I am planning to add some 6x9's under the engine hatch so we can hear the highs on the outside of the boat. I currently have 2 12 w 6's and 3 sets of MB quartz marine 6.5's. I have plenty of bass and the system is real loud when in the boat but the highs need some help when your not in the boat.
I have a older kenwood amp that has 400 watts and has it's own cooling fan built into it. It blew two fosgate 10's so I'd assume it would be good for 4 6x9's. What do you think audio guy's???