KEF's meta material gimmick?

seanheis1,

Typical conventional tweeters are sealed in the back, so Revel (and most other speaker companies) are doing nothing about the energy radiating from the back of the tweeter diaphram. 

The new series do seem to minimize brightness and metallic overtones, possibly at the expense of detail from what I have heard during demos.  
 

My guess is that the loss of detail would be due to frequency response shaping…less metallic sounding would imply lower distortion. 

I don't feel the Meta's live up to the hype.  I immediately had to buy the KC62due to the lack of bass.  Just recently replaced them with Fyne Audio's F500-SP.  My wife immediately noticed the difference in musicality and soundstage.

I have both original and newer meta ls50s. Like them or not, the metas are the real deal as advertised. No BS. Plenty of that elsewhere. I love that! Size is their only limitation. Other newer meta models solve that problem as well but for additional cost, of course. 

There are lots of reviewers who had the original LS50s and then tried the LS50 Meta who found big or small differences so you could check them out.

I bought the LS50 Metas recently used and once I found a set up that really made them sing, I am happy with them.