Seas Excel Diamond tweeter or Plasma?

Thanks for the post. I actually already own my designer’s former top line speaker (Tetra 606) that has the Mundorf dipole AMT in a rear horn configuration. For sure they disappear and create exceptional “sound”. We are hoping to make something that is superior. My guy wants to make a 4 way with a smaller woofer on top. His plan is to create a sound similar to a duel concentric point source. He is a master with crossovers. Interesting that we have decided on an enclosure shaped like a baby grand piano. Slanted back to time align with beveled edges. He is confident that he can make it sing.
Another friend involved in the design also is against plasma. 

The little I have heard about the Seas Excel is that there is none better.
A least it seems that it may be the hardest material in a dome. So the fastest? And the back is sealed and in a diamond cut... kind of. It looks very cool and the front as well. Price certainly does not always reflect quality. But Seas is a super established and great quality company. It seems that they made the Excel at the lowest price point possible. 
Oh, Kenjit, Kenjit, Kenjit!
Pretty much like Beatlejuice!
But I do admire his chutzpah!
He also has a way with words even if very obnoxious!
Do I require the "Kenjit stamp of approval?'. I HOPE NOT.
But I do kid of miss him.
Do you think he is a complete put on?

I love my Tetra 606s. But I am giving my perspective on this design from a marketing point of view. This is not necessarily a speaker for me to replace my 606s but a commercial product. The 606s are $33k, his 707s are $78k and the piano enclosure Grand Halls should be $88k. My input on this design is relatively minor and superficial.The enclosure will be complex and the crossovers world class and the drivers the best available. And the finish will be carbon fiber piano black. We will get a pair of the Seas Excels to test. The ATC (Volt-same or better, ATC no longer sells its midrange) and 15” TAD both already proven as best. The major task is to make it all work together to truly be an $88k speaker. I am convinced that Adrian Butts is one of the finest speaker designers. Check out his website.
www.TetraSpeakers.com 
If Keith Richards, Herbie Hancock, Winton Marcellus, Ron Carter, etc. will not own any other speaker, who am I to not agree. Do some of the world’s greatest musicians know what is possible in High End Audio? Not necessarily. But they know when their performances sound like they did to them on stage, in studio, etc. Several of these guys own and love their 606s. 707s are a limited edition.