This would be a horrible injustice to the MC452! The Sonos streams ordinary non HD music as a SOURCE component not as a linestage preamp. Most digital sources are not good volume controls for a amplifier like the MC452. You need a proper volume control to make the most of the MC452 and the signal better be a very musical, clean, and clear! Also, I would not trust this device to run my LAWNMOWER! Just because it has a analogue output dose not mean the impedance is going to be a proper match ( i cant find any specs even from users manual). For that reason alone Id be out!
Matt M
Matt M