Alpine R2-W8D4

$300.00

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

Maximum bass output.ย Alpine’s R2-W8D4 8″ subwoofer delivers powerful, precise bass that combines both accurate response and impressive output, particularly for its compact size. Drawing on over 40 years of audio engineering expertise, Alpine has designed this high-performance subwoofer with a new motor structure featuring double-stacked magnets that produces deeper bass with tighter sound control.

This premium subwoofer features a durable Kevlar-reinforced pulp cone with a High Amplitude Multi-Roll (HAMR) Santopreneโ„ข rubber surround that allows for extreme excursion while maintaining control. The oversized poly ceramic dust cap adds rigidity to keep the sound tight even at high output levels, making this the perfect choice for bass enthusiasts who want quality bass but have limited installation space.

Product Highlights

  • Type:ย 8″ subwoofer with dual 4-ohm voice coils
  • Power Handling:ย 150-350 watts RMS (175 watts per coil)
  • Peak Power:ย 1,000 watts
  • Frequency Response:ย 30-200 Hz
  • Sensitivity:ย 83.7 dB
  • Voice Coil Configuration:ย 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 Santopreneโ„ข 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:ย 150-350 watts RMS (175 watts per coil)
  • Peak Power Handling:ย 1,000 watts
  • Frequency Response:ย 30-200 Hz
  • Sensitivity:ย 83.7 dB at 1 watt
  • Impedance:ย 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:ย 8.288 inches
  • Cutout Diameter:ย 6-15/16 inches
  • Mounting Depth:ย 4.631 inches (top-mount)
  • Mounting Height:ย 0.875 inches

Construction Details

  • Cone Material:ย Kevlar-reinforced pulp (two-piece structural parabolic design)
  • Surround:ย HAMR (High Amplitude Multi-Roll) Santoprene rubber
  • Dust Cap:ย Oversized inverted polypropylene/ceramic composite
  • Basket/Frame:ย Aluminum
  • Magnet Structure:ย Double-stacked magnets
  • Terminals:ย 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″ ร— 1″ ร— 17.5″)
    • Maximum Volume: 0.75 cubic feet
    • Recommended Tuning Frequency: 39 Hz

Wiring Options

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