2007-2013 Chevy & GMC Silverado/Sierra Ext Cab Single 12" Sub Box + Harmony HA-F124 12" Flatline Subwoofer (800W Peak / 400W RMS, 4Ω)

Package Contents: 1 x 2007-2013 Chevy Silverado 1500 Extended Cab Truck Single 12" Subwoofer Box Sub Enclosure 1 x Harmony Stereo HA-F124 Car Stereo Flatline Series 800 Watt Single 4 Ohm 12" Sub Vehicle-Specific Sealed Sub Enclosure (Single 12"): - Designed for: 2007-2013 Chevy Silverado 1500 Extended Cab Truck (Ext Cab), also fits 2007-2013 GMC Sierra 1500 Ext Cab, and 2007-2013 Chevy/GMC Silverado/Sierra 2500HD & 3500HD Ext Cab Trucks - Mounting Depth: 5-3/4" - Air Space: 0.65 Cubic Feet - Sealed enclosure built from High Quality MDF - Covered in High Quality Black Carpet - High Quality Spring Loaded Terminal Cup (Bare Wire 'up to 10GA') - Installs under the rear seat on the driver side only - May require spacers on model trucks with a low transmission hump to properly support the box - Will fit trucks equipped with either a full bench or 60/40 bench seat Harmony Stereo HA-F124 12" Flatline Series Subwoofer (Single 4 Ohm): Specifications: - Power Handling: Peak: 800 watts | RMS: 400 watts - Sensitivity: 87.3dB - Frequency Response: 25Hz-1.2Hz - Mounting Depth: 4 1/2" - Mounting Cutout Diameter: 11 1/8" - Min Sealed Box Volume (Cubic Feet): 0.55 - Max Sealed Box Volume (Cubic Feet): 3 - Min Vented Box Volume (Cubic Feet): 1.68 - Max Vented Box Volume (Cubic Feet): 2.25 Single 4 Ohm Features: - Polypropylene Injection Molded Cone - Aluminum Cone Cap - Butyl Rubber Surround - Tinsel Leads Woven into Spider - 2" Copper Voice Coil - Steel Basket - Ferrite Magnet - Kapton Former Material This package pairs a vehicle-tailored sealed enclosure sized to sit under the driver-side rear seat with the Harmony HA-F124 Flatline 12" subwoofer, giving a compact, vehicle-matched solution optimized for low-frequency performance in 2007-2013 Silverado/Sierra extended cab trucks.