i have a problem with my iPhone. i have a sony surround sound at home with a ipod dock built in, i tried it with my iPhone but the music is not loud. i thought it didn't work because i thought it was only made for the ipod. but when i tried my friends iPhone it works perfectly. i can even control it using the remote control. im also having the same problem in my car. i tried listening to music through my radio transmitter but i can only hear a little bit of the instrument not the music. i tried restoring it and everything but im having the same problem over and over again. does anybody know what the problem is. or how to fix it please.