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Ground Shaker  GS-GMTW3212B New

Black 12" Dual Sealed Tw3 Enclosure for 2014-2018, GMC Sierra Crew Cab

Item #99040

Condition:   Brand New

Product Highlights

  • Black 12"
  • Dual Sealed
  • Tw3 Enclosure
  • for 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.

$315.00

Reg. Price $365.00  Save $50.00
  Free 2-Years Warranty Included!

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Ground Shaker GS-GMTW3212B Black 12" Dual Sealed Tw3 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?
  • • 12" Black Dual Sealed Tw3 Enclosure
  • • Owner's Manual
Ground Shaker
Command the Road with Deep, Controlled Power

Take your sound system to the next level with hard-hitting, authoritative bass that turns every drive into a powerful audio experience. Engineered with precision-tuned dual chambers, this setup delivers tight, responsive lows with professional-level clarity. Its slim, space-efficient design lets you run larger subwoofers in tighter truck interiors without sacrificing performance, giving you the perfect balance of power, control, and fit.

Smart Fit, Serious Bass Power

Upgrade your ride with a sleek design that tucks neatly under your rear seat, keeping your cabin open and ready for anything. Built to handle the demands of the road, its reinforced construction stands strong against heat, vibration, and long hauls without compromising performance. The down-firing setup harnesses your truck’s floor to amplify every low note, delivering deeper, richer bass that transforms every drive into an immersive sound experience.

 

Ground Shaker
Ground Shaker
Tough Style, Precision Sound

Bring together rugged durability and refined performance with a finish built to handle tools, cargo, and the daily grind without losing its sharp look. Inside, carefully balanced airspace ensures each subwoofer delivers smooth, consistent bass across every track, giving your system the clarity and punch it needs to stand out on every drive.


SPECIFICATIONS


  • Speaker Size : 12 Inches
  • Number Of Subwoofers : 2
  • Construction : 5/8 MDF
  • Volume : 1.28 Cu. Ft.
  • Enclosure Type : Sealed
  • Vehicle Make : GMC

FEATURES


Features:

  • Low-End Authority Redefined: Feel every beat hit harder with deep, commanding bass that transforms your daily drive into a full-on sound experience.
  • Dual-Zone Bass Engineering: Separate chambers are tuned to deliver sharper response and tighter punch, giving your system pro-level clarity.
  • Slim Fit, Big Sound: Designed with a shallow mounting depth so you can run larger subs in tighter truck spaces without compromise.
  • Cabin-Friendly Design: Slides cleanly under the rear seat, keeping your interior open, functional, and ready for passengers or gear.
  • Road-Tested Toughness: Built from thick MDF and reinforced with premium adhesives to handle heat, vibration, and long highway miles.
  • Floor-Loaded Bass Effect: Down-firing design uses your truck’s floor to amplify low frequencies for a deeper, richer output.
  • Clean Look, Hard Use Ready: Finished in rugged trunk liner carpet that stands up to tools, cargo, and everyday abuse.
  • Even Power Distribution: Each subwoofer gets properly matched internal airspace for consistent, balanced bass across every track.

 

Specifications:

  • Cutout Diameter: 11 5/8"
  • Air Volume: 1.28 Cubic Ft³
  • Chambers: 2 Individual Chambers
  • Volume Per Subwoofer: 0.64 Cubic Ft³
  • Mounting Depth: 3 3/4"
  • Height: 8”
  • Length: 49 1/2"
  • Depth: 16"
  • Material: 5/8" High-Density MDF Wood
  • Finish: Durable Trunk Liner Carpet
  • Sealant: High-Quality Titebond Silicone
  • Glue: High-Quality Titebond Wood Glue
  • Terminals: 2 Binding Post Terminals
  • Placement: Fits Under Rear Seat
  • Orientation: Down Firing
  • UPC:
  • Weight: 41
  • 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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