The RMS ratings have nothing, I mean nothing, to do with anything in this thread. At all. Period. Seriously. Don't mention it again... That is a good deal for a W7 if all works out like it should. They are very well engineered drivers and are very good performing. If there is any shady parts, I would walk away. There is nothing wrong with buying a used a sub, you just have to be sure you know what you are looking at. BTW, the RMS ratings have nothing to do with anything.