Can anyone help I have recently brought a Beosound 9000 from ebay but have not recvd as yet it was manuafactured approx 4 years ago. What I was wondering is what mark is this ie mark I or II or III and what features its has IE is it upgradeable to N music etc.

thanks in advance. 

They are all upgradeable to N-Music. Simply upgrade the s/ware to version 2.2  if it does not already have it.

You need to know the type number to find out about the Mk. and then look in the FAQ's in the main site or at the product data for loads of info on BS9000

If it doesnt have a red standby button, its definately a mk3.

 Mks 1 & 2 had the button, Mk3 did not.