I currently have a pioneer reciever and two blaupunkt 6.5 3 ways(160w max) in the door and im getting 2 more 6x9's 3ways(240w max) for the back deck and then one 10 in the trunk. The reciever is 50x4 but i want some more power for the 6x9's and for the 10, i dont think i need to substantial of...