On the water this weekend I realized that the four cabin speakers in the boat are wired to separate zones, and they're completely non-intuitive. Zone 1 is the left front and right rear, and Zone 2 is the left rear and right front plus Tower speakers. I think the crossover is a mistake, but I would love to have a better division - Like all four cabin speakers on Zone one, and the tower on Zone 2. After looking at the manual for the radio, it doesn't seem like you can get all four channels powered by the head unit on the same zone. Am I interpreting this correctly? Looks like it's time for an amp!

Does anyone know what these Factory speakers are?