I have been living with a Koetsu Rosewood Signature Platinum with diamond cantilever, for six months now. Wonderful.
I was a little apprehensive after hearing and reading that the diamond cantilever "destroyed the Koetsu magic", so I was primed to hear excess brightness. Well, if you don't hear excess brightness on Bach's violin concertos, or Barber's adagio for strings, you won't hear it elsewhere. Especially when electrostatic speakers are your reference.
What the diamond does is eliminate a source of resonance, because the cantilever and stylus are ground from one piece of solid diamond. The sound is uniquely clear and transparent. In my opinion.
I was a little apprehensive after hearing and reading that the diamond cantilever "destroyed the Koetsu magic", so I was primed to hear excess brightness. Well, if you don't hear excess brightness on Bach's violin concertos, or Barber's adagio for strings, you won't hear it elsewhere. Especially when electrostatic speakers are your reference.
What the diamond does is eliminate a source of resonance, because the cantilever and stylus are ground from one piece of solid diamond. The sound is uniquely clear and transparent. In my opinion.