ZEN cartridge ?

Prof. Hiroaki Hibino, a long time user of Klipsch speakers,
was not satisfy with the dynamic performance of the regular
carts and designed his own. He demonstrated his cart to Paul
Klipsch who was so impressed that he ordered 4 (?)models
with different cantilevers to satisfy different subjective
preferences. Those are known(?) as 'Klipsch MCZ -' carts.
Later on Hibino produced 'the same' cart under his own brand
name 'Zenn MCZ'. If I remember well the cantilevers were:
aluminium, boron, sapphire and diamond. I own the Klipsch
MCZ-2 with aluminium cantilever.

According to the user manual provided by my MCZ-2
(aluminium cantilever) the specs are nearly identical.
The only difference is compliance depending from the
cantilever but not worth mentioning. The specs as
provided by comrade Mofimadness need some corrections:

Fr. range : 20Hz-45 KHz
Impedance : 2 Ohms
VTF : 1,8 +/- 0,3 g
Weight : 5,1 g