Should Class A Amps be left on??

I am an Aleph user and the class A operation on the 5 uses 300 watts, that's a lot of heat/electricity, when turned on regardless of whether there is program material.

The Aleph 5 seems to take 1 hour to warm up and become most musical and fluid, so I turn it on when I plan to listen and turn it off when not in use for longer than 6 hours. The heating and cooling cycles are no different than leaving it on continuously 24/7 I assume and quite likely better than frying forever.

As the Pass website says the aleph series like like the sun will burn brightly and when it is finished it is all over!

Enjoy...

Nelson Pass expects 20 years or so from the Alephs because they "run hard". As energy consumption is also importantly an issue, I too try to flip my 30 amp switch on my ACME cry0-outleted junction box with my toe about an hour or two before listening...or listen to FM background before CD.
I'm hoping that this 10-15% on-time leverages my Aleph MTBF to at least 25 years (I'll be 75). We'll see....
Sometimes I think it takes mybe 2-3 hours for the Aleph 2 monos (300w idle each) to get liquid and VERY resolving.
But it could be my (our) hearing apparatus acclimating to the listening environment, like occurs at a live concert.
Yeah, I guess I could afford to leave them on 24/7, especially in the winter, but I'd still feel like they'd age due to thermal load. I have them each sitting in holey
plastic 1 ft-cube milk cartons, hanging a foot under the basement floor joists, so they get convection cooling from UNDERNEITH, too. Hope it helps....

Many thanks to all the respondents of this thread. I have found this one draws 1 amp and 120 Watts at idle. According to the manufacturer,(I just found out)Can be turned on and off as well as left on constantly. If possible keep turned on. If going on vacation or away for a period of time turn the system off.

Leave them on and make sure that they have adequate airflow. Sean
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Based upon advice here and from other sources. The amp has been on for a solid ten days now. There is no comparision between turning off and leaving on. Clearly Class A amps,whose output operates in Class A definitely sound better being left on. This amp has really come into its own now and is quite impressive to say the least.