SKU: 69742418170

Alpine SBR-S8D4.2

$179.97 $199.97
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Ships within 48 hours · Estimated delivery Jul 12 - Jul 17

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Description

Alpine SBR-S8D4.2R Series 8 Compact Subwoofer Features Fill 1 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 R2 W8D4 Pre installed Grille Included and Pre Installed Specifications Fill 1 Subwoofer Size: 8 Power Handling (RMS Peak): 350W 1000W Power Range (RMS): 150W 350W Frequency Response (Hz): 28Hz

R-Series 8” Compact Subwoofer


  • Features Fill 1

      • 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
      • R2-W8D4 Pre-installed
      • Grille Included and Pre-Installed

  • Specifications Fill 1

      • 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 molded 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

      ELECTRO-MECHANICAL PARAMETERS

      • Nominal Impedance: 2ohms+2ohms
      • Frequency Response: 28-200Hz
      • Sensitivity (SPL @ 1W/1m): 83.5dB
      • D.C Coil Resistance (Re): 1.85ohms +1.85ohms
      • Inductance (Le) 1kHz/20kHz: 0.87mH/0.30mH
      • Free Air Resonance (Fs): 38Hz
      • Equivalent Stiffness (Vas): 12L (0.42 ft³)
      • Mechanical Q (Qms): 7.8
      • Electrical Q (Qes): 0.55
      • Total Q (Qts): 0.50
      • Xmax10 (One-Way Xmax @ 10% Distortion): 14mm
      • Mechanical Excursion, Peak-to-Peak: 52mm
      • Gap Height (Hag): 10mm
      • Coil Height (Hvc): 29mm
      • Cone Area (Sd): 201 cm²
      • Voice Coil Diameter: 40mm (1.6″)
      • Magnet Weight: 52oz
    • Shipping Notes
    • Free Standard Shipping on $100+ Orders to the USA.
    • Except Preorder products are shipped in 48 hours.
    • Delivery to the USA:
    1. Standard Shipping : 3-10 business days
    • If time is of the essence, please consider selecting expedited delivery for faster service.
    Exchange/Return Notes
    • We offer a 30-day return/exchange service after receiving.
    • Final sale items are not eligible for returns or exchanges.
    • To process your return/exchange, please contact us at [email protected]
    • Please click here for more details>>> Return & Exchange Policy
    SKU: 69742418170

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    4.9 ★★★★★
    Based on 114 reviews
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    Product Reviews
    J
    Verified Purchase
    Judyxt
    Grantham, US
    ★★★★★ 5
    I use it to help me with the joystick
    Color: Squeaky-Multi Colors, Size: 2.0"(Small)-4 Pack
    These worked great for the joystick on my Jazzy Air 2 joystick have arthritis but with just one I can use it now.
    WAS THIS REVIEW HELPFUL?YesReportShare
    Reviewed in the United States on May 31, 2026
    L
    Verified Purchase
    Lisa M.
    Phoenix, US
    ★★★★★ 5
    Wonderful product
    Color: Regular-Orange, Size: 2.5"(Medium)-12 Pack
    Love these balls! They are very sturdy for dog chewers and retrieval.
    WAS THIS REVIEW HELPFUL?YesReportShare
    Reviewed in the United States on March 24, 2026
    P
    Verified Purchase
    Priara
    Louisville, US
    ★★★★★ 3
    Not as small as described
    Color: Squeaky-Multi Colors, Size: 2.0"(Small)-4 Pack
    Was disappointed with this product , as the reason for me ordering this product was so that I could gift to my little 6pound yorkie in an Easter basket , considering that my pet preference is SMALL balls and these were pretty much an average size ball. So she didn’t get much enjoyment out of them. Price was very fair , but money wasted overall because she doesn’t play with them.
    WAS THIS REVIEW HELPFUL?YesReportShare
    Reviewed in the United States on April 30, 2026
    D
    Verified Purchase
    Desertmouse
    Omaha, US
    ★★★★★ 5
    Dog likes them
    Color: Squeaky-Multi Colors, Size: 2.0"(Small)-12 Pack
    Dog approved
    WAS THIS REVIEW HELPFUL?YesReportShare
    Reviewed in the United States on May 11, 2026
    V
    Verified Purchase
    Verucat
    Louisville, US
    ★★★★★ 5
    Yes!
    Size: Medium
    Durable. Squeak doesn't last forever with my aggressive chewers but crinkle does. Best balls.
    WAS THIS REVIEW HELPFUL?YesReportShare
    Reviewed in the United States on September 28, 2025

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