The Ayre CODEX DAC runs warm and, I agree with @drrsutliff above, the CODEX DAC should on 24/7. Th Codex DAC sounds best when on 24/7. Please place the CODEX in a space so that it gets plenty of air and does not over heat. It is a great sounding DAC. Enjoy.
Codex 24/7
I just bought a used Codex I plan to use for playing Roon files. It seems to run pretty warm, and doesn't seen to have a standby mode. Do folks leave it running 24/7?