Alpine S-W12D2 S-Series 12" Dual Voice Coil Subwoofer

Alpine S-W12D2 S-Series 12" Dual Voice Coil Subwoofer

  • $229.00
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  • 12” 2Ω+2Ω Subwoofer
  • High Strength Custom Steel Frame
  • Push-Type Insert Terminals
  • Dual Voice Coil Jumper System
  • Concealed Mount Gasket System
  • Strontium Ferrite Double Stacked Magnets

The S-Series Subwoofers incorporate two strontium ferrite magnets that are stacked together, providing increased motor strength and excursion which ultimately delivers and accurate bass to your music. Installation time will be significantly reduced with the convenient push-type insert terminals with dual voice coil jumper system. Just strip the speaker insulation at the wire end, then insert the bare wire into the hole of the spring-loaded push terminal. While the concealed mount gasket system creates a clean, finished appearance for any vehicle.



  • Material: Pulp/Kevlar Cone
  • Design: Reinforced Parabolic Cone Structure with PP/Mica/Talc Dust Cap


  • Design: High Amplitude Multi-Roll (HAMR Surround)


  • Design: Progressive with Reinforced Layer Tinsel Leads

Voice Coil

  • Material: 5-Layer DVC Winding on AL Former
  • Design: 65mm Voice Coil with High-Temp
  • High-Excursion Underhung Voice Coil Configuration

Motor Structure

  • Pole Geometry: Airflow Optimized Dual Flare Pole Vent
  • Perimeter Venting with Airflow Management System
  • Configuration: Double-Stacked Strontium Ferrite Magnets


  • Material: High Strength Steel Frame


  • Layout: One Side
  • Design: 8AWG Push Terminals with VC Configuration Jumpers

Tinsel Leads

  • Design: Reinforced Layer Spider Integration


  • Design: Concealed Mount Gasket

Power Handling

  • Power Range: 600W-1800W
  • RMS Power Handling: 600W
  • Peak Power Handling: 1800W


  • Mounting Depth: 5-1/16”


  • Frequency Response: 24Hz-200Hz

Recommended Box Enclosures

  • Recommended Sealed Box: 0.85 cubic foot (gross volume)
  • Recommended Vented Box: 1.71 cubic foot (gross volume), 12.5” x 1” vent area, 16” vent length

 Thiele-Small Parameters

Sensitivity (1W/1m) – SPL

DC Resistance – Re

Inductance – Le

Free Air Resonance – Fs

Equivalent Stiffness – Vas

Mechanical Q – Qms

Electrical Q – Qes

Total Q – Qts

Cone Area – Sd

Linear Excursion – Xmax (1-way)

Mechanical Travel – Xmech (P-P)