Abstract: The present disclosure generally provides a method of manufacture of a custom fit in-ear module, including capturing an anatomical representation of a body part at a first location; transferring the stored data to a second electronic device positioned at a second location; forming a three-dimensional digital model from the stored data using the second electronic device; transforming the three-dimensional digital model, wherein the transforming comprises forming a cavity within the three-dimensional digital model, wherein the cavity is sized to receive an acoustic output member and one or more drivers; transferring the transformed three dimensional model to a third electronic device positioned at a third location; forming a body of an in-ear monitor using the transformed three dimensional model; and positioning the acoustic output member and one or more drivers within the formed body, wherein the acoustic output member and one or more drivers reside at least partially within the cavity.