99-06 GMC Sierra Extended Cab Dual 10" Rhino Sub Box + Harmony HA-R104 (Pair) & CXA400.1

Package Contents: 1 x Chevy Silverado Sub Woofer Box Custom Dual 10" 99-06 Extended Cab; 2 x Harmony Audio HA-R104 Car Stereo Rhythm Series 500 Watt Single 4 Ohm 10" Sub; 1 x Kicker CX300.1 Class D Subwoofer Amplifier 600 Watt Sub Amp; 1 x Harmony Audio HA-AK10 Car 10 Gauge 600 Watt Amp Kit. Chevy Silverado Custom Dual 10" Subwoofer Enclosure (99-06 Extended Cab) — Features and Fitment: - Configuration: Dual 10" sealed enclosure, designed to fit under the rear seat of 1999–2006 Chevy/GMC extended cab trucks with down-firing orientation. - Internal air space: 0.95 Cubic Feet. - Mounting depth: 5-3/4". - Overall dimensions (sealed): Width 51" x Front Height 9-3/4" x Rear Height 7-1/4" x Depth 13-1/2". Harmony Audio HA-R104 Rhythm Series 10" Subwoofer (each) — Key Specs: - Model: Harmony Audio HA-R104, Rhythm Series 10" car sub. - Power handling: Peak 500 watts; RMS 250 watts. - Voice coil load: Single 4 Ohm. - Sensitivity: 86.1 dB. - Frequency response: 30 Hz – 1.5 kHz. - Mounting depth: 5 5/16". - Mounting cutout diameter: 9 1/4". Kicker CX300.1 Class D Subwoofer Amplifier — Performance Details: - Model: Kicker CX300.1. - RMS power: 4 ohms = 150 watts x 1 channel; 2 ohms = 300 watts x 1 channel. - Maximum power output: 600 watts x 1 channel. - Variable low-pass filter: 50–200 Hz, 12 dB/octave. - Subsonic filter: 24 dB at 25 Hz. - Frequency response: 25–200 Hz. Included Installation Accessory: - Harmony Audio HA-AK10 Car 10 Gauge 600 Watt Amp Kit. This bundle is built to give your 1999–2006 Chevy/GMC extended cab truck a compact, under-seat dual-10" sealed solution paired with two Harmony HA-R104 subwoofers and a Kicker CX300.1 Class D sub amp, plus a 10-gauge installation kit for a complete subwoofer upgrade.