12" Alpine R-Series Shallow Subwoofer with Dual 4-Ohm Voice Coils - RS-W12D4

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With an ultra-shallow subwoofer design and powerful sound output, the R-Series Shallow Subwoofers give you the best of both worlds in size and sound.


  • 12" High-Performance Shallow Bass Driver  
  • Alpine Gen2 DD Linear Magnetic Circuit   
  • Cast Aluminum Frame  
  • Aluminum Dust Cap  
  • Neodymium Magnet

What's in the Box:

  • 12” R-Series Shallow Subwoofer
  • Owner’s Manual
  • Warranty Information
  • Online product registration information

Tech Specs

  • 600W RMS / 1800W Peak Power Handling
  • Compatible with KTE-RS12G Subwoofer Grille Kit (sold separately)

Ultra-Shallow Design

For those looking to add powerful, hard-hitting bass performance to their vehicle but lack the space to add a subwoofer, Alpine's R-Series Shallow Subwoofer delivers the same fun and loud sound you've come to expect, now in a shallow subwoofer that's designed to fit in most vehicle applications.

Extreme Output

Don't let the size fool you – the R-Series Shallow Subwoofers feature the same motor movement (20MM of excursion) as the full-size R2-Series Subwoofers for extreme output in a shallow woofer design. At the heart of the R-Series Shallow Subwoofers is an oversized 4-inch voice coil that houses the lightweight and powerful neodymium magnet for 600W RMS of power handling.

Precise Bass Control

Alpine's Gen2 DD-Linear Magnetic Circuit technology, a compact and efficient dual-gap voice coil structure, allows for better control over the motor, resulting in lower distortion and precise bass control.

Powerful Bass Projection

A lightweight yet rigid aluminum dust cap allows the R-Series Shallow Subwoofer to transition sound quickly with minimal distortion and project the bass off the surface of the speaker for hard-hitting yet smooth bass performance.

Premium Construction

The R-Series Shallow Subwoofers are constructed with a die-cast aluminum frame for a rigid and sturdy construction. For extra protection for the shallow subwoofers, an optional Shallow Subwoofer Grille Kit available in a 12" (KTE-RS12G) option (sold separately) provides a steel mesh grille that protects your investment.

Mounting Depth:3.25” (82.55mm)
X-Max: 20mm
Voice Coil:4”(102mm)
Frequency response:26Hz – 200Hz
Sensitivity (1W/1M): 81bB
Nominal Impedance: 4Ω

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