4 inch Rear windshield midrange speaker For Mercedes Benz W204 W205 W212 W213 X253 GLC C E class loudspeaker audio upgrade horns|Multi-tone & Claxon Horns| - AliExpress
10 Inch Audio Speaker Subwoofer 4 Ohm 600w Modified V-type Steel High-power 38mm Ksv Car Auto Bass Speaker Play Music - Speakers - AliExpress
JBL Stadium 82SSI Stadium Series 8" component subwoofer with switchable 2- or 4-ohm impedance at Crutchfield