On Wednesday, 1 November 2017 19:25:17 UTC, wrote:
On Wednesday, November 1, 2017 at 1:58:11 PM UTC-5, Seymore4Head wrote:
Does a clock radio use more power in the aux mode than off mode?

I listen to my phone over the stereo speakers from my clock. If I
just unplug the phone and leave the radio in aux mode will it use more
power?

Possibly, it depends on how power-conscious the designer was. The amplifier may power down with no input signal. One clue may be to put your ear to the speakers, with no input signal, and listen for amplifier white noise. Turn the volume way up.

It may not apply to your radio, but there are very strict efficiency requirements on most modern appliances. Even wall-warts (a major source of wasted energy) are now required to limit quiescent current (no load) to mere microamps.

Most?, Washing machines & dishwashers yes, what else?
Wallwarts & TVs have quiescent power limits, but I don't remember any efficiency requirement.


NT