Speakers made with unusual cabinet material

I am using a pair of Rosinante Evolution Signature's that are made of a complex synthetic marble. The base, which holds the crossover, is made of a special material called DarkMatter. The result is a non-resonant loudspeaker enclosure that images better then anything I have ever owned.

solid wood = resonance problem. it's only for consumer's attraction. veneer is much simplier, cheaper and better.
exotic materials such as marble are too expensive. gotta be makin over quarter million after tax if you want to have those.
i was intrigued by performance of Event Opal active monitors enclosed in santimeter thick aluminium chassis where amps have no heat issues at all at any usage or abusage.

solid wood = resonance problem. it's only for consumer's attraction.

Not if it's done right. Although doing it right may result in a cost disadvantage relative to veneered approaches. See the comment by Daedalus_audio in the thread I linked to earlier.

Regards,
-- Al

The original B&W CM1 (1987) had a plastic matrix enclosure.

B&W Nautilus 801/802 midrange enclosures are Marlan.

Unity Audio made some speakers with Corian cabinets.

Essence made speakers with cast concrete enclosures.

Waterfall speakers have glass cabinets.

Doin' right with veneer will not compromise doin' right with solid wood only with smaller expense. Next move of solid-wood or any other higher-priced materials manufacturer is to convice consumer.