Our Product Research Team
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Woofers: The Alpine Type-R series component speakers feature
multi-layered hybrid fiber woofer cones; for durability and superior linearity,
they use rubber surrounds.
HAMR Surround: Type-R speakers use Alpine's multi roll HAMR
surround (patent pending), a technology developed for Alpine subwoofers that
maintains control and stability at higher volume levels. HAMR surround combines
increased cone area and long linear cone excursion for deep, powerful bass
Motor Structure: The woofer's High-performance Linear Drive
Motor structure features a square-wire voice coil with a large 30mm diameter,
driven by a small but powerful neodymium magnet. This design provides linear
motion over a wide cone excursion.
Neodymium Magnet: The neodymium magnet on the Type-R series
woofers allows smaller speaker dimensions, making them easier to install in a wide
variety of vehicles. They are also lighter than designs using standard magnet
HD Polymer Frame: The new Type-R woofers use a revolutionary
HD Polymer frame, making the speaker stronger, lighter, and easier to install.
Tweeters: The SPR-50C includes 1" (25mm) silk dome
tweeters. Alpine's EQ Ring improves the tweeter's dispersion characteristics,
providing excellent off-axis response. When using the flush-mount housing you
can also tilt the tweeters up to 15° to focus the sound toward your ears.
Tweeter Mounting Options: The tweeters come installed in a
swiveling flush-mount housing. You can also install the tweeters behind factory
grilles using the included stealth mount brackets. The stealth mount brackets
can be top or bottom mounted. The installed tweeter dimensions are:
||Flush Mount (swivel)
||Factory Location (bottom
||Factory Location (top mount)
||1.7" x 2.8"
||1.7" x 2.8"
Crossovers: The SPR-50C features low-pass crossovers attached
to each woofer's input terminal and separate high-pass crossovers in-line between
the woofers and tweeters. Because the crossovers are separate, the system can be
bi-amped. Two-sided tape is included to mount the high-pass crossovers and their
- Width: 2.65"
- Height: 0.97"
- Depth: 1.27"
Tweeter Attenuation: Each crossover has four tweeter level
options, allowing you to precisely tune the high frequencies to the car interior
and tweeter placement. Using the supplied jumpers select 0dB (no attenuation),
-2dB, -4dB, or -6dB.