Alpine SBR-S12D4 Type-R 12″ Subwoofer Enclosure


12″ Type R Subwoofer in tuned Enclosure


This product has been discontinued.


Alpine SBR-S12D4

Type-R 12″ Subwoofer Enclosure


The Alpine SBR-S12D4 12″ Type R Subwoofer is a slot ported box designed and engineered in the USA, featuring the new Alpine SWR-12D4 12″ Type-R Subwoofer capable of handling a massive 1000 watts RMS!

This stylish enclosure is perfectly matched to the subwoofer for optimum output and sound quality. Built to play low and loud, the Alpine SBR-S12D4 delivers powerful, clean bass with exceptional accuracy and deeper bass excursion.

With new aesthetics and improved power handling over previous models, the new Alpine SBR-S12D4 sets the benchmark for looks and performance.

* 1 Year Warranty as per Alpine Electronics Australia Terms & Condition’s

Alpine SBR-S12D4 – Features

  • Kevlar-Reinforced Carbon Fibre Cone
  • High Amplitude Multi Roll (HAMR) surround
  • Designed and Engineered in USA
  • Slot port box design
  • Heavy gauge screw terminals
  • 3000W Peak Power
  • 1000W RMS Power
  • Voice Coil configuration: 4ohm + 4ohm
  • Frequency Response: 26Hz-200Hz
  • Dimensions: (L x H x Wcm) 45 x 43 x 41

Alpine SBR-S12D4 – Specifications


  • Sealed: 12″
  • Frequency Response: 24Hz-200Hz
  • Power Range: 300W – 1000W RMS
  • RMS Power Handling: 1000W
  • Peak Power Handling: 3000W
  • Magnet Weight: 127oz
  • Voice Coil Diameter: 65.5 mm (2.6″)


Thiel-Small Parameters

  • Sensitivity (1W/1m): 84.9dB
  • DC Resistance: 3.8ohms + 3.8ohms
  • Inductance: 3.33 mH
  • Free Air Resonance: 28 Hz
  • Equivalent Stiffness: 46L
  • Mechanical Q: 6.04
  • Electrical Q: 0.52
  • Total Q: 0.48
  • Cone Area: 479cm²
  • Linear Excursion: 20 mm
  • Mechanical Travel: 72 mm

Note: Specifications are subject to change without notice.

Signature Car Sound, your local Authorised Premium Alpine Dealers, Stockists and Installation Centres on the Sunshine Coast