Filter Filters Buick Reatta Remove All Filters Price Under $50 (1) $50-$100 (1) $100-$500 (2) Condition New (4) Brand Harmony Audio (4) Fits Buick Reatta 1988-1989 Factory Premium Speaker Upgrade Harmony C4 C69... $120.99 Fits Buick Reatta 1990-1991 Factory Premium Speaker Replacement Harmony C4... $104.99 Fits Buick Reatta 1988-1989 Rear Dash Replacement Speaker Harmony HA-R4 Speakers $32.95 Fits Buick Reatta 1988-1989 Rear Deck Replacement Harmony HA-R69 Speakers New $59.95