2007-2013 GMC Sierra Ext Cab Dual 10" Under-Seat Sub Box with Harmony HA-R104 Subs & Kicker CX300.1 / CXA400.1 Amp

Package contents reworked for easy installation and powerful bass: 1 x Custom Chevy Silverado 07-13 Subwoofer Box Extended Cab Dual 10"; 2 x Harmony Audio HA-R104 Car Stereo Rhythm Series 500 Watt Single 4 Ohm 10" Sub; 1 x Kicker CX300.1 Car Audio CXSeries Class D Subwoofer Amplifier 600 Watt Sub Amp; 1 x Harmony Audio HA-AK10 Car 10 Gauge 600 Watt Amp Kit. Custom Chevy Silverado 07-13 Subwoofer Box (Extended Cab, Dual 10"): Sealed down-firing enclosure built to fit under the rear seat. Mounting Depth: 6". Air Space: 0.60 Cubic Feet Per Sub. Dimensions: Width 55-3/4" x Front Height 8-3/4" x Rear Height 5" x Depth 14-3/4". Harmony Audio HA-R104 Rhythm Series 10" Subwoofer (each): Power Handling — Peak: 500 watts, RMS: 250 watts. Sensitivity: 86.1dB. Frequency Response: 30Hz-1.5kHz. Mounting Depth: 5 5/16". Mounting Cutout Diameter: 9 1/4". Voice Coil / Impedance: Single 4 Ohm. Kicker CX300.1 CXSeries Class D Sub Amp (600 Watt Max): RMS Power Rating — 4 ohms: 150 watts x 1 chan.; 2 ohms: 300 watts x 1 chan. Max power output: 600 watts x 1 chan. Variable low-pass filter: 50-200 Hz, 12 dB/octave. Subsonic filter: 24 dB at 25 Hz. Frequency response: 25-200 Hz. This kit provides a vehicle-specific sealed enclosure, a pair of high-output 10" Rhythm Series subs, a compact Class D sub amplifier, and a 10-gauge installation kit — everything required to add deep, controlled bass to compatible 2007-2013 extended cab trucks.