KEF's meta material gimmick?

I see no problem. Just an appeal for a counterparty for a bet.

Not me.

Meta sounds like Aerogel.

Aerogel is often cited as the world’s lightest solid, but that’s not entirely accurate. It’s a low-density network of interconnected pores, with each pore filled with air. Despite its fragile appearance, aerogel is incredibly strong. It can support up to 4,000 times its weight and has a compressive strength of 10,000 psi. Aerogel has been used as an impact-absorbing material in bulletproof vests to spacecraft.

So how does this solid and lightweight material made? The process begins with a silicon-based compound combined with a solvent to form a gel. The gel is then supercritically dried, removing the solvent at a pressure and temperature above its critical point. This leaves behind a network of air-filled pores, resulting in up to 99% air material.

It's an incremental improvement to an already excellent design. Over-marketed probably, but it has its merits.

@Jasonbourne52. Better than Linn Kans - now that's damning with faint praise...

My Revival Audio Atalante 3 speakers use a form of sound deadening behind the dome of its tweeter that does what KEF uses, albeit in a different manner. They call it ARID and It absorbs about 95% of the rearward sound from the tweeter, practically eliminating any standing waves behind it. Straight out of the box, it's some of the cleanest, clearest sound I've heard.

Does everyone think everything's been invented that can be invented?

All the best,
Nonoise

Interesting speaker, never heard of Revival until now.  Price is very economical would like to hear them, possibly for a second system.