Speakers made with unusual cabinet material

I've seen some DIY speakers made like Magico Minis with layered baltic birch ply.

Sonist uses thick poplar baffle.

I forget the name, but the same guy with the mpingo discs, had thin wall layered laminate speakers.

I have built speakers out of PVC pipe and epoxy urethane.

Thanks, Al, for the links.
And thanks to others, too, for your responses.
-- Howard

Sorry, the name was Shun Mook and the Bella Voce speakers and it's not laminate but birch ply.

There was one I saw made from layered laminate. Same way they make drums.

Some Thiel CS-6s had concrete front baffles. Magico uses 6061 aluminum in their speakers. I have a pair of Green Mountain Audio Europas in my room right now and they seem extremely heavy, dense, and inert.

Sebrof,

X material and M material is just a fancy word for Phenolic board.

Phenolic Board

It is not magic as some want to believe. It is however probably a good material choice for a speaker enclosure because of its inertness, but its not the only one. As previously stated is all a matter of implementation.

Good Listening

Peter