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Ground Shaker  GS-OGM28B

8" Black Dual Sealed Sub Box for 1988-1998 GMC Sierra Ext-Cab

Item #99002

Condition:   Brand New

Product Highlights

  • 8 inch subwoofer
  • dual sealed box
  • GMC Sierra sub
  • Ext-Cab audio enclosure
  • black bass box

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

$310.00

Reg. Price $390.00  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 Authorized Dealer

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Ground Shaker GS-OGM28B 8" Black Dual Sealed Sub Box for 1988-1998 GMC Sierra Ext-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 Sub Box
  • • Owner's Manual
Kicker_KM
Dual Sub Power, Compact Fit

This dual subwoofer enclosure features a 7 1/8" cutout diameter, engineered for a precise and professional fit in your vehicle. With a total air volume of 1.45 ft³ (0.73 ft³ per sub) and a sturdy 45 lbs design, it delivers deep, powerful bass without taking up extra space. The 6" mounting depth (with a 5 1/2” magnet diameter) ensures easy installation while maximizing sound performance for every ride.

Spacious Design, Maximum Bass

Measuring 11 3/4" in height and 57 1/4" in length, this dual sub enclosure fits seamlessly under your vehicle’s rear seat while maximizing internal space. Its tapered design—11" top depth and 16 1/2" bottom depth—optimizes airflow for deeper, richer bass. Built for both performance and convenience, it delivers powerful sound without compromising interior space.

 

Kicker_KM
Kicker_KM
Built Tough, Sound Perfect

Constructed from 5/8" high-quality MDF wood, this dual subwoofer enclosure provides unmatched durability and long-lasting performance. Its rugged trunk liner carpet finish, combined with Titebond silicone sealing and wood glue, creates an airtight design for superior bass response. Featuring 2 binding post terminals, it ensures secure connections and consistently powerful, crystal-clear sound.


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


Specifications:

  • Cutout Diameter: 7 1/8"
  • Total Air Volume: 1.45 ft³
  • Volume Per Subwoofer: 0.73 ft³
  • Weight: 45 lbs
  • Mounting Depth: 6" (with a 5 1/2” magnet diameter)

 

Dimensions:

  • Height: 11 3/4"
  • Length: 57 1/4"
  • Top Depth: 11"
  • Bottom Depth: 16 1/2"

 

Construction:

  • 5/8" high-quality 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

 

Installation:

  • Fits under rear seat
  • Forward-firing design
  • Requires removal of jack kit
  • UPC:
  • Weight: 45
  • 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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