Beryllium Tweets

In a recent speaker project, I went from a Seas Excel softdome ($322) to a Seas Excel Berillyum ($770). The change was night and day. The Beryllium was much cleaner and much more realistic with a higher resolution. No harshness at all!



hummm now ya got me reconsidering,,,after having read a  bit of~~~insider opinion~upon mentioning my great appreciation for the SEAS Thor, especially the Legendary Millenium,,,said the rep, he perfers the Millennium vs the Beryllium. 
back when my set up had the Jadis Orch Refer with EIKT90 ~~although they voiced a  harshness in upper range, their voicing in human vocals was outsanding **soundstage**. Employed Amperex Bugle Boys in the 3 pre slots,,as i was unaware of Telefunken's superior range at that time in my audiophile journey. Shoulda kept the JOR and moded it out with all new caps, new power 6550's (Svetlana vs Shugaung??) and employed the Telefunken,,I'd be alot further ahead and  more cash in my back acct.
searched all over YT for the Beryllium tweet experience, nothing, much, just a few low level muisc vids which made it impossible to determine the voicing of the Be.
So just maybe , after I pay for my mod today of swapping out the new carbon Film resistors for Takman metal resistors (which jadis had employed originally in the Defy),,,just might give the Beryllium tweets a  try, ,,there is a pair offered on ebay for $220,,from china,,so can not return. It is hard for me to imagine any tweet which can voice as the Millenium under optimum  components. 
For me the Millennium is the benchmark for all tweeters. 
But for $220, i'm willing to take the chance. 
Can not afford to experiment with the Seas Beryllium,,as it is wayyy out my budget. 
After I pick up my Defy today,,I will upload a  new YT vid with another cam which has a  external mic,,as the Sony only offers builtin mic and offers poor sound resolution.
Will post a  YT vid here, tonight,,,My hunch is the Takman metal (plate)resistors are superior to the carbon film.
Jadis employed Takman in the design for a  good reason. 

I have them in my MAGICOS they sound wonderful you are entitled to your opinion(which is WRONG).

The motor in the Magico's far outclasses the micro-motor tweets in Focals.

It is only because of marketers that we even think of Be as a selling point. 
Don't get me wrong, Be is a cool high tech material, but a specific Be tweeter is a very different thing than the brand that Be has become.

@yyzsantabarbara   On their website they call it Zylon.  It is proprietary composite material, so it might be hard to find out what it is.  Engineering, most likely, will go that route, designing new materials with extreme stiffness at very low mass.  Have you heard these speakers?

fyi... Yamaha or Pioneer claims that they are the inventors of BE.  They might be the first person to use vaporized BE on the tweeter and midrange but not pure BE (To me it’s not consider pure BE).  Only a few industries does pure BE that is Radian and TruExtent Materion, the rest are subsidiaries.  Even Jbl, jmlab, seas, Paradigm and Scanspeaks do not make their own BE,  actual (materials) are made by Materion TruExtent.  Company like Usher and China made BE are not true BE, they are Faux n Vapor BE.