Lease for as low as $/week
1-4 DAYS DELIVERY
Sale
East Car Audio
ECA 2007–2026 Chevy Silverado & GMC Sierra Crew Cab Quad 8" 4-Hole 4x8 Ported Subwoofer Box | Front-Firing Under Seat Enclosure
$249.99
In Stock
Sold out
CODE:
Categories: all, Best Sellers!, CARPET DUAL, CARPET GMC/CHEVY, CARPET SPEAKER BOXES, Chevy/GMC box, SUBWOOFERS
100% ORIGINAL AND QUALITY
24 MONTHS GUARANTEE
- Description
- Shipping and Refund
ECA 2007–2026 Chevy Silverado & GMC Sierra Crew Cab 4-Hole 8" Ported Subwoofer Box | Front-Firing Under Seat Enclosure
Description
Upgrade your Chevy Silverado or GMC Sierra with the East Car Audio 4-hole 8" ported subwoofer box. Front-firing, under-seat design, Rhino bed liner finish, proudly made in Texas.
The Ultimate 4x8 Ported Subwoofer Box for Your Silverado or Sierra
Transform your truck's bass with the East Car Audio (ECA) 4-Hole 8" Ported Subwoofer Box, engineered specifically for 2007–2026 Chevrolet Silverado and GMC Sierra Crew Cab trucks. This custom-built enclosure fits neatly under the rear seat while delivering hard-hitting, front-firing bass without sacrificing passenger or cargo space.
Proudly built in Channelview, Texas, this enclosure features rugged 5/8" MDF construction, a durable Rhino bed liner finish, precision-tuned ports, and optimized internal air volume for outstanding low-frequency performance. It's designed for enthusiasts who want deep, clean bass with a factory-style fit.
Why You'll Love This Box
✅ Fits 2007–2026 Chevy Silverado & GMC Sierra Crew Cab
✅ Holds four 8-inch subwoofers
✅ Front-firing design for louder, cleaner bass
✅ Fits under the rear seat
✅ Heavy-duty Rhino bed liner coating
✅ Built from premium 5/8" MDF
✅ Tuned port design for powerful low-end response
✅ Proudly Made in Texas
Key Features
- Custom-fit for Chevy Silverado & GMC Sierra Crew Cab
- Fits (4) 8-inch subwoofers
- Front-firing ported enclosure
- Under-seat installation
- Heavy-duty 5/8" MDF construction
- Rhino bed liner finish for maximum durability
- Precision-tuned port
- Stainless-steel terminal hardware
- High-strength construction to minimize flex
- Built for high-power subwoofers
- Handmade by East Car Audio
Vehicle Fitment
Chevrolet Silverado Crew Cab
- 2007–2013
- 2014–2018
- 2019–2026 (New Body Style)
GMC Sierra Crew Cab
- 2007–2013
- 2014–2018
- 2019–2026 (New Body Style)
Fits Crew Cab models. Please verify your truck configuration before ordering.
Technical Specifications
| Specification | Details |
|---|---|
| Speaker Capacity | (4) 8" Subwoofers |
| Enclosure Type | Ported |
| Subwoofer Orientation | Front-Firing |
| Installation | Under Rear Seat |
| Material | 5/8" MDF |
| Finish | Rhino Bed Liner |
| Air Space | Approximately 0.8 ft³ per subwoofer chamber* |
| Mounting Depth | Up to approximately 11.25" |
| Tuning Frequency | Approximately 33 Hz |
| Made In | Most boxes are made in Texas, USA |
*Specifications are based on the current ECA design.
Built for Serious Bass
Unlike universal enclosures, this East Car Audio box is engineered specifically for GM Crew Cab trucks. The front-firing ported design maximizes bass output while maintaining excellent sound quality, making it ideal for everything from daily listening to high-output demo systems.
The Rhino bed liner coating not only gives the enclosure a rugged, premium appearance but also adds protection against scratches, moisture, and everyday wear.
Compatible with Many Popular 8" Subwoofers
Works with many leading brands, including:
- Sundown Audio
- Deaf Bonce
- DD Audio
- DS18
- Massive Audio
- PRV Audio
- Memphis Audio
- American Bass
- Skar Audio
- CT Sounds
- Kicker
Always verify your subwoofer's mounting depth and cutout diameter before ordering.
Perfect For
- Daily driver bass systems
- SQL (Sound Quality + Loudness) builds
- SPL truck systems
- Show trucks
- Work trucks
- Full custom audio installations
What's Included
- (1) East Car Audio 4-Hole 8" Ported Subwoofer Enclosure
- Installed Speaker Terminal
- Ready for Subwoofer Installation
Subwoofers, amplifiers, and wiring are sold separately.
Frequently Asked Questions
Will this fit my 2025 or 2026 Silverado or Sierra?
This enclosure is designed for 2007–2026 Chevy Silverado and GMC Sierra Crew Cab trucks. Always verify your cab configuration before ordering.
Is this box ported or sealed?
It is a ported enclosure tuned for stronger low-frequency output and greater efficiency.
How many subwoofers does it hold?
It is designed for four 8-inch subwoofers.
Does it fit under the rear seat?
Yes. The enclosure is specifically engineered for an under-seat installation while keeping a clean, factory-style appearance.
Is the enclosure carpeted?
No. This version features a durable Rhino bed liner finish for maximum durability and a rugged appearance.
Where is it made?
Every East Car Audio enclosure is proudly built in Channelview, Texas, USA.
Why Buy from East Car Audio?
East Car Audio specializes in custom truck audio solutions that are engineered for real-world performance. Every enclosure is built with precision and designed to maximize output while maintaining excellent fitment and durability.
When you buy from East Car Audio, you're getting:
- 🇺🇸 Proudly Made in Texas
- Premium craftsmanship
- Vehicle-specific fitment
- Fast shipping
- Expert customer support
- Products designed by truck audio enthusiasts
