Hi!
I have a Beosound Century and absolutely adore it. Have owned it for 13 years (seriously!) and still use it regularly. I don't think it's possible to change the fabric, unlike the Ouverture, but I could be wrong. In regards to connections, there's no Powerlink, Masterlink, or line out - only AUX in, AM antenna and FM antenna.
However, it's possible to modify the unit to achieve a variable output. I had a technician do it for me, and he wired it so that the same DIN connector that carries the AUX signal also include variable line out. Used it to hook up a subwoofer. :)
Leo
BV 10-40, BV 8-32, BL 9, BL 4, CX100, BS Ouverture, BS 2000, BG 4500, Passive, LC 1, A 9