Well I purchased my amp and subs about a month ago....just installed a Kenwood ddx6019 (which didnt work so i have to get a new one), but i was gonna put my amp under my passenger seat, but it didnt fit. Now i am looking for a new spot..i built my own box and it fits good....now i just need a spot to mount my amp

maybe the back wall behind my rear seat?? Is it a problem mounting them on the back of a ext. cab?? I also have a rear sliding window??

I have a 2004 f-150 xlt ext. cab?? so if someone has done this, could ya give me some pointers? maybe some pics?? thanks for the help!