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PCH Custom Audio  2007-2018 Chevy Silverado Extended Cab Single 8” 8W1v3-4 Bass Package New

GS-JCHV18B Black 8" Single Sealed Sub Box, Fits 2007-2018 Chevy Silverado Extended Cab + 8W1v3-4 W1 v3 Series 8" 300W Peak Power Handling at 4 Ohms, Single Voice Coil Component Car Subwoofer

Item #99447

Condition:   Brand New

Product Highlights

  • GS-JCHV18B
  • Single 8"
  • Sealed Box
  • Extended Cab
  • Silverado Fit
  • Black Finish
  • 8W1v3-4 W1 v3 Series
  • 300W Peak Power Handling
  • 4 Ohms
  • Single Voice Coil

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

$469.95

Reg. Price $659.99  Save $190.04
Add Extended Warranty
  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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This exclusive package is brought to you by Onlinecarstereo. We have put together this bundle to kickstart your vehicle to the path of excellent car audio.

Ground Shaker GS-JCHV18B Black 8" Single Sealed Sub Box, Fits 2007-2018 Chevy Silverado Extended Cab + JL Audio 8W1v3-4 W1 v3 Series 8" 300W Peak Power Handling at 4 Ohms, Single Voice Coil Component Car Subwoofer


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We are an 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?
  • • GS-JCHV18B 8" Single Sealed Sub Box
  • • GS-JCHV18B Owner's Manual
  • • 8W1v3-4 (1) 8" Single 4-ohm voice coil subwoofer
  • • 8W1v3-4 Black plastic trim ring (installed)
  • 8W1v3-4 Owner's Manual
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Big Bass Without Giving Up Your Space

The Ground Shaker GS-JCHV18B is the perfect solution for truck owners who want serious bass without sacrificing valuable cabin space. Designed to fit neatly under the rear seat behind the driver’s side, this enclosure keeps your setup clean, hidden, and practical while still delivering the low-end punch your system deserves. Its down-firing design not only protects the subwoofer from daily wear and tear, but also helps produce deeper, tighter bass that fills the cabin with smooth low-frequency response.

Built Tough for Real Car Audio Performance

This enclosure is built from durable 5/8" high-quality MDF wood, giving it the strength and rigidity needed for cleaner, more accurate bass performance. With 0.68 ft³ of optimized air space, it’s tuned to help your subwoofer perform efficiently without sounding muddy or weak. The enclosure supports subs with a 7 1/8" cutout and up to 6" mounting depth, making it compatible with a wide range of popular subwoofers. Ground Shaker also uses premium Titebond wood glue and silicone sealing to keep the box air-tight and solid, even during heavy bass sessions.

 

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Compact Power – Perfect Fit Sub Box

Wrapped in a durable trunk liner carpet, the GS-JCHV18B looks right at home inside your truck while resisting scratches and wear from everyday use. The compact dimensions make installation simple, and the sturdy 22 lb build helps reduce unwanted vibrations for cleaner sound. A reliable binding post terminal provides secure wiring connections, making your install easier and more dependable. If you want strong bass in a stealthy, truck-friendly setup, this enclosure gets the job done without taking over your interior.

 

 

Big Bass in Tight Spaces

The 8W1v3-4 delivers powerful JL Audio bass where traditional subs won’t fit, bringing legendary W7 technologies—advanced cone bonding, precise motor assembly, and optimized suspension—to compact vehicles. Engineered for impressive output and accurate sound at moderate power levels, it’s perfect for small enclosures in trucks, sports cars, and compact vehicles.

 

 

Clean, Powerful Bass

DMA-optimized motor and suspension deliver tight, articulate bass with minimal distortion across all power levels. The mica-filled polypropylene cone with rubber surround and aluminum dust cap ensures strong, crisp lows and features a stylish embossed JL Audio logo.

 

 

Compact, Customizable, Powerful

With a shallow 3-7/8" mounting depth, the 8W1v3-4 fits compact spaces and small enclosures from 0.35cuft. The removable trim ring can be painted for a custom look, and optional grille inserts add style and protection. Compatible with sealed or ported enclosures and 50–100W RMS amplifiers, it delivers flexible, powerful bass for budget-friendly setups.

Compact, Affordable, Reliable

Optimized for small vehicles and tight spaces, the 8W1v3-4 delivers impressive low-end performance without the bulk of larger subs. JL Audio engineering ensures dependable, high-quality sound at an accessible price.

