I'm thinking about upgrade subs I have audiobahn 15in right now and I'm think about getting an alpine x 12 or 10 will that be even an upgrade? What is everyones opinion on them I haven't heard to many people talking about them. I'm looking for a clean but loud hitting sub. More clean then loud any input on the type x or another sub besides w7. I'm working on aboout 700 as the price range for the sub and box