AC_Hacker,
I use an epeat gold laptop now (Elitebook 8560w) and do some pretty heavy CAD/CAM and electronic design. It wasn't cheap but I love it and don't miss the main frame computers I used before it. Running it uses about 22 watts.
My speakers are from Dynaudio and they're 4 ohms so they require power to sound good. I'm still debating an amp for them. The class 'D',s are efficient amps but I just don't like the sound at all.
When I need to conserve power I use headphones. I designed a capacitor amp for Elektor Magazine but it didn't seem to take off. I guess you have to be power conservers like us to appreciate it. It charges in 30 seconds and runs over an hour.
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