I have been messing with audio/ video for years ( I am an old man now).. This is my first f150.. They did such a great job (IMO ) with details on these Harley trucks I didn't have anything to fix up.. So I have decided to build a stereo system.. I am going to attempt to build a box for 4 8's in the tiny space under the rear seat, replacing the door speakers with jbl component sets, sound deading... I am hoping there is enough room on the back wall to mount the amps....going to put a lot of power to the 8's to help make up for the lack of airspace...they are 4 ohm svc so I can the amp down to 1 ohm for max power output.. I will post up some pics if I ever finish