Here is a article Truth about Beryllium_Diaphragms from 2009.
They refer that even in very old yamaha speakers (1987...) Beryllium was used. But Technology have moved and hopefully Marketing too.

SEAS also have a Beryllium chassis and SEAS is used in Meridian speakers - so maybe that will used. As long as you don't play to loud the tweeter will not burn and harm you wink

Are the DSP present at the show, can somebody listen?


800v3/218/271/8k.2/5k5s smile /5kC/DSP3200/Reviver/
TT-ELP/Graham Slee Revelation/Trinnov Altitude 32/OPPO 205
__Ayon/HB/Shunyata/Miltzow -- power cables,
__Ayon/Jungson/Miltzow --analog, Miltzow-- digital,
__Vortex/WMA ,