Dual 15” Chevy Avalanche Midgate Subwoofer Box (2002–2013) – Ported SPL Enclosure
Take your system to the next level with a dual 15” Chevy Avalanche subwoofer box engineered for serious bass output. Designed specifically for 2002–2013 Avalanche extended cab models, this midgate replacement enclosure maximizes airspace and tuning efficiency to deliver deep, aggressive low-end performance.
If you're chasing hard-hitting bass without building from scratch, this Avalanche midgate sub box provides a purpose-built solution. Its ported design tuned to 38Hz delivers powerful output across low frequencies, making it ideal for daily driving systems and high-output setups alike.
Built from full 3/4" high-grade MDF, this Chevy Avalanche subwoofer box is constructed for strength, durability, and acoustic precision. The bed liner polymer spray finish adds rugged protection against wear, moisture, and vibration—perfect for long-term use in demanding environments.
This enclosure replaces the factory midgate area, allowing you to run dual 15” subwoofers while maintaining a clean, integrated look. It’s also available in square Kicker-specific configurations, giving flexibility for different subwoofer setups.
With optimized internal volume and port tuning, this Avalanche subwoofer box improves output efficiency, reduces distortion, and enhances overall system performance. Whether you're upgrading your daily system or building a high-output bass setup, this enclosure delivers consistent, reliable results.
Key Features:
• Dual 15” Chevy Avalanche subwoofer box for 2002–2013 models
• Midgate replacement design for maximum usable space
• Ported enclosure tuned to 38Hz for deep, powerful bass
• 3/4" high-grade MDF construction for durability and performance
• Bed liner spray finish for rugged, long-lasting protection
• Available in square Kicker subwoofer configurations
• Made in the USA
Performance Advantage:
Unlike generic enclosures or DIY avalanche midgate sub box plans, this professionally engineered design ensures proper tuning, structural integrity, and optimized airflow. The result is louder output, cleaner bass, and better overall system efficiency without trial and error.
Upgrade Option – SMD TCR-1 Terminal Cup:
For high-power systems, upgrade to the SMD TCR-1 speaker terminal cup. It supports up to 2000W, offering significantly higher power handling than standard terminals while improving durability and connection reliability.
• Handles up to 2000W power
• Reinforced design prevents leaks and failure
• Stainless steel hardware for long-term durability
• High-strength, lightweight construction
Specifications:
Width: 54"
Front Height: 27"
Rear Height: 11.75"
Depth: 11.75"
Top/Bottom Depth: 15"
Mounting Depth: 11"
Cutout Diameter: 13.875"
Tuning Frequency: 38Hz
Weight: 85 lbs
Why This Enclosure Stands Out:
This Chevy Avalanche sub box is built for enthusiasts who want real performance without compromises. From its precision tuning to its rugged construction, every detail is designed to deliver stronger bass, better reliability, and a clean factory-style integration. Whether you're upgrading or building a full system, this enclosure provides the foundation for powerful, high-quality sound.
