Spatial information can be represented in multiple modalities and using different reference systems. Some display configurations may be more optimal than others, depending on task characteristics and human cognitive capabilities. The current study investigated the effectiveness of spatial auditory cues for tasks involving two reference frames, and examined how congruency between visual and auditory displays and tasks affected performance. Six bimodal display configurations were compared using three spatial tasks: visual search, target localization and memory for target location. The results indicated that while task-congruent cues were always most beneficial, even task-incongruent cues improved performance relative to non-spatial conditions. In addition, egocentric cues facilitated performance more so than the exocentric cues on task-incongruent trials. No effect of congruency between visual and auditory displays was observed on task performance. The findings have important implications for display design in environments where diverse spatial tasks are performed concurrently or in close succession.