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Ground Shaker  GS-GM28B New

Black 8" Dual Sealed Enclosure for 2014-2018, GMC Sierra Crew Cab

Item #99000

Condition:   Brand New

Product Highlights

  • Black 8"
  • Dual Sealed
  • Enclosure
  • 2014-2018
  • GMC Sierra Crew Cab

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

$280.00

Reg. Price $330.00  Save $50.00
  Free 2-Years Warranty Included!

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Ground Shaker Authorized Dealer

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Ground Shaker GS-GM28B Black 8" Dual Sealed Enclosure for 2014-2018, GMC Sierra Crew Cab

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" Black Dual Sealed Enclosure
  • • Owner's Manual
Ground Shaker
Explosive Bass, Compact Design, Built to Last

Unleash powerful, precise low-end with dual-chamber engineering that delivers clean, thunderous bass from every subwoofer. Its smart under-seat design maximizes cabin space while packing serious audio punch. Constructed from 5/8" high-density MDF with reinforced glue and Titebond silicone, this enclosure is built to withstand the rigors of the road and provide dependable, long-lasting performance.

Tight, Thunderous Bass Made Simple

Experience precision bass with fully sealed chambers that keep every note tight and free from distortion, delivering crystal-clear low-end no matter the volume. Dual binding posts make setup effortless, getting your subs connected quickly and securely. Combined with a smart down-firing design, this enclosure projects deep, rumbling lows that bring your music to life on every drive.

 

Ground Shaker
Ground Shaker
Built Tough, Sounds Unstoppable

Take your bass anywhere with a rugged, truck-ready enclosure wrapped in durable trunk liner carpet that stands up to scratches, spills, and everyday wear on American roads. Engineered with individual chambers, it delivers balanced, full-bodied bass across every music genre. Designed to accommodate large subwoofers, it keeps powerful drivers protected under your seat while maximizing performance and durability.


SPECIFICATIONS


  • Speaker Size : 8 Inches
  • Number Of Subwoofers : 2
  • Construction : 5/8 MDF
  • Volume : 1.45 Cu. Ft.
  • Enclosure Type : Sealed
  • Vehicle Make : GMC

FEATURES


Features:

  • Dual-Chamber Bass Explosion: Each subwoofer gets its own 0.73 ft³ chamber for precise, thunderous bass that hits hard and clean.
  • Under-Seat Space Maximizer: Designed to fit snugly under your rear seat, giving you maximum bass without stealing cabin room.
  • Built to Endure: Crafted from 5/8" high-density MDF with premium glue and Titebond silicone for long-lasting, road-ready durability.
  • Crystal-Clear Low-End: Fully sealed chambers deliver tight, distortion-free bass so every beat sounds perfect.
  • Two Terminals, One Easy Setup: Dual binding posts make connecting your subs quick and hassle-free.
  • Down-Firing Design for Maximum Impact: Optimized for low-frequency projection, giving your music that deep, rumbling presence.
  • Rugged, Truck-Ready Finish: Wrapped in durable trunk liner carpet to resist scratches, spills, and daily wear on American roads.
  • Engineered for Balanced Sound: Individual chambers ensure even bass response across all music genres.
  • Heavy-Duty Fit for Large Subwoofers: Supports wide magnet and basket subwoofers while keeping them protected under your seat.

 

Specifications:

  • Cutout Diameter: 7 1/8"
  • Air Volume: 1.45 cubic ft³
  • 2 Individual Chambers (0.73 cubic ft³ per subwoofer)
  • Mounting Depth: 6 1/2"
  • Height: 8"
  • Length: 49 1/2"
  • Depth: 16"
  • 5/8" High-Density MDF Wood
  • Carpeted with Durable Trunk Liner Finish
  • Sealed with High-Quality Titebond Silicone
  • Glued with High-Quality Titebond Wood Glue
  • 2 Binding Post Terminals
  • Fits Under the Rear Seat
  • Down-Firing
  • Subwoofers with Wide Magnets/Baskets May Not Fit
  • UPC:
  • Weight: 43
  • 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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