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yes. you need to find out what wire is possitive and hook both positives to that and both negatives to the negative. i recomend you disconnect the factory sub
you should be able to access the sub wires from the right side door sill but I don't remember what color the wires are. Do a search and you'll find it. I also recommend removing the factory sub. My aftermarket subs sounded better after I pulled it.
cleansweep are really good. rockford fosgate makes one similar to the cleansweep. i tapped mine from the subwoofer wire and just got a y audio cable to plug into the amp :]