I've got some M-Audio AV40s at home, plugged into a power strip that includes a mac mini and an LCD monitor. If I plug the power strip into a power meter (like a kill-a-watt, except I live in NZ so I have a different brand that can handle 240V), I might observe the following:
- Speakers off: 20W
- Speakers on: 15W
Why does turning the speakers on save me five watts?
The meter also records the power factor as 100 in the first case and 95 in the second, but I don't know what that means.