i have a 4gen prelude. I put 2 mtx amps one being a 4ch and the other being the mono. Ihave the mono hocked up to 2 10' w3. I thought the 6.5 myx seprates would fit in the door but they didnt. I wanted to know what is the biggest size speaker i can go in the front and the back. Im looking to purchase seprates any recommendations?