I bought a hifonics zeus 4400, 4 channel amp to power 4 infinity kappa 6 1/2. This four speaker setup is for existing cutouts in the boat. The speaker location is fine for when I am in the boat but when I am in the water I cant hear them very well. I want to add two enclosed 6x9's that I can hang from my bimini and direct toward the rear of the boat for when I am skiing and hanging out in the water. Can I connect all six speakers? What options do I have? I would also like to add a bazooka sub that has a built in amp. I would like to run only the sub and the 4 infinitys while in the boat and to only run the 6 x 9's with the sub while out of the boat. I am open for other suggestions as well. Please help!