2014-2018 Chevy Silverado Crew Cab Under-Seat Single 12" Sub Box + Harmony Audio HA-A122 12" Alloy Subwoofer

Package includes one custom-fit single 12" sealed subwoofer enclosure designed for 2014-2018 Chevy Silverado Crew Cab trucks and one Harmony Audio HA-A122 Alloy Series 12" subwoofer (Dual 2 Ohm). The enclosure sits beneath the rear seat with the driver firing downward for a clean, factory-style install. Enclosure details: - Vehicle fitment: 2014-2018 Chevy Silverado Crew Cab Truck - Type: Custom single 12" sealed sub box (installs under rear seat, subs fire downward) - Mounting Depth: 6-1/2" - Air Space (sealed): 0.74 Cubic Feet - Construction: High quality MDF covered in black carpet - Terminal: High Quality Twist Knob / Banana Plug Terminal Cup (Bare Wire 'up to 10GA') - Overall dimensions: 24-3/4" L x 16-1/2" W x 9-3/4" H Harmony Audio HA-A122 12" Alloy Series subwoofer specifications: - Power handling: Peak 1000 watts / RMS 500 watts - Sensitivity: 87 dB - Frequency response: 25 Hz - 500 Hz - Mounting depth: 6" - Mounting cutout diameter: 11 1/8" - Recommended sealed box volume: Min 1.65 cu ft — Max 3.72 cu ft - Recommended vented box volume: Min 2.02 cu ft — Max 2.72 cu ft - Design features: Dual 2 Ohm voice coils, aluminum alloy lightweight cone, butyl rubber surround, tinsel leads woven into spider, 2" copper voice coil, steel basket, ferrite magnet, aluminum former material This combo provides a vehicle-specific enclosure and a robust 12" subwoofer rated for 500W RMS (1000W peak) to deliver deep, controlled bass while maintaining factory fit and appearance.