what a nice chap "Guido" at Tentlabs is
I think I might have my Ouverture upgraded using some of the things that Guido has in his lab/shop :-)
He told me that all the 2300 series ( and in fact most B&O CD players ) use 11.2896 MHz Oscillators
I then found out that all the Beocenter 2300 family uses the famous Philips CD-PRO modules that they have been making since 1984
http://www.beocentral.com/families/bc2300
http://www.marantzphilips.nl/Philips_cdm12_cdm-Pro
According to Guido, it is also a good idea to change the output opamps LM833 for OPA2134, and see if coupling
electrolytics can be improved or taken out (in case no offset is
present)
Did your CD7000 sound noticeably better for the upgrade ?
Peter