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Ground Shaker  GS-JGMP28B New

Black 8" Dual Ported Enclosure for 2007-2018 GMC Sierra Extended Cab (under rear seat behind the driver's side)

Item #98949

Condition:   Brand New

Product Highlights

  • fits **two 8" subwoofers**
  • ported enclosure design for deeper, louder, and more efficient bass output
  • vehicle-specific fit for **2007–2018 GMC Sierra Extended Cab**
  • compact **under-rear-seat installation** behind driver’s side to save cabin space
  • carpeted black finish for a clean, factory-style appearance

  Free 2-Years Warranty Included!
60 DAYS Returns Accepted.
FREE Lifetime Tech Support.
FREE Shipping (No Minimum).
60 DAYS Price change protection.

$300.00

Reg. Price $400.00  Save $100.00
  Free 2-Years Warranty Included!

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Ground Shaker GS-JGMP28B Black 8" Dual Ported Enclosure for 2007-2018 GMC Sierra Extended Cab (under rear seat behind the driver's side)

We are an Ground Shaker authorized dealer so you get up-to-date, fully warrantied products. Shipping is free to the lower 48 states on everything you order!

What's Inside?
  • • 8" Dual Ported Enclosure
  • • Owner's Manual
Alpine_PWE-S8
Under-Seat Down-Firing Subwoofer Enclosure

Built from 5/8" high-quality MDF, this enclosure reduces vibration for tight, accurate bass performance. The durable trunk-liner carpet finish protects the box while maintaining a clean, factory-style appearance. Sealed with premium Titebond silicone, it ensures proper internal air pressure for controlled low-frequency output, while high-strength Titebond wood glue provides long-lasting structural integrity. Equipped with 2 binding post terminals, it offers secure and reliable connections for your subwoofers. Designed to fit behind the driver’s side rear seat, the down-firing design directs bass toward the floor for deep, impactful sound. Truck Compatibility: Not compatible with 2007 Classic models.


SPECIFICATIONS


  • Speaker Size : 8 Inches
  • Number Of Subwoofers : 2
  • Construction : 5/8 MDF
  • Volume : 1.25 Cu. Ft.
  • Enclosure Type : Ported
  • Vehicle Make : GMC

FEATURES


Features:

  • 5/8" High-Quality MDF Wood: Durable construction reduces vibration for tight, accurate bass.
  • Durable Trunk-Liner Carpet Finish: Protects the enclosure while maintaining a clean, factory-style look.
  • Airtight Titebond Silicone Seal: Ensures proper internal air pressure for controlled low-frequency performance.
  • Premium Wood Glue Assembly: Built with high-strength Titebond for long-lasting durability.
  • 2 Binding Post Terminals: Provide secure and reliable connections.
  • Under-Seat Fitment: Designed to fit behind the driver’s side rear seat.
  • Down-Firing Design: Delivers deep, impactful bass directed toward the floor.
  • Truck Compatibility: Will not fit 2007 Classic models.

 

 

Specifications:

  • Cutout Diameter: 7 1/8"
  • Air Volume: 1.25 ft³
  • Tuning Frequency: 36 Hz
  • Port: 1 Slot Port (H-1.5” W-5” L-9”)
  • Weight: 37 lbs
  • Mounting Depth: 6 1/2"
  • Front Height: 9 1/4"
  • Rear Height: 7 1/4”
  • Length: 55 1/2"
  • Depth: 13 1/2"
  • UPC:
  • Weight: 37
  • Authorized Internet Dealer
Warranty: 2 Year(s) Warranty.
This item is accompanied by a manufacturer's warranty. If it is found to be defective, it may be returned to OnlineCarstereo.com for replacement within 2 Year(s) from the original date of purchase with proper return authorization.

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