SURE TA2024 only ever draws 2.5W

[Twerp]

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?

[IMGDEAD]http://img.weiku.com/IMG_1//0000/501/1362_15W_Class_D_Audio_Amplifier_TA2024C__s.jpg[/IMGDEAD]

 

[wwenze]

Because that 2.5W is all quiscent power draw.

Remember that 1W is enough to drive a 88dB/W @ 1m to... er... 88dB, which is what many consider unsafely loud.

 

[Twerp]

Because that 2.5W is all quiscent power draw.

Remember that 1W is enough to drive a 88dB/W @ 1m to... er... 88dB, which is what many consider unsafely loud.

That makes sense, thanks. It's amazing how efficient these amplifiers are. So, in theory, a 1 amp adapter should be more than ample.

 

[Twerp]

I just tried playing St Anger by Metallica (notorious for being one of the most brick-walled albums ever!) and the power meter edged up to 3W when the shredding kicked in and approaching 50% volume.

All is well!