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
How to Wire 4 Speakers to a 2 Channel Amp: A Clear and Confident Guide - AC3FILTER