The E531B with stereo MS setup capsules arrangement makes it easy to record in stereo and get a realistic, spacious capture at a live event. It can also be switched between its 90º and 120º setting to control stereo image width. Choose 90º for instrument solos and speech to get a clear and focused sound image when the sound source occupies a narrow space. The 120º setting is a good choice for a band, choir, and large stage performances which occupy a wider space.