Seen a few threads like this and I accept there may be cases where you need an amplifier here is how to set up an ipod for in car use to maximise the volume available
Go to the main menu on the ipod
Scroll down to settings
Select "Volume limit" and wind the slider all the way to the right and press the centre button
Then press the menu botton and scroll down to "sound check" make sure that is set to off
Now you can use the ipod as normal
You can hear on this video my ipod is operating at a similar volume to the radio and CD player so wont frighten you when the traffic cuts in
http://s80.photobucket.com/albums/j198/liner33/?action=view¤t=P1000169-1.flv
Go to the main menu on the ipod
Scroll down to settings
Select "Volume limit" and wind the slider all the way to the right and press the centre button
Then press the menu botton and scroll down to "sound check" make sure that is set to off
Now you can use the ipod as normal
You can hear on this video my ipod is operating at a similar volume to the radio and CD player so wont frighten you when the traffic cuts in
http://s80.photobucket.com/albums/j198/liner33/?action=view¤t=P1000169-1.flv