The invention relates to a dynamic mixer (1, 100) for a plurality of fluid components, wherein said mixer contains a housing (2, 102) and a rotor element (3, 103) which is rotatably arranged in the housing, wherein the housing has a respective inlet opening (12, 13, 112, 113) at least for each component and at least one outlet opening (20, 120). An annular gap (15, 115) is provided between the rotor element and the housing, wherein in said annular gap a mixing element (7, 107) which is connected to the rotor element (3, 103) is arranged. The housing comprises a first prechamber (21, 121) and a main chamber (22, 122). A second prechamber (17, 117) is provided, which is arranged downstream of the first prechamber (21, 121), such that the components can flow through the first prechamber (21, 121), before the components enter the second prechamber (17, 117).
