(2) ALPINE S-W8D2 8" 900 Watt Car Audio Subwoofers+Vented Sub Box Enclosure

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Product Description
Package Includes:
  • (2) Alpine S-W8D2 8" 900 Watt Car Audio Subwoofers DVC Dual 2-Ohm Sub
  • (1) Rockville RQB8 Dual 8" Vented Subwoofer Sub Box Enclosure Finished w/Bed Liner
  • 20 Drywall Wood Screws (Wood screws are the type of screws; the screws are actually made of metal)
  • 20 Feet of 14 AWG Blue Speaker Wire
  • 4 Spade Terminals

Description of S-W8D2:

The S-Series subwoofers are designed with increased bass output and installation versatility

Don’t think you have room for a subwoofer? Think again. The new S-W8D2 and S-W8D4 8” S-Series subwoofers have a shallow mounting depth of just 3-3/4” and can be used in a sealed box enclosure as small as .15 cubic foot. It is perfect for under seats, behind rear bench seats in trucks, or even in some door applications.

The 8” S-Series subwoofers are engineered with an improved voice coil allowing the woofer to benefit from it's power rating of 300 watts.

Each S-Series subwoofer uses a custom-stamped steel frame. These high-strength frames were designed to withstand the rigors of the improved S-Series motor. They have frame leg vents as well as a vented back plate to help cool the subwoofer voice coil and motor parts, plus a shallow design to help fit in smaller spaces.

The push-type insert terminals help reduce the installation time of the S-Series subwoofers. Just strip the speaker insulation at the wire end, then insert the bare wire into the hole of the spring-loaded push terminal.

The S-Series subwoofers use two strontium ferrite magnets stacked together, for increased motor strength and excursion which ultimately leads to more bass output.

The S-Series subwoofers have concealed mount gaskets, creating a clean, finished appearance for any vehicle.

All S-Series subwoofers are compatible with optional grilles (sold separately) to provide added protection to the cone. The grilles feature a mesh design with a S-Series logo badge. KTE-8G: For 8” S-Series Subwoofers


  • ALPINE S-W8D2 8" 900 Watt Car Audio Subwoofer DVC Dual 2-Ohm Sub
  • Speaker Rating:
  • Max RMS Power Capacity: 300W RMS
  • Peak Power Capacity: 900W Peak Power
  • 8” 2O+2O Subwoofer
  • High Strength Custom Steel Frame
  • Great complement to V-Power Amplifiers
  • Frequency Response: 34Hz - 200Hz
  • Mounting Depth 3-3/4”
  • Cutout diameter: 6-7/8"
  • Sensitivity: 83dB
  • Recommended Sealed Box: 0.30 cubic foot (gross volume)
  • Recommended Vented Box: 0.71 cubic foot (gross volume), 7” x 0.75” vent area, 15.5” vent length

Recommended Enclosure Specifications:

  • Minimum Sealed Box Volume 0.15 cubic feet
  • Maximum Sealed Box Volume 0.5 cubic feet
  • Minimum Ported Box Volume 0.35 cubic feet
  • Maximum Ported Box Volume 0.7 cubic feet
  • Top-Mount Depth 3-3/4"
  • Cutout Diameter 6-7/8"

Features of RQB8:

  • Rockville RQB8 Dual 8" Vented Subwoofer Enclosure Finished w/ Bed Liner
  • Finished with Durable Bed Liner
  • 3/4" MDF
  • High Quality Spring Loaded Terminals
  • Air Space: 1.0 Cubic Feet (per sub)
  • Product Dimensions (H x W x D): 13" x 28" x 13" inches
  • Tuning Frequency: 40 hZ

Complete Dual Subwoofer Enclosure Installation Kit!


  • 20 Drywall Wood Screws (Wood screws are the type of screws; the screws are actually made of metal)
  • 20 Feet of 14 AWG Blue Speaker Wire
  • 4 Spade Terminals

This accessory package includes everything you need to install two subwoofers into an enclosure, and wire your enclosure to your amplifier. This package is a top of the line accessory package which we put together and tested.

The drywall wood screws were hand selected by our installation experts because they drill into the enclosure very cleanly, without chipping the enclosure. The speaker wire is 14 gauge. This is way better than using 16 gauge. You can be 100 % sure that your enclosure will have a clean signal to the amplifier with this top of the line speaker wire. These spade terminals have also been hand selected by our installation experts to make the internal wiring simple, secure, and to run the audio signal cleanly.

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