JBL Club 1024 10" component subwoofer with switchable 2- or 4-ohm impedance at Crutchfield
JBL SUB80P 8" 200W Wireless Powered Subwoofer Gloss Black JBLSUB80PBLKAM - Best Buy
5 Inch Car Audio Speaker I Key Buy 12v 220v Max 100watts Hifi Bluetooth Active Motor Auto Van Boom Box Loudspeakers Subwoofer - Subwoofers - AliExpress
S3-1224 | 12" (300mm) high-performance car audio subwoofer