Head unit modification on a 1999-2005 Saab 9-5 to add a line input for
external media player connectivity.
A digital music player is an attractive and convenient source of music in
the car, but the
stock head unit does not have a line input. Many people end up using an FM
modulator or a cassette adapter, which inevitably sacrifices the sound
quality. Not everyone agrees to this compromise, especally if you have
a premium Harman Kardon stereo in your car, or a custom upgraded system.
There are several alternative solutions for direct MP3 player connectivity.
This guide shows how to do it
yourself by using the tape deck inputs of the internal amplifier. It is
a relatively easy and inexpensive way to add a direct line input to your
stock head unit without sacrificing any existing functionality.
Thanks to Daniel
Giertz and all the Saab forum members who did the research and
contributed to the installation guide.