ok i have a 2003 f150 and have modded the dash board and i have 2 class c comp kickers a prime 250 amp and a double din dvd player and every thing works fine except for one there is only 1 sub out cord and i have 2 comming from the amp so i bought a Y cable and i cant find any where that says "sub on" or any sub options i cant find them any where it is one of those double din dvd players off ebay but it does work great but the maunel is crap dont really explain anything any help would be awsome!!!!!!!