This got me looking at energy usage. I was surprised an electric car uses about 345 watts per mile. I though this low. If you drive 10,000 miles a year, that is 3,250,000 watts.
A 300 watt dissipating class A amp on 24 x 365 is 2,628,000
An HVAC is about 3500 watts per hour. In a warm state that is about 10 hours run time per day for say 182 days. Thats about 6,370,000 watts. That is assuming the home is about 2400 feet.
Heating a cooling is the mass power usage. Most homes I see in warmer states have more than 1 AC. They have 2 to 5. So the load is more like 12 to 18 million watts for summer. That does not include heat or cool in the winter.
At $1kW, that is $2,628 to idle an amp.
At $.12kW as is much of the US, that is $315. Thats $26 a month. Most audiophile have money enough to let their system run for $26 a month.
For perspective, your desktop computer uses at least 200 Watts per hour. I leave mine on 24 x 365. That is 1,752,000 watts. I bet your Taiko uses more than 200. I bet your DAC is also 200. We leave those on 24x365. Why pick on the amp when you digital front end is probably using close to twice what a class A amp uses. And about the same as what your home computer uses.