I think it's a synery thing, I've used KCAG with tubes and found it to be wonderfully open sounding and not at all bright. However with ss amps, particularly more medium-priced stuff, it might be bright or simply too revealing. I don't think you can say the cable is intrinscaly bright however.
Do Kimber KCAG's sound bright????
I have Kimber KCAG through out all my connections except for Transparent Audio speaker cables and PS audio power cables. My system sounds a little bright. Have Bryston amp and Adcom preamp. Is copper all round better???? Mike