Ensemble 4-33 is a professional musical ensemble that presents experimental and avant-garde repertoire from mid-century to present.

Founded by Rebecca Smithorn and Sam Bessen, the ensemble grew out of a graduate performance seminar at the Peabody Conservatory led by Dr. Ian Power and now presents outstanding and innovative concerts throughout the Baltimore area. Ensemble 4-33 is a fiscally sponsored project of Strong City Baltimore. 
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