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Ground Shaker  GS-NP28B New

Black 8" Dual Ported Center Sub Box

Item #99321

Condition:   Brand New

Product Highlights

  • Black
  • 8"
  • Dual Ported
  • Center
  • Sub Box

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

$135.00

Reg. Price $185.00  Save $50.00
  Free 2-Years Warranty Included!

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Ground Shaker GS-WXP115B Black 8" Dual Ported Center Sub Box

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 Ported Center Sub Box
  • • Owner's Manual
Ground Shaker
37Hz Dual Slot Port Power in a Compact Design

Built for U.S. car audio enthusiasts who crave fast, tight bass response, this enclosure is precision-tuned at 37Hz to deliver energetic, punchy low-end performance for everyday listening. Its dual precision slot port system improves airflow efficiency, reduces distortion, and produces louder, cleaner bass output with impressive clarity. Designed with a 7 1/8” cutout, it’s perfect for compact subwoofer setups while still delivering strong, impactful low-frequency performance that hits far beyond its size.

Lightweight Power with Tight, Accurate Low-End Performance

Engineered for clean and controlled bass, this enclosure features an optimized 1.46 FT³ air chamber that enhances accuracy while delivering strong output efficiency and tight low-frequency response. Built from durable 5/8” high-quality MDF, it provides solid structural strength and reduced vibration for consistent performance even during heavy bass use. Despite its rugged construction, the lightweight 35 lb design makes installation quick and easy, offering the perfect balance of portability, durability, and sound quality.

 

Ground Shaker
Ground Shaker
Airtight Engineering with Pro-Grade Connectivity

Designed for a clean and professional install, this enclosure is wrapped in rugged trunk liner carpet that delivers a factory-style finish seamlessly blending into modern American vehicles. Its industrial sealing and bonding system uses premium Titebond silicone reinforced with Titebond wood glue, ensuring airtight construction for maximum bass efficiency and long-lasting durability. Equipped with dual spring-loaded terminals, it provides fast, secure, and reliable wiring connections built to support demanding high-performance audio systems with ease.


SPECIFICATIONS


  • Speaker Size : 8 Inches
  • Number Of Subwoofers : 2
  • Construction : 3/4 MDF
  • Volume : 3.35 Cu. Ft.
  • Enclosure Type : Ported

FEATURES


Features:

  • American-Style Tight Bass Tuning: Designed for U.S. car audio lovers who want fast, punchy bass response tuned at a sharp 37-Hz for energetic everyday listening.
  • Dual Slot Port Airflow System: Equipped with 2 precision slot ports that enhance air movement, reduce distortion, and deliver louder, cleaner bass output.
  • Compact High-Impact Subwoofer Design: Built for a 7 1/8" cutout, making it ideal for smaller sub setups while still producing powerful low-frequency performance.
  • Optimized 1.46 FT³ Air Chamber: Carefully engineered internal volume that improves bass accuracy, giving you tight response with strong output efficiency.
  • Durable 5/8” MDF Construction: Crafted from high-quality MDF wood for solid strength, reduced vibration, and consistent performance under heavy bass use.
  • Lightweight Yet Strong Build: Weighing only 35 lbs, this enclosure offers easy installation without sacrificing durability or sound quality.
  • Professional Trunk-Ready Finish: Wrapped in rugged trunk liner carpet for a clean, factory-style appearance that fits seamlessly into modern American vehicles.
  • Industrial Sealing & Bonding System: Fully sealed with high-quality Titebond silicone and reinforced with Titebond wood glue for airtight performance and long-lasting durability.
  • Dual Spring Terminal Connectivity: Features 2 spring-loaded terminals for fast, secure, and reliable wiring in high-performance audio systems.

 

Specifications:

  • Cutout Diameter: 13 3/4"
  • Air Volume: 3.35 FT³
  • Tuning Frequency: 32 Hz
  • Port Type: 1 Slot Port
  • Port Dimensions: H-14 3/4” x W-2 3/4” x L-24 1/2”
  • Mounting Depth: 13"
  • Height: 16 1/2"
  • Width: 17 3/4”
  • Length: 32 1/4"
  • Material: 3/4" High Quality MDF Wood
  • Finish: Durable Trunk Liner Carpet
  • Sealant: Titebond High Quality Silicone
  • Adhesive: Titebond Wood Glue
  • Terminal: 1 Spring Loaded Terminal
  • UPC:
  • Weight: 52
  • 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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