Yeah, Computer Engineering sucks, thats why I havent been on here in sooo long. But, it's the holiday season and I'm ready to replace my Adire Tempest

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Now, here's what I need. Something to go into a 3.4 cuft sealed box, 15" subwoofer that is made to handle 500-600wrms at 4ohms. I was looking at
this but before I buy that sub, I want to know if its the same as the Tempest, or if anyone has a better idea, or if anyone can find me another Tempest.
Thanks friends