A reappearance of Black Diamond Racing?

I knew DJ.  Very intelligent and creative.  I use BDR products all over my system.

I've tried just about everything out there over the past 40 years and the BDR stuff is probably the most effective that I've used.  I really believe in it.

WONDERFUL and highly recommended!

Never got off on em. It wasn’t due to lack of trying, either. I find BDR cones to be toward the bottom of my short list with NASA grade ceramics at the top. I have found extremely hard cones sound best, more open and more dynamic and more natural, whereas relatively soft materials sound relatively uh, worse, blunted and compressed. Relatively soft materials such as carbon fiber, brass and hardwood (kind of an oxymoron in this example). The shape of BDR cones is all wrong, too. The correct shape is a ballistic shape a la Super DH (Diamond Hardness) Cone or the robust Michael Green brass cone.

“Because it’s what I choose to believe.” - Dr. Elizabeth Shaw in Prometheus

”Everything is relative.” - A. Einstein 

@geoffkait ,

You only list BDR cones as your reference. I have the cones but my experience with them is not as positive as the shelves, or in my DIY projects with cf sheets.

@mofimadness ,
+1

Do I detect a typo or something in that last post? 🤔

Goldensound is discontinuing their line of DH Cones. I was told this a few weeks ago when I ordered a set. I got the last set of Super cones in the US. They have stock in their Taiwan facility, but that's the last of it.
Thanks to @geoffkait for turning me on to these amazing devices. 
IMO, they add more realism than the BDR.