SURE TA2024 only ever draws 2.5W


2013-12-23 5:05 pm
I was curious as to how much power my Sure TA2024 (pictured below) was using at different volumes, so I used a mains power meter to read the power usage in real time. I would have thought that the amplifier would draw less at low volumes and more at high volumes, but what I saw was a constant 2.5W draw. This doesn't sound right to me.

I'm using a laptop switching PSU rated at 12V 5A. Even turning the volume to 50% makes no difference to the power draw.

What's going on?