New Fischer & Fischer Audio 670 Speakers : Made Out Of SLATE..

They are coming out with their New Next Generation Slate Speakers right now! 

They show you how slate cabinets are made in this video ! 😃😎

https://www.youtube.com/watch?v=kHTfXR2MGAQ

Besides Acora in granite there are also speakers made of concrete like Rauna.

https://www.rauna.com/

Wilson, Magico, Rockport and others also has pretty stiff boxes made of different materials. 

OCD Mikey will be at Capitol Audio Fest with Fischer and Fischer 770.1 with Playback Designs DAC and Server, powered by 150w Nat mono Tubes.  He is promising a top sounding room to compete with the $1m rigs.  

Capitol Audio Fest Nov 10-12, 2023

I've listened to these speakers and I could tell you I'm not that impressed very two-dimensional the monitor audio platinum is much better way more airy spacious three-dimensional and has a more enveloping sounds stage.

If you don't like them, can lay them on their sides and play miniature pool on them?