Roof radio in a precedent

[bphemi]

I am changing my radio install from in the dash to the roof in a housing so I can add done more speakers. My question is for you guys that have put radios on the roof, where did you run your wires? I want the as out of sight as possible. I have a battery in my dash that I will be getting power from. Also going to probably put an amp in the system so I will be running +, -, rca plugs, remote wire and a second set of rca plugs for a mp3 plug mounted in the dash. Just tring to get ideas of what other people done. Thanks