 

 

Learn how to wire subwoofers


SPECIFICATIONS


  • Vehicle Make : Chevrolet

FEATURES


GS-JCHV18B Black 8" Single Sealed Sub Box, Fits 2007-2018 Chevy Silverado Extended Cab

 

Features:

  • Vehicle-Specific Under Seat Design: Engineered to fit under the rear seat behind the driver’s side for a clean, space-saving bass solution.
  • Down-Firing Enclosure Configuration: Down-firing design helps protect the subwoofer while enhancing low-frequency performance and bass response.
  • Optimized Internal Air Volume: Features 0.68 ft³ of internal air space for balanced and efficient subwoofer performance.
  • Subwoofer Compatibility: Supports subwoofers with a 7 1/8" cutout diameter and up to 6" mounting depth.
  • Compact Truck-Friendly Dimensions: Designed with a low-profile structure measuring 9 1/2" front height, 7 1/2" rear height, 29 1/2" length, and 13 1/2" depth.
  • Heavy-Duty MDF Construction: Built from durable 5/8" high-quality MDF wood for enhanced enclosure rigidity and improved sound performance.
  • Premium Trunk Liner Finish: Wrapped in a durable carpeted trunk liner material for a clean appearance and added resistance to wear.
  • Air-Tight Sealed Design: Sealed with high-quality Titebond silicone to reduce air leaks and maintain accurate bass response.
  • Strong Wood Bonding: Constructed using premium Titebond wood glue for superior durability and long-lasting structural integrity.
  • Reliable Speaker Connection: Equipped with a binding post terminal for secure and dependable speaker wire connections.
  • Solid & Durable Build: Weighs 22 lbs., providing a sturdy enclosure platform that minimizes unwanted vibration.
  • Installation Note: Not compatible with 2007 Classic models.

 

Specifications:

  • Cutout Diameter: 7 1/8"
  • Air Volume: 0.68 ft³
  • Weight: 22 lbs.
  • Mounting Depth: 6"
  • Front Height: 9 1/2"
  • Rear Height: 7 1/2"
  • Length: 29 1/2"
  • Depth: 13 1/2"
  • Constructed with 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
  • 1 Binding Post Terminal
  • Fits under rear seat behind the driver’s side
  • Down-firing design
  • Will not fit 2007 Classic

 

 

8W1v3-4 W1 v3 Series 8" 300W Peak Power Handling at 4 Ohms, Single Voice Coil Component Car Subwoofer

 

Features:

  • Legendary JL Audio Engineering: The 8W1v3-4 subwoofer brings JL Audio’s renowned performance to tight spaces where traditional subs cannot fit, giving you powerful bass in compact vehicles.
  • Trickle-Down Technology: Incorporates patented features from the legendary W7 series, including advanced cone bonding, motor assembly precision, and sophisticated suspension systems for linear, dependable output.
  • Engineered for Performance: Provides impressive output, accuracy, and sound quality at moderate power levels, ideal for small enclosures in trucks, sports cars, or compact vehicles.
  • Dynamic Motor Analysis (DMA) Optimized Speakers: Ensures linear motor force across a wide range of excursions and power levels, delivering tight, clean, and articulate bass with minimal distortion.
  • Polypropylene Cone Technology: Mica-filled polypropylene cone with a durable rubber surround and aluminum dust cap delivers crisp, strong bass while standing out visually with an embossed JL Audio logo.
  • Shallow Mounting Depths: At only 3-7/8 inches deep, the sub fits into compact environments and works optimally in small enclosures starting at just 0.35 cubic feet.
  • Custom Accents: The removable trim ring allows for paint customization to match your installation, and optional grille inserts (sold separately) add protection and style.
  • Powerfully Adaptable: Compatible with sealed or ported enclosures and amplifiers ranging from 50-100 watts RMS, making it perfect for budget-friendly setups.
  • Solid Bass for Compact Boxes: Optimized for small vehicles and hard-to-fit spaces, delivering impressive low-end performance without the bulk of larger subwoofers.
  • Affordable and Reliable: Offers JL Audio quality and engineering at an accessible price point, ensuring dependable performance without breaking the bank.

 

Specifications:

  • Size: 8"
  • Impedance: 4 Ohms
  • Cone Material: Mica-filled polypropylene
  • Surround Material: Rubber
  • Basket Material: N/A
  • Grille: None included
  • Free-Air Capability: No
  • Dual Voice Coil: No
  • Sensitivity: 84.8 dB at 1 watt
  • Frequency Response: 25 – 250 Hz
  • Max RMS Power Handling: 150 watts
  • Peak Power Handling: 300 watts
  • Top Mount Depth: 3 7/8 inches
  • Cutout Diameter: 6 15/16 inches
  • Frame Width/Length: 8.533 inches
  • Vas (liters): 19.26
  • Fs (Hz): 35.4
  • Qts: 0.418
  • Xmax (mm): 8
  • Ideal Sealed Box Volume: 0.35 cubic feet
  • Ideal Ported Box Volume: 0.5 cubic feet
  • Minimum Ported Box Volume: 0.4 cubic feet
  • Maximum Ported Box Volume: 0.65 cubic feet
  • Port Diameter: 2 inches
  • Port Length: 10 inches
  • UPC:
  • Weight: 32
  • 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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