Alpine SBR-S8D4.2 R-Series 8” Compact Subwoofer in Tuned enclosure

Award-winning SBR-S8D4, named INCAR SUBWOOFER OF THE YEAR – LOADED ENCLOSURE for 2017 - Just got better!




Loud, Clean Bass That Fits Anywhere


The Alpine SBR-S8D4.2 features Alpine’s Type-R 8″ subwoofer in a custom slot ported enclosure. Ideal for installation in small spaces, its compact size means it can fit virtually anywhere.

The pre-installed subwoofer employs many features typically found in larger models, such as Alpine’s H.A.M.R (High Amplitude Multi-Roll) suspension. This unique design allows greater linear excursion while improving control, to achieve maximum output and outstanding sound quality.

Designed to achieve optimal output, the carpeted enclosure features heavy-duty MDF construction. Plus, stylish brushed aluminium laminate and a robust grill create the perfect balance of stunning aesthetics and practicality.


New 2nd generation Alpine SBR-S8D4.2 R-Series Subwoofers feature enhanced sound performance in an exciting new aesthetic. A larger motor structure featuring double-stacked neodymium magnets and an integrated faraday-ring results in a deeper, clearer and tighter bass while the all-new Kevlar-treated cone ensures this extra performance is reliable – even at higher volumes.

Quality and Performance unrivalled in the industry, Alpine’s new 2nd Generation R-Series continues to be the benchmark in sound quality for the audio enthusiast.

Award-winning SBR-S8D4, named INCAR SUBWOOFER OF THE YEAR – LOADED ENCLOSURE for 2017. Now Alpine has released a vs 2 that's even better!

Warranty as per Alpine's Terms and Conditions

Visit us at Sound Garage and get yours today!

  • 900W Peak Power
  • 300W RMS Power
  • High Amplitude Multi-Roll (HAMR) surround
  • Frequency Response: 28Hz – 400Hz
  • USA Designed Slot Ported Subwoofer Enclosure
  • Heavy Gauge Spring Terminals
  • Dimensions: (L x W x H cm) 49 x 29 x 16
  • SWR-823D Pre-installed
  • Grille Included
  • Subwoofer Size: 8″
  • Power Handling (RMS/Peak): 350W/1000W
  • Power Range (RMS): 150W-350W
  • Frequency Response (Hz): 28Hz-200Hz
  • Diaphragm Material: Kevlar-Reinforced Pulp Fiber
  • Diaphragm Design: 2-piece structural parabolic
  • Surround Material: Injection moulded Santoprene
  • Surround Design: High Amplitude Multi-Roll (Patent Pending)
  • Spider Material: Nomex
  • Spider Design: Progressive
  • Voice Coil Material: 180˚C High Temp Wire on Spiral Cut Aluminium Former
  • Voice Coil Design: 4-Layer Dual Voice Coil
  • Motor Structure Pole Geometry: Compound Radius Curve
  • Motor Structure Configuration: Integration Shorting Sleeve with Radial Vented VC Head Transfer
  • Magnet Material: High-Power Strontium Ferrite
  • Magnet Configuration: 6-Piece (8″) / 10-Piece (10″/12″) Radially Segmented, Double Stacked
  • Frame Material: Cast Aluminium
  • Frame Design: Single-Piece Casting with Airflow Management System
  • Terminals Layout: One sided
  • Terminals Design: Heavy Duty 8ga, Push with housing, Banana Sockets for VC Configuration Jumpers
  • Tinsel Leads Design: Reinforced Layer Spider Integration
  • Gasket Design: Concealed Mount Gasket System and Integrated Grill Ready


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