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Originally Posted by ali_rockon22
Let me tell you how good this sub is. On a sub there is a thing known as Xmax which is the measurement of the movement of the cone. On the W7's, the Xmax is 19mm linear. Now the W7 is a very good sub but on the "XXX" the Xmax is 33 mm linear. I think that is quite a difference.
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XmAx is the linear movement of the speaker, and in sound quality xMax isnt what you want to buy on, if you were doing Sound pressure then yeah, Xmax is a great thing. But i think he is going for sound quality.
My personal opinion for making any choices in car audio is to go out and listen to as much stuff as you can. Because for one person an infinity tweeter might be way too much treble, as where the next person might want more.