How to connect my iPhone to my amp? - 1

I have a Alpine MRP-M650 V-Power in my truck and I would love to hook up my music to it and I just don't know what all I need to do in order to do so? And of course I would really like to keep all expense low.

The best way is through the head unit directly. Your IPhone does not have a very big preamp and it will ot provide enough power to produce and great sound out of the amplifier! I use the mini plug on the bottom of the I-Phone 5s along with a power supply cord into the bottom so I do not run my battery dead! This arrangement works well.