I know a kid that has a pair of those..
They are crap, can not take nearly 600rms. He hooked them up to a kicker 1200.1, (someone told him you only needed a good amp and it would make the speakers good). So when he turned the volume past about 10 on his HU, they would distort like crazy. And the gain was tuned right and everything, he had them installed professionally.
So in the end he SOLD the 1200.1 (idiot), and bought an 800.2, and they could take the 400 each but still didnt sound good... They are crap though, and he is an idiot