Odds are that your devices are wasting more energy and costing you more money than you're aware. A simple tool called a Kill a Watt meter can help find the offenders in your outlets. Eric Mack has ...

I'd like to monitor the amount of power (in watts) going into my speakers. I'm not concerned about over driving them or anything, I'm just curious how much power I'm actually using. I connected a volt ...

If you want to measure voltage you reach for a voltmeter. Current? An ammeter. Resistance? An ohmmeter. But what about measuring AC power? A watt meter? Usually. But if you know what to do, you could ...