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Enclosed Subwoofers


Bassline 12″ Dual Subwoofer Enclosure


Not available online


Building on Alpine’s long heritage in subwoofer engineering, Alpine created a subwoofer line that could spread the passion for deep, hard hitting bass. Bass Series subwoofers use a polypropylene and mica damped cone assembly to keep the cone stiff and light for great sounding bass tones, whilst the high-excursion polyfoam surround provides high output bass. Bass Series subwoofers are known for their reliability, small size and big power output.

The SBW-D12S4 combines 2 of the new Bass Series 12″ Subwoofers with a perfectly matched custom sealed dual enclosure, precisely designed and engineered to produce the best sounding bass.


  • Custom Sealed Enclosure
  • W12D4 Bass Series Sub Pre Installed
  • 12” Dual 2Ω Subwoofers
  • Progressive Wavelet Ribs (P.W.R.) Cone Design
  • Heavy Gauge Screw Terminals
  • Polypropylene and Mica Cone
  • Polyfoam Surrounds
  • High Strength Custom Steel Frame
  • 8 AWG Push Terminals
  • Progressive Polyester Spider
  • 2 Piece Yoke with Vented Pole Motor Structure
  • Optimised Magnet Circuit
  • Grille Included


  • 500W RMS Power Handling
  • 1500W Peak Power Handling
  • Dimensions (cm): 39.6 L x 76.6 W x 29.6 H
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