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Ground Shaker  GS-FLGMP28B

Black 8" Dual Ported Enclosure for 2019-2026 GMC Sierra Double & Crew-Cab (under rear seat)

Item #99021

Condition:   Brand New

Product Highlights

  • 8" Dual Ported Enclosure
  • Black Finish
  • 2019–2026 GMC Sierra
  • Double & Crew-Cab
  • Under Rear Seat Install

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

$360.00

Reg. Price $440.00  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-FLGMP28B Black 8" Dual Ported Enclosure for 2019-2026 GMC Sierra Double & Crew-Cab (under rear seat)

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 Forward-Firing Subwoofer Enclosure

 

Built from 5/8" high-quality MDF, this enclosure provides strong, rigid construction to minimize vibration and deliver clean, distortion-free bass. Wrapped in durable trunk-liner carpet, it protects the enclosure while maintaining a sleek, factory-style appearance. An airtight Titebond silicone seal ensures precise low-frequency response, and high-strength Titebond wood glue guarantees long-lasting structural integrity. Equipped with 2 spring-loaded terminals, it offers secure and reliable connections for your subwoofer. Designed for under-seat installation, its forward-firing design efficiently projects bass into the cabin for optimal sound coverage.

 


SPECIFICATIONS


  • Speaker Size : 8 Inches
  • Number Of Subwoofers : 2
  • Construction : 5/8 MDF
  • Volume : 2.50 Cu. Ft.
  • Enclosure Type : Ported
  • Vehicle Make : GMC

FEATURES


Features:

  • 5/8" High-Quality MDF Wood: Strong, rigid construction for clean, distortion-free bass.
  • Durable Trunk-Liner Carpet Finish: Protects the enclosure and gives a sleek, factory-style look.
  • Airtight Titebond Silicone Seal: Ensures precise low-frequency response.
  • Premium Wood Glue Assembly: Built for long-lasting structural strength.
  • 2 Spring-Loaded Terminals: Secure and reliable connections for your subwoofer.
  • Under-Seat Fitment: Designed to fit neatly under the rear seat.
  • Forward-Firing Design: Directs sound forward for optimal cabin bass coverage.

 

Specifications:

  • Cutout Diameter: 7 1/8" 
  • Air Volume: 2.50 ft³
  • Tuning Frequency: 32 Hz
  • Slot Port: 1 (H-4” W-7” L-25”)
  • Port Area: 28 in²
  • Weight: 58 lbs
  • Mounting Depth: 7 1/4" (with 6” magnet diameter)
  • Front Baffle Thickness: 1 1/4"
  • Front Height: 9 3/4”
  • Rear Height: 6 1/2"
  • Length: 53"
  • Depth: 17"
  • UPC:
  • Weight: 58
  • 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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