There seems to be a lot of talk about the pitfalls of using a high-power cabinet with a low-power head. I don't remember when this dicussion came to be, but I'm still not sure I really understand the details. Just because a cabinet can handle 400 watts does not mean it needs 400 watts to work. Isn't the sensitivity rating the more important? For instance, the Ampeg SVT-412 is rated for 400 watts, and has a sensitivity of 98 db. On the other hand, the Aguilar GS-212 is rated for 600 watts and has a sensitivity of 103 db. That says to me that the Aguilar needs less power to drive it, and also handles more power. So what am I missing?