cd skipping
 

Hey, I just got another 12 put in my 03 X5 and it skips a lot. even when i turn it down it still skips and i know it's not the cd because i just made a brand new one and still dose it. i was wondering if i could do something about it with out having to buy a new head unit. I have 2 jl 12w6v2 and 2 jl 500/1 in a ported box. or could it be because i dont have enough power to it?

help appreciated