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The Alpine SPR-57C is a set of 5” x 7”, 2-way coaxial car speakers built as an upgrade from the SPS-507.

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Pros

Sufficient bass response for many listeners - Rock, Country, Blues and Pop styles sound warm and full-bodied

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"Type-R" tweeter components provide excellent high frequency support - clearer and more consistent than "Type-S" units

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Integrates seamlessly alongside other aftermarket audio components - natively supported by Alpine amplifiers and in-dash media players

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Simplistic install offers immediate usage - compatible with most stock wiring configurations, doesn't require any additional cabling

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Fully functional without the use of an amplifier - great for smaller cars and users not requiring higher volume output

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Excellent performance at the price point - users notice a considerable increase in sound volume and clarity

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Cons

May inhibit window use when paired with a baffle - blocks the path of manual and power windows on many trucks and cars

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Edit

 

The Alpine SPR-57C is a set of 5” x 7”, 2-way coaxial car speakers built as an upgrade from the SPS-507. It includes an improved design with a rigid custom-cast aluminum frame, an optimized air-flow design for superior cooling, and a shallow-mounting design for easy installation. Each speaker in this set hosts both a Kevlar Reinforced woofer and a 63/64” swivel tweeter—it can be swiveled up to 10 degrees. Unique about this model is its flat copper wounding, which helps to contribute to the unit’s high-powered 300W power handling. Note also the Alpine SPR-57C’s wide frequency range from 65Hz-22kHz.

Features
  • 2-Way Coaxial (5” x 7”) Speakers
  • Upgraded Design
  • Linear Drive Motor
  • Kevlar Reinforced Woofer
  • Swivel Ring Tweeter
  • Low-Distortion Design
Specifications
  • Tweeter: 63/64” Ring Tweeter
  • Woofer: Poly-Mica Cone
  • Power Capacity (Peak): 300W
  • Frequency Response: 65Hz - 22kHz
  • Impedence: 4 Ohms
  • Sensitivity: 87dB /W(1m)
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