Our Product Research Team
At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere.
That's because we have our own in-house Product Research team — they open the box,
verify contents, check the owner's manual, and record dimensions, features and specs.
We stay on top of new products and technologies to help people make informed choices.
Dual Voice Coils: For increased
system flexibility, the woofer has two 4-ohm voice coils. When the voice coils
are wired in parallel with each other, the woofer presents a 2-ohm mono load.
When the voice coils are wired in series with each other, the woofer presents an
8-ohm mono load. In addition, each coil may be connected to a different
amplifier channel and each channel will see a 4-ohm load.
Advanced Fiber Cone: The
molded fiber cone is laminated with a woven fiber cloth. PBO fiber provides
higher sound velocity and better internal loss characteristics than found with
other materials; this results in higher sound pressure levels without cone
noise. This cone material is highly resistant to the elements, so, over time,
the specifications of the cone will not change due to the environment.
Woofer Design: 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 resonant
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 resonant 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.
Piece Rubber Surround and Gasket: A
one piece rubber surround and gasket attenuates basket vibrations, improving
Steel Basket: The
design and metal thickness of the basket provides vibration attenuation equal to
that of cast aluminum.
Vented Pole Piece: This
woofer is made with a one-piece back plate and pole piece. The yoke is bumped
for long excursion. The vent opening is flared and shaped into a spiral to
reduce wind noise.
Speaker Terminals: The speaker terminals
are gold-plated for corrosion resistance. The terminals are screw terminals with
standard type male quick-slide terminals sticking out from the bottom terminal
plate. This configuration allows you to attach bare wire, wire terminated with
spade connectors or wire terminated with female quick-slides. The width of the
screw terminals is 0.543". The dimensions of the quick slide terminals are:
0.187" W x 0.03" thick.
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
Recommended Ported Box
Volume: The ported 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. One 3" diameter x 7" long port should be used with a 1.5
Handling: The woofer has two 4-ohm voice coils, and each coil
can handle up to 300 watts of continuous input power (600 watts peak). 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:
300 watts (150 watts per coil)
- "Maximum" continuous
input power: 600 watts (300 watts per coil)
- "Peak" input power:
1200 watts (600 watts per coil)