Massive bass upgrade from the Polk 12” to a pair of ported JL Audio 12W6s. Downside to big bass in the storage cubby in any boat is the bass is trapped inside with the seat down. We solved this years ago with custom grills allowing the bass to escape. They are just easier to do with the cnc and we can add etching to the faces. Only way to get the most bass we’ve ever done in a Nautique was to build a 3 piece box that was assembled in the boat as it didn’t fit otherwise. To say it crushes is an u