==Headunit==
The head unit found in most models is manufactured by Clarion and is slightly less than double DIN height. ===Security===Two methods of security exist for the headunit. The method used is based on the year of the car. Older models use a 4 digit passcode, which has to be re-entered when power is lost from the car. In new models the head unit is married to a the DICE system in the car and will not function in another car unless it is first divorced from the old car and then remarried to the new car. The Additionally, because the head unit may requires the SID in order to function, it cannot be used in anything but the 900 and 9-3. ===Media===There are primarily two types of head units available, one offering AM/FM and a cassette player, and radio or another offering AM/FM and a single CD and player. The European model offers RDS information such as radio station information while the US unitsubstitutes a weather band option. ===Output===* Speaker Level** Front** Rear* DIN Cable** Line level front** Line level rear** Mute** Amp on** Signal Ground
==CD Changer==
An optional trunk mounted six CD changer was available for the 900 and 9-3.
==Available Factory Systems==
In the United States, base models come with System 2 and could be upgraded to System 3 by the dealer. SE and Viggen models came with System 3 standard.
===Radio Cassette and Front Speakers===