Filter Filters Audi 400 Series Remove All Filters Price $50-$100 (1) $100-$500 (1) Condition New (2) Brand Harmony Audio (1) Kicker (1) Audi 4000 Series 1980-1987 Factory Speaker Upgrade Harmony R4 R5 Package New $72.99 Audi 400 Series 1980-1987 Factory Speaker Upgrade Kicker DSC4 DSC5 Package New $129.98