This Reg cab Chev came in for simple yet effective audio system! We installed a JVC mechless touchscreen w/ Apple CarPlay for easy use!  We treated the doors w/ Focal Bam, then built composite speaker adapters to mount JL Audio C3 speakers! For bass we used a JL Audio 10TW3 sub in a custom sealed enclosure, and powered everything off of a Focal 4 channel amp!