Strange? class A power amplifier still consumes electricity.

[titanstats]

You may find this post informative.

https://forum.audiogon.com/discussions/any-opinions-on-usher-audio-r1-5-and-6-0

Ah, first thing I thought of was it stays in warm-up state, thanks for the link.

 

[qguy]

I have the same amp, it is forever in "warm up" mode as long as it is plugged and it is designed that way. You can unplugged the amp. In my case, I added a switch on the power cord, so I can just switch it versus pulling the power cord when not it use. It can be biased up to around 50 watts class A per channel but the thing thing gets really hot. I biased mine using the "Nelson Pass" method of measuring the temp of the heat sink, you need to get to a constant 50 degrees celsius on the heatsink to achieved 50 watts Class A. Mine was biased lower when I received it and the sound was not to my liking, after biasing the amp.the sound was a lot smoother. I installed 4 very small CPU fans on top of the amp when in use and put an clear acrylic cover when not in use.