I recently downgraded from 2 12" L7's off 2kw to 1 L7 powered by a Infinity 611A. The infinity is rated at 657 @ 2ohms rms which is what it was wired to. Its a good amp... pushes the L7 nicely and the clipping indicator is very nice, majorly easy to set the gains... just crank them until the clipping light comes on and then turn it down.... although when you do clip the amp it has a tendency to shut off after a while of playing but i suppose that is to be expected.
Overall this is a great nooby amp... 600+ watts @ 2ohms is moderate power and with the clipping indicator you have to be pretty dumb to blow this amp or any subwoofers hooked up to it.
