Power Handling Note
The cone is constructed of silver 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 urethane 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
Material: The urethane foam surround has 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.
and 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.
Voice Coil: The two layer
vented voice coil keeps the woofer cooler and is designed for higher power
woofer is designed to work best in a sealed enclosure with an internal volume of
0.6 cubic feet, or a ported box of 0.56 cubic feet (port diameter 2", port
the specifications section of the manual lists two power handling
specifications, "RMS Power Handling" and "Peak Power
Handling", Kenwood has established "Rated", "Maximum"
and "Peak" input power ratings for this woofer. The "Rated"
input power spec is equivalent to the "RMS Power Handling" spec listed
in the manual, the "Maximum" input power rating is a continuous power
handling specification, and the "Peak" input power rating is equal to
the "Peak Power Handling" spec listed in the manual. The power ratings
are as follows:
- "Rated" input power:
- "Maximum" continuous
input power: 250 watts
- "Peak" input power:
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