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Ground Shaker  GS-JGMP212B

Black 12" Dual Ported Enclosure for 2007-2018 GMC Sierra Extended Cab (under rear seat behind the driver's side)

Item #98958

Condition:   Brand New

Product Highlights

  • 12" Dual Ported Enclosure
  • Black Finish
  • 2007–2018 GMC Sierra
  • Extended Cab
  • Under Rear Seat, Behind Driver's Side Install

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

$340.00

Reg. Price $420.00  Save $80.00
  Free 2-Years Warranty Included!
60 DAYS Returns Accepted.
FREE Lifetime Tech Support.
FREE Shipping (No Minimum).
60 DAYS Price change protection.

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Ground Shaker GS-JGMP212B Black 12" 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?
  • • 12" Dual Ported Enclosure
  • • Owner's Manual
Alpine_PWE-S8
Under-Seat Down-Firing Subwoofer Enclosure

Crafted from 5/8" high-quality MDF, this enclosure minimizes vibration for tight, precise bass. The rugged trunk-liner carpet finish protects the box while providing a clean, factory-style appearance. Sealed with premium Titebond silicone, it maintains proper internal air pressure for controlled, accurate low-end performance. Reinforced with high-strength Titebond wood glue, the enclosure ensures long-lasting structural integrity. Equipped with 2 binding post terminals, it delivers secure and reliable subwoofer connections. Designed to fit neatly behind the driver’s side rear seat, the down-firing configuration projects deep bass downward for immersive cabin sound. Truck Compatibility: Not suitable for 2007 Classic models.


SPECIFICATIONS


  • Speaker Size : 12 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: Sturdy construction for minimal vibration and precise bass response.
  • Durable Trunk-Liner Carpet Finish: Rugged carpet protects the enclosure while giving a clean, factory-style look.
  • Airtight Titebond Silicone Seal: Ensures proper internal air pressure for tight, controlled bass.
  • Premium Wood Glue Assembly: Reinforced with Titebond for long-lasting structural integrity.
  • 2 Binding Post Terminals: Secure, reliable connections for your subwoofers.
  • Under-Seat Fitment: Specifically designed to fit behind the driver’s side rear seat.
  • Down-Firing Configuration: Optimized to project deep bass downward into the cabin.
  • Truck Compatibility: Will not fit 2007 Classic models.

 

Specifications:

  • Cutout Diameter: 11 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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