I've just put some pages of the Crest Audio V12 (with fully balanced buses)
http://alterneo.free.fr/schematics/Crestaudio/
Crest Audio V12 page: http://www.crestaudio.com/products/v12/
http://alterneo.free.fr/schematics/Crestaudio/
Crest Audio V12 page: http://www.crestaudio.com/products/v12/