Two diffrent radios and two diffrent sound-systems were possible.
The radio "Gamma" with the normal sound-system was standard, this system was passiv, the amplifier was in the radio, the radio was able to take cassetts but no CD-changer could be used.
The radio "Delta CC BOSE" had allways the aktiv BOSE-sound-system, here every speaker has his own amplifier, the CD-changer was a option, the radio was able to take cassetts.
A CD-radio without tape-system was never offered in a PLUS.
Schöne Inselgrüße Marc