The cone is constructed of 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
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 resonance frequencies that are
more than an octave higher. Additionally, the Tornado Cone's resonance is of a
more random nature than those of conventional cones, which reduces their
intensity. Since the resonance frequencies 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 foam surround has very
high internal loss, which reduces speaker cone distortion.
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.
Gold-plated Speaker Terminals: This
sub allows you to connect the speaker wire using quick-slide
connectors or spade connectors. The width of the slide terminals are
0.187". To use the spade connectors, there are screw terminals with a
maximum of 0.388".
Recommended Sealed Box
Volume: The sealed box sizes recommended by Kenwood range from 0.8
cu/ft to 1.5 cu/ft. Within this range, the ideal size recommended by Kenwood is
1.0 cu/ft, so this is the enclosure recommended by Crutchfield.
Box Volume: The vented box sizes recommended by Kenwood range from 1.0 cu/ft to
2.0 cu/ft. Within this range, the ideal size recommended by Kenwood is 1.5 cu/ft, so this is the enclosure recommended by Crutchfield. One 3"
diameter x 7" long port should be used with a 1.5 cu/ft enclosure.
Handling: Although 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: 400 watts
- "Peak" input power: 800
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