So I have a probox competition 8 sub behind the rear seat, a jl 13 under the rear seat, and all new interior speakers with the basic non nav ford cd radio. Anyways my radio seems to cut out like every 10 or 15 seconds like its trying to process info. The music doesn't stop and it's not whenever the subs are hitting. It just acts like a power drain. I think it's my head unit but not sure. If so give some ideas on what to do. New head unit? If so which one I want everything to work with the sync system like this one does.