Home >> Audi >> 2017 >> S6 Premium Plus >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Entertainment Systems >> Entertainment System & Communication System (Service Information - 1 Of 2) >> Communication >> Sound System >> Left And Right Front Bass Speaker -R21- / -R23-, Removing And Installing >> Left/Right Front Bass Speaker -R21- / -R23-, Removing And Installing, BOSE >> Tightening Specifications