Alpine R2-W8D4

$300.00

R Series 8″ subwoofer with dual 4-ohm voice coils

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Product Highlights

  • Type: 8″ subwoofer with dual 4-ohm voice coils
  • Power Handling: 150-350 watts RMS (175 watts per coil)
  • Peak Power: 1,000 watts
  • Frequency Response: 30-200 Hz
  • Sensitivity: 83.7 dB
  • Voice Coil Configuration: Dual 4-ohm (can be wired for 2-ohm or 8-ohm loads)

Key Features

  • Premium Cone Construction:
    • Kevlar-reinforced pulp cone for strength and natural sound
    • HAMR Santoprene™ rubber surround allows extreme excursion
    • Oversized poly ceramic dust cap increases rigidity
  • Advanced Motor Design:
    • Double-stacked magnets for deeper bass
    • Compound Radius Curve pole geometry ensures symmetrical magnetic field
    • Progressive spider with reinforced layer tinsel leads
  • Flexible Installation:
    • Works well in sealed or ported enclosures
    • Compact size fits in space-limited applications
    • Dual voice coils for system wiring flexibility
    • Spring-loaded terminals accept up to 12-gauge wire

Package Contents

  • One 8″ dual 4-ohm voice coil subwoofer
  • Plastic trim ring
  • Two 4.5″ jumper wires with banana connectors
  • Installation documentation

Power & Performance

  • Power Handling: 150-350 watts RMS (175 watts per coil)
  • Peak Power Handling: 1,000 watts
  • Frequency Response: 30-200 Hz
  • Sensitivity: 83.7 dB at 1 watt
  • Impedance: Dual 4-ohm voice coils (configurable for 2-ohm or 8-ohm loads)
  • Thiele/Small Parameters:
    • Vas: 10.5 liters
    • Fs: 43 Hz
    • Qts: 0.53
    • Xmax: 12mm

Physical Dimensions

  • Frame Diameter: 8.288 inches
  • Cutout Diameter: 6-15/16 inches
  • Mounting Depth: 4.631 inches (top-mount)
  • Mounting Height: 0.875 inches

Construction Details

  • Cone Material: Kevlar-reinforced pulp (two-piece structural parabolic design)
  • Surround: HAMR (High Amplitude Multi-Roll) Santoprene rubber
  • Dust Cap: Oversized inverted polypropylene/ceramic composite
  • Basket/Frame: Aluminum
  • Magnet Structure: Double-stacked magnets
  • Terminals: Spring-loaded posts (accept up to 12-gauge wire, pin connectors, or banana plugs)

Enclosure Recommendations

  • Sealed Box:
    • Minimum Volume: 0.2 cubic feet
    • Ideal Volume: 0.3 cubic feet
    • Maximum Volume: 0.5 cubic feet
  • Ported Box:
    • Minimum Volume: 0.3 cubic feet
    • Ideal Volume: 0.73 cubic feet with slot port (8″ × 1″ × 17.5″)
    • Maximum Volume: 0.75 cubic feet
    • Recommended Tuning Frequency: 39 Hz

Wiring Options

  • Parallel Wiring: 2-ohm load (using included jumpers)
  • Series Wiring: 8-ohm load (using included jumpers)
  • Note: Confirm amplifier compatibility when wiring for lower impedance
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