Lightning Audio L1-S412 12" 4-ohm subwoofer at Crutchfield
Lightning Audio L675 - Speakers - for car - 40 Watt - 3-way - coaxial - 6.75" - Walmart.com
Amazon.com: [Apple MFi Certified] Lightning to RCA Cable for iPhone IPA-d, 2-Male Y Splitter Aux Audio Cord Compatible with iPhone 12 Pro/11/11 Pro/XS/X/8/7/6 Adapter for Car, Amplifiers, Home Theater, Speaker : Electronics