Are exotic speaker cabinet materials overrated?

Hello hiendmmoe!  If speaker cabinets are builtf rom acoustically inert materials, they are great. I have been building small and larger cabintes for 15 yeqrs or so. You want stone coutertops such as used in kitcher remodels. Broken counter tops are available from fabricators of such things at very low cost. You won't have a choice of colors or size, but visit a few shops and you'll have what you need in a few weeks. They will cut them to size for you if you don't want to invest in a diamond saw. They are used to making precision cuts. I use silicone rubber to glue the pieces together. Front panels are plywwod and MDF sandwhiches. The backs can be mostly coutertop material cut 6" short to allow for MDF panels for mounting speaker terminals. If you think you will need access to the interior, use rubber weather stripping instead of glue under the lip of the top slab. Gravity will hold it down airtight. You can lift the top off whenever you wish. Enjoy the music.

P.S. Open baffles sound better and much easier to move.

http://scaena.com/speakers.html

I notice no boxy coloration with each driver enclosed in special ceramic compound. Thomas

Manufactures have been switching to lighter, thinner enclosure materials which makes lots of sense when they include the costs to ship their speakers to vendors or drop ship them to customers. They've taken advances copied from the British to make enclosure resonances consonant with those generate buy the drivers while they're reproducing music. The British took this approach because the BBC needed monitors to be light weight and mobile for onsite field applications.

Realistically in the home environment enclosure resonances aren't as important or obvious under most circumstances as listeners want to believe. Instead, engineers design them with heavier and more ridged materials or radiuses where they're needed, lightweight braces in strategic locations and in addition specifically placed damping materials along encloser walls (bitumen or tar) where they've detected uncontrolled resonances during the development phase.

@hiendmmoe I don't know about ALL their speakers, but Focal Stella Utopia EM Evos are made from MDF with laminated outer finishes per The Absolute Sound review. I think you'll find that's the most common with nearly all mass-produced speaker brands. MDF and HDF are just so much easier to work with and produces some of the best measuring enclosures there are. Before Klippel scanners and accelerometer software, designers just kinda "overbuilt" cabinets. (Think of bridges or older buildings. Yes, you can build a speaker out of Bubinga but you don't need to.) With the advent of better manufacturing tools and testing software (i.e. not needing to invest in an anechoic chamber), manufacturers can test for unwanted resonance in any material. Also worth mentioning is probably over 90% of speakers are built to a price point and include compromises. Cabinet material that never sees the light of day is one of those compromises. 

This all helps keep the glue companies in business not to mention the spray painters...very high tech. easier to use the crossover to toss out on wanted frequencies so as not to have screw with cabinet shape....which makes buyers uncomfortable.