Fyne Audio SUPERTRAX - Page 8

8
THIN PLY CARBON DIAPHRAGM
To give an extended high frequency
response, it is usual to use a metal
dome radiator. All these materials suffer
from a break-up mode, where the dome
stops acting as a piston, and becomes
uncontrolled resulting in a peak in the
response of some 10dB or more, from
around 20kHz to 30kHz and whereas
considered out of the audio band, this
can be perceived as harshness as well
as limiting the maximum frequency the
tweeter can operate.
The solution we have adopted is to
use a new and unique Thin Ply Carbon
Diaphragm (TPCD), the result of the
material science and technology used
to engineer TeXtreme® thin ply carbon
fabrics. Where a conventional carbon
fabric is woven from thick round yarns,
a TeXtreme carbon fabric is woven from
ultrathin carbon tapes.
This results in higher stiffness, lower
weight and tailored properties.
By optimising the thickness and
stiffness in all areas, the Composite
Sound Metamodal diaphragm can
be engineered for a tailored modal
behaviour, frequency response linearity,
improved pistonic motion and moving
mass optimization, as required. The
modal behaviour can be tailored by
optimising thickness and stiffness
in different parts of the cone or
diaphragm.
The concept of distributed break up
ensures a controlled break up behaviour
with low distortion. By varying the
properties of the TPCD in different areas
and directions, the symmetric break
up modes are eliminated and replaced
with smaller and local distributed break
up modes, enabling a more linear and
extended frequency response, without
any high level resonances. This makes
use of COMSOL composite and acoustic
simulations to optimize thickness,
stiffness and damping at every given
point of the diaphragm to achieve this.
Thus, the frequency response of our
SuperTrax super tweeter is seen to
extend to over 60kHz.
Thus, by using this newly developed
patent pending time aligned
omnidirectional super tweeter, the
reectedenergyintheroomhasthe
same harmonic structure as the direct
on axis energy, thus giving advantages in
perceived air and space compared to a
moreconventionalforwardringsuper
tweeter.
The IsoFlare driver, with its superior
timealignmentintherstplace,
benetsparticularlyfromtheaddition
of the SuperTrax super tweeter, while
still acting effectively as a coincident
point source, as it is still responsible for
generating the vast majority of musical
information.