The cone is constructed of blue Pearl Mica Injection-Molded Polypropylene.
Uniform pearl mica crystals form an overlapping structure that adds strength and
heat resistance to polypropylene; the result is reduced distortion and improved
reliability. The woofer uses a foam surround.
Woofer Cone: The cone
is formed with three raised ridges around the circumference of the cone. The
width of each ridge is graduated, making a tornado-like appearance. The ridges
make the Tornado Cone much more rigid than conventional cones, with resonances
that are more than an octave higher. Additionally, the Tornado Cone's resonances
are of a more random nature than those of conventional cones, which reduces
their intensity. Since these resonances are lower in amplitude and far above the
woofer's useable frequency range, they are much less audible, resulting in
clearer, more detailed bass sound.
Material: The urethane
surrounds have very high internal loss, which reduces speaker cone distortion.
Pole Piece: The pole piece has been extended to provide a more
linear magnetic field for woofer operation. This lowers distortion and provides
the woofer with better low frequency response.
Vented Pole Piece: The
vented pole piece allows air to circulate in the voice coil gap; air circulating
in the voice coil gap helps dissipate heat and results in greater power handling
and increased reliability.
Bumped Back Plate: The back plate has been stepped deeper to
allow the woofer more room for excursion without bottoming out. This enables the
speaker to be used in a smaller enclosure. Additionally, the back plate has a
vent which efficiently and quietly circulates cool air around the voice coil. By
keeping the voice coil cooler, power handling is improved.
The two layer vented voice coil keeps the woofer cooler and is designed for
higher power handling.
Type/Volume: The woofer is designed to work best in a sealed
enclosure with an internal volume of 1.5 cubic feet, or a ported box of 1.5
cubic feet (port dia 3", port length 6").
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