Sound system improve in VW Passat with minimal interference with factory design List: Headunit: Alpine CDA-137BtiAmplifier:EXURSION HXA 45Subwoofer: JL Audio 10W3v3-4Front speakers: Morel Maximo 6Rear speakers: Morel Maximo coaxInstallation Accessories: Bassr Car Audio, Silan Coat, Hollywood