I decided to hook it to a power meter and sadly it reported 22.5 W standby and 23.1 W on so I don't think I'll be leaving mine on all the time regardless of the answer. I'll probably leave it on for a few hours before I listen to them.
Just so you know, 22-23W is not very much -- draws only .2 amps. To compare, a Schiit Gungnir consumes 20w; a Schitt Yggy consumes 25w; and a Audio GD NOS 7 consumes 48w. basically, it's slightly more than leaving a 20w light bulb (think candelabra bulb) on all of the time.
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