You need a wiring harness to hook up the player to your car. If you are trying to hook up Subs then you need to run wires,i dont know why they said you need to run wires to an amp if you're only hooking up the cd player. Go to the installation bay in best buy and ask for a wiring harness. My brother does this for a living and has won bass competions and I have learned everything from him. good luck!