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The only sub/amp combo I thought was ever worth a penny was the Infinity Basslink. Other than that, you'll get MUCH better performance by doing a seperate amp and subwoofer. If you blow the sub, then you can easily get another one to replace it. If you ever want to upgrade one component, then you can. Also you can mount the amp in places that an integrated unit would never see like under the jump seat, under the front seats, under the rear seats, or behind the rear seats which is a theft deterance.