4x6" Coaxial 2-Way Speaker Set

SPS-406 4x6

CEA 2031 Speaker Rating:
Max RMS Power Capacity: 45W
Peak Power Capacity: 140W

The perfect sound solution upgrade.

The perfect sound solution upgrade. Introducing Type-S speaker line up, with multiple size options to fit almost any vehicle. If you want to add incredible sounding Alpine speakers to your system, this is the way to go. This latest offering from the popular Type-S family of speakers is a best bet upgrade, and still budget-friendly.

Contact An Expert

Price: U.S. $90.00
(Now Available)

Professional installation available at authorized retailers.



  • Great sounding upgrade speakers at competitive price points
  • Perfect for OEM upgrade, with many sizes to choose from to suit almost any vehicle. New cosmetics look good in your car, and fit easily in your stock
  • Improve the output and sound quality of your vehicle with these highly efficient speaker choices
  • High efficiency design runs easily off of factory or built-in head unit power for an easy system upgrade

Assorted Sizes, Versatile Upgrade

With seven models in the Type-S line-up, you'll find a speaker size to fit your car's needs - and easily install into your stock speaker locations. A shallow mounting design allows for easy installation in a wide range of door panels giving you a perfect fit. Their high-efficiency design can run off of the built-in amplifier power from the factory or Alpine head unit, resulting in an easy system improvement for any vehicle.

Packing a Punch

Turn up the volume. These speakers deliver amazing lows, mids, and highs. Become a believer once you hear the difference between stock and Alpine sound quality. Upgrade your system and see what you've been missing.

Silk Dome Swivel Tweeters

The Type-S coaxial speakers use a soft dome silk tweeter for excellent high frequency sound reproduction. The tweeters can swivel up to 10 degrees so you can adjust for the optimum listening position.


Features and Specification


Power Handling
  •  CEA-2031 Power Rating: 45 Watts
  •  Power Handling Capacity (RMS): 45 Watts
  •  Power Handling Capacity (Peak): 140 Watts
  •  Woofer Mounting Diameter (mm): 84.5 x 143.5mm
  •  Woofer Mounting Diameter (in): 3-3/8'' x 5-3/4''
  •  Woofer Mounting Depth (mm): 41.5mm
  •  Woofer Mounting Depth (in): 1-21/32''
  •  Frequency Response: 93Hz - 22kHz
  •  Impedence: 3.6 Ohms
  •  Sensitivity: 87dB /W(1m)

  •  Tweeter Type: 3/4'' Wide Range Silk Dome Tweeter
  •  Application Type / Design Detail: Internal / Swivel Tweeter
  •  Magnet Material: Ultra Low Distortion Magnet Design
  •  Cone Material: Poly-Mica Cone
  •  Motor Technology: Optimized Magnet
  •  Voice Coil Type: Square-Wire Short Voice Coil
  •  Cooling: Optimized Air-Flow Design
  •  Magnet: High Grade Strontium Magnet
  •  Mounting: Shallow Mounting Design
  •  Frame: Stamped Steel Shallow Frame