Make no mistake, I love Vandersteens and respect his ideas on proper reproduction of the waveform, but he is charging 45K here...
It uses the same 12" woofer system as the 5A's with a new carbon fiber/balsa wood mix for the midbass, mid and up. Asking him about it, he mentioned the flex that occurs with his previous cone materials that this new combo cures.The balsa (thats right balsawood) is both light/strong and adds damping to the CF and at the same time is rigid end to end where flex is bad for detail/transient. Somehow he found a way to lay the fibers down to maximize what he wanted to do with the CF.
It sounded fabulous of course (Clearaudio/Aesthetix) But he could have offered it on the 5 series since it uses the same compliment of drivers, size and all, alas-.
Still if you have the bucks and appreciate a master of technical knowhow on how to do it right, this is your speaker
Regards
David