Das EFX is an American hip hop duo. It consists of emcees Dray and Skoob. They named themselves "DAS" standing for "Dray and Skoob" and "EFX" meaning "effects". They rose to popularity in the early 1990s due to the duo's stream of consciousness lyrical delivery, which became one of the most influential lyrical styles in rap music at the time; as well as their affiliation with EPMD's Hit Squad. Their style combined intricate rhymes, sometimes mixed with made up words, delivered with a fast-paced flow and numerous pop culture and hip hop culture references.

EPMD is an American hip hop duo from Brentwood, New York. The duo's name is an acronym for "Erick and Parrish Making Dollars", referring to its members: emcees Erick Sermon and Parrish Smith. During an interview on college radio station WHOV in 1987, Parrish Smith stated that the name evolved from the original: "We were originally known as "EEPMD", but chose to go with EPMD because it was easier to say." He also stated that they dropped the two "E's" because N.W.A.'s Eric Wright was already using "Eazy-E" as his stage name. The group has been active for 37 years.