i have read a lot of people say that they can take a good clean 800 watts without a problem. you just have to set the gains right. the sub will most likely never see the full 800 watts for more than a fraction of a second at a time.A single RSD sealed with 800watts? That's way too much for a single RSD. I would look more towards an Alpine Type-X. It would be difficult for me to choose much else over it as long as you have about 2.5 cubes for it.