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The Alpine SPS-406 is a set of 4” x 6”, 2-way coaxial speakers featuring a high-efficiency design.

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The Alpine SPS-406 is a set of 4” x 6”, 2-way coaxial speakers featuring a high-efficiency design that runs well factory/built-in amps, and even better with Alpine head-units. It features a high-powered Poly-Mica cone woofer with a ¾” wide-range silk dome tweeter. The tweeter swivels up to 10 degrees, allowing for custom placement based on the best audio reception. As for the unit’s stats, it outputs up to 140W, but its frequency only ranges between 93Hz and 22kHz. Although well-equipped for an average car-audio system, the Alpine SPS-406 is not recommended for users seeking superior lows, mids, and highs.

Features
  • 2-Way Coaxial (4” x 6”) Speakers
  • Poly-Mica Cone Woofers
  • Wide-Range Silk Dome Tweeters (Swivel)
  • OEM Amplifier or Alpine Head-Unit (Compatibility)
Specifications
  • Tweeter: ¾” Wide Range Silk Dome
  • Woofer: Poly-Mica Cone
  • Power Capacity (Peak): 140W
  • Frequency Response: 93Hz - 22kHz
  • Impedence: 3.6 Ohms
  • Sensitivity: 87dB /W(1m)
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