Cooler is better BUT there are some manufacturers (i.e. Pass Labs) whose equipment run very hot and sound great for decades. If Devialet engineered for high temperatures, then I think we should be okay. 60 degrees Centigrade is very hot and I wonder if the Devialet engineers tested our equipment using your scenario. Ask them.
Synology 713+ -> Aurender N10 -> D 200 -> Legacy Audio Focus SE speakers. ClearAudio Emotion TT. Synergistic Atmosphere Level 3 UEF Speaker and Galileo (USB) Interconnects and Synergistic PowerCell UEF S - Virginia U. S. A.