Amazon.com: Car Speaker and Amp Combo: 4X Kicker CSC5 450-Watt 5-1/4" Inch CS Series 2-Way Car Coaxial Speakers - Bundle with 400-Watts 4-Channel Bluetooth Amplifier + 8-Gauge Amp Wiring Kit : Electronics
Amazon.com: Pyle PLBX10A 10 900 Watt Peak Power Low-Profile Compact Enclosed Active Amplified Under Seat Car Audio Subwoofer System Bundle Combo with 8 Gauge Amp Wiring Installation Kit : Electronics
KICKER Hideaway 8" Subwoofer with Enclosure and Integrated 150W Amplifier Black 11HS8 - Best Buy
Dual Electronics TBX10A 10-inch, Enclosed Subwoofer with Built-in 300 Watt Amplifier, New - Walmart.com