I have a Koetsu stone with and without diamond cantilever, and indeed it offers notably increased detail, speed, and dynamics without reducing or altering the Koetsu’s musicality or flow - in fact it even helps those attributes. However if your system relies upon the top end reduction of a traditional Koetsu, the diamond models have a bit less of that.
It’s not a "single piece" - the cantilever is made of a different (lower) quality of diamond than stylus, as it has a very light greenish/gray tint. Solid, not pipe. The stylus appears to be fused (I don’t see any glue) into a hole cut into the cantilever. The diamond models have slightly shorter cantilevers than boron and ride a little lower.
They’re a good option for those who love the Koetsu sound above all others, and want the next level of that. It’s available as an optional upgrade for any of the Platinum models (including RSP), but of course doesn’t come cheap. I'm not going to say they're an "essential" upgrade for Koetsu lovers, but I was impressed when I first heard it.
It’s not a "single piece" - the cantilever is made of a different (lower) quality of diamond than stylus, as it has a very light greenish/gray tint. Solid, not pipe. The stylus appears to be fused (I don’t see any glue) into a hole cut into the cantilever. The diamond models have slightly shorter cantilevers than boron and ride a little lower.
They’re a good option for those who love the Koetsu sound above all others, and want the next level of that. It’s available as an optional upgrade for any of the Platinum models (including RSP), but of course doesn’t come cheap. I'm not going to say they're an "essential" upgrade for Koetsu lovers, but I was impressed when I first heard it.