In case you didn’t know, these fantastic unit do come up from time to time BUT please note (a) this is one of the most flexible yet complicated unit I have encountered in over 40 years which means (b) you must have the special control unit remote because many functions that cannot be easily accessed from the front panel … if at all. This in turn means an official handbook or copy is essential.
Finally, for KEF devotees, especially KEF Kube models of that era, there are hidden functions bespoke for KK models that are advanced and intriguing … if you know how to access them and then how to apply them. The two companies were very close during that era. I can discuss more if invited. H