This Package Includes the Following Items:
1 x Alpine S-A60M Car Audio Type S Series Amp Class D Sub 1200W Amp
1 x Harmony Audio HA-AK4 Complete 4 Gauge Amp Install Kit - Nickel
1 x Alpine S-W12D4 Type S Series Sub Dual 4 Ohm 1200W Peak 12" Subwoofer
1 x Compatible with 2007-2013 Chevy Silverado 1500 Extended Cab Truck Single 12" Subwoofer Box Sub Enclosure
Alpine S-A60M Car Audio Type S Series Amp Class D Sub 1200W Amp:
Product Details:Alpine S-Series Mono Power Amplifier - S-A60M
Power Output:400W RMS x 1
600W RMS x 1

Frequency Response: 10HZ-400Hz

Alpine S-W12D4 Type S Series Sub Dual 4 Ohm 1200W Peak 12" Subwoofer:
General Features:12" 4 Ohm Type-S Series Subwoofer
Power Handling:Peak: 1800 watts
RMS: 600 watts

Frequency Response: 26- 200Hz

Compatible with 2007-2013 Chevy Silverado 1500 Extended Cab Truck Single 12" Subwoofer Box Sub Enclosure:
Features:
Mounting Depth: 5-3/4"
Air Space: 0.65 Cubic Feet
Sealed Enclosure
High Quality Spring Loaded Terminal Cup (Bare Wire 'up to 10GA')
Fits under rear seat on Driver side only
Model trucks with low transmission hump may require spacers to hold the box up
Will fit full bench and 60/40 bench seat trucks