  Having played a lot with hi-tech honeycomb composite
structures and in general composite cones (Kevlar, carbon fiber,
Dyneema), I have always liked the sound quality and performance
of Jürgen’s ZSS cones. I had made a few projects with Görlich
who has been continuously making 'Z' cones, having taken over in
the 60s the manufacturing from his uncle Dr. Podszus. However
the brittleness and health-related issues of the phenolic
material were a concern. For my new developments I have used a
syntactic foam of aerospace derivation, formulated such as to
have a different density along the depth on the cone (smaller
cells near the outer skins, bigger ones at the centre of the
core). The very special skins are state-of-the-art for this
application, consisting of nano-graphite fibres in a 3D alea
structure matrix (hypergraph) strengthened with vacuum/plasma
Titanium surfaces. Thus was born the Ariacell GTi = Z3. The
early 'Z' cones had a paper back skin and an aluminium front
skin. Görlich introduced the second itera