting out, power light changed from green to red. I thought I had volume too high (1/2 power), turned it down, powered off and then on again. Played a fraction of a second, then same problem. Repeated several times, then noticed SMOKE coming out of rear of amp!! Now will not play from any source.

What could cause a fairly new, good quality amp like that to blow up? Should I try and return the amp, even though I probably could not find receipt. If so, to retailer or contact manufacturer rep? What are chances that the Sonos unit could have done this, if it is defective? Isn't "soft clipping" on NAD meant to stop harm even if source electronics have a problem?

I certainly do not want to place a component (say, amp) only to have it burn up again if, say, Sonos is the problem.

ANY ADVICE would be GREATLY APPRECIATED.