That's a really good question. It's important though, before you start comparing amp power ratings, that you don't compare apples to oranges. There's two different kinds of power ratings out there: peak power and RMS power. Peak power is what the amp can produce for a very limited burst of power. It's often the number you'll see on the box but it's not very useful. It's better to look at RMS ratings. RMS power is the measure of the amp's continuous power output. It's much better to look at the RMS numbers when you're shopping. And if you really want to be sure about an amp's power rating, compare amps that have a CEA-2006 power rating. Now, this standard establishes specific guidelines for how the amp's power is measured. So amps with this kind of power rating have all been measured on a level playing field. But once you're aware of all this you still need to figure out just how much power you need to drive your speakers. The first thing to remember is that it's better to have more power!! ... View more