BeoSound 9000 type 252x (from 04-1996) and type 256x (from 09-1998). BeoSound 9000 type 257x (from 06-2001)
This was taken from the product sesection here. I have bought a 2nd life BS9000 MK3 and am very happy with it.
BS9000, BS2300, BC2, BL2500, BL3, Bl2, BS1, BV8, BC4, A8