i just got a pioneer car radio and the output was bad but it is a nice radio and everything else works . the output ic is a pal007a , i had a pal005a and all the pins mached up so i gave it a shot and it atually worked . but now im wondering what the difference between the 2 are ? there is also a pal006a they put in these . i cant find any specs on any of them and the 007a is kinda hard to find (other than from pioneer) but the 005a and the 006a are everywere and cheap . like i said the radio works now i am just wondering what the difference is because if 1 of the others would sound better i would invest in it .