Is there any danger in leaving a class D amp on unattended for ten days?

I would not leave electronics ’on’ unattended without power condtioning. Who knows what might happen if the power goes out. High frequecy noise spikes could damage your system becaue it is digital not unlike a computer. A legacy power amp would be less susceptible. It is not worth the risk of component failure burning your place to the ground which could happen
   My recommendation? Turn on the system 15 minutes before listening and have a cup of tea or coffee. Relax.