Anyone able to identify the brand of this subwoofer? Cone cap on it and I have no idea. Guy said it was a 4000w. Another buddy said that he thought he knew but wasn't sure. The 2400.1 d Zues bangs the shit outta it but my question is before I upgrade to a bigger amp I would like to know exactly what its rated at. It bangs in my mountianeer! I'm wanting to get at least 1 more them or 3. Gotta start somewhere aye.