Doug Dropped off his boat last week and we installed a system that included (2) Arc Audio KAR 600.4s, (1) Arc Audio KAR 900.1, an Arc Audio XEQ EQ, and (1) Arc Audio 12" Sub. The sub was mounted in a 1 cubic foot box under the drivers console behind the stock kick panel, and the custom amp rack was made in place of the cargo net under the passenger side. For the tower Doug went with the Fusions, which have a Diamond Audio 6.5" Component set and a 5.25" coaxial set. The one 600.4 running the tower has enough power to upgrade later for another set of Fusions.