Hi Macrojack. I think the original Obsidian plinths from Technics are fine, and I own two of the SH- B3 and one full Obsidian SH-B5. As stated above by Pryso, these all weigh under 20 kilos.
The OMA slate plinths weigh about 100 pounds for the two layer versions, and half that for the single layer, so we are talking about very different mass from what Technics put out as a product- I doubt plinths of pure stone like slate weighing that much would have gone over well with their marketing people.
Not to mention the fact that without a waterjet, making complex and precise cutouts through slate 2 inches thick would have been difficult if not impossible. It certainly would have been too expensive at the time to offer as a product.
The OMA slate plinths weigh about 100 pounds for the two layer versions, and half that for the single layer, so we are talking about very different mass from what Technics put out as a product- I doubt plinths of pure stone like slate weighing that much would have gone over well with their marketing people.
Not to mention the fact that without a waterjet, making complex and precise cutouts through slate 2 inches thick would have been difficult if not impossible. It certainly would have been too expensive at the time to offer as a product.