that sounds pretty good but i have a tune box that me and a buddy made i need all the room i can get.Its a fiber glass box thats contured to the back fo my cab from side to side all take some pics of and show you guys i also have ddx6019 for a head unit it pounds pretty good it will move peoples mirrors that are in front of me,just to let you know the boston g3 are the same size height wise as a alpine r1s![]()