hi guys, I've noticed that when I hook my iPod or iPhone up thru my car stereo, the iPhone sounds 10X better! Output is clearer and louder. I have to really crank up my ipod volume to hear it thru the car stereo vs my iPhone. Why is this? Does the iPhone just have better audio output? My iPod is old, 5th Gen Video, think I got it in 2006. Any thoughts?