The Black and Black Diamond digital RCA (BNC) has just been reviewed by The EAR
These are just two quotes from it indicating the increasing improvement these cables make:
Black DRCA QUOTE:
"The sense of realism, of immediacy, was increased, and not in a subtle way, there was definitely more micro-detail coming through, for example, handclaps, perhaps a rhythm guitar part or a second voice, which had not been readily apparent on the first listen. The music seemed to come from a darker, more silent space."
Black DIAMOND DRCA QUOTE:
" Any sense of ‘digital’ was gone – this was pure music, flowing effortlessly and with terrific realism, from a ‘lowly’ 16/44.1 CD no less... For somebody who has always maintained that his preferred way of listening to music is through a vinyl replay system, here was the startling realisation that digital can be every bit as enthralling. Indeed, I would say that my listening is now split about 50/50 between vinyl and CD, which is not something I ever thought would happen. "