the new ones aren't over rated and there not sluggish on power. but there is more to it then just hooking a dmm up to it and saying a amp is over rated. if you have the right equipment to mesurre voltage, amprage, and resistance you can find the power you are getting from any amp, on the voltage it sees from the batteries when it plays. I can name a few amps that I have personaly done tests on and people will disagree with me on about there power so I won't mession those amps, but believe me man it will do its rated power.