Woofers: The Alpine Type-R
series component speakers feature woofer cones made of hybrid layered-pulp with
mica coating for great bass response. For durability and superior linearity, the
woofers have rubber surrounds.
Motor Structure: The
High-performance Linear Drive Motor structure features a large magnet that is
almost as big as the voice coil diameter. Its dual radial magnet and twin gap,
combined with a square, edge-wound voice coil, gives the diaphragm linear
movement over a much greater range. This design allows the speaker to be
faithful to the input signal even during high excursion, for accurate musical
reproduction and deep bass.
Adapter Rings: The SPR-17S
component speakers come with two pairs of adapter rings. One set of rings allows
you to install the woofers in 3-hole 6-3/4" GM/Chrysler installations or
3-hole 6-1/2" installations. The other
set of rings will adapt the woofers for 6"x8" openings.
Tweeters: The SPR-17S component speakers
are equipped with 1" (25mm) silk ring-dome tweeters for greater detail and
bright, crisp highs.
Tweeter Mounting Options: The
tweeters come installed in a swiveling flush-mount cup. You can also install the
tweeters in a stealth mount when it will be hidden behind a factory grille. The
stealth mount can be used as a top mount or a bottom mount.
Tweeter Mounting Dimensions:
Crossovers: The SPR-17S component speakers come with 2-way external
crossover networks. The crossover features a 6dB/octave low pass filter for
the woofers, and a 12dB/per octave high pass filter for the tweeters.
Attenuation: The crossover has a 7-level tweeter adjustment to allow you
to precisely tune your high frequencies. Using the supplied jumpers, you can
select 0dB (no attenuation), or 6 levels of attenuation: -3dB, -4dB, -5dB,
-6dB, -7dB and -8dB.
Connections: The crossover features
gold-plated screw terminals for the amplifier inputs and the woofer and
tweeter outputs. The screw terminals are hidden by the crossover cover.
Mounting: There are two holes in the base of each crossover for the two
mounting screws. Each crossover comes with flat speed clips.
The crossover has the following dimensions: Width=4.525", Height=1.265",
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