an apparatus and a method for spinning dyed filaments from a dyed polymer melt , wherein an undyed polymer melt is produced by a melt producer . a liquid dye is added to the polymer melt by means of a dye metering device . to mix the liquid dye and dye the polymer melt , a mixing unit is provided . the dyed polymer is then spun to filaments by means of a spin unit . to obtain before the spinning step a uniform coloration of the polymer melt despite the short dwelling time of the liquid dye in the polymer melt , the liquid dye and the polymer melt are mixed in a plurality of successive mixing units which are formed by a mixer combination comprising at least one static mixer and at least one dynamic mixer .