i have a 06 ultra - i plug my mp3 player into the port of the radio aux port and when i go to use it i must have the volumn all the way up on the player in order to hear it thru the speakers. has anyone else has a similar problem?
You will find that any device played through any AUX port will behave the same. The lower volume is also true for car radios with AUX ports. If the volume is too low even with both the device and radio volumes turned up, then you can add an amplifier, either passive or powered.
that is a common thing for a lot of MP3 players, especially if you are using a line from the headphone jack to the radio....it is the same way in my truck and bpth cars