Relativity Records, often branded just Relativity, is an American record label founded by Barry Kobrin at the site of his company, Important Record Distribution (IRD) in metro New York. Early on, as an indie label, Relativity released music in a variety of styles, including dance, jazz, punk, and progressive rock. As it grew and became associated with Sony Music Entertainment, it became more known for its popular metal and hip-hop releases.

Although it was reportedly established in 1985, there is evidence that the brand actually began c. 1982 as an in-house IRD label.

In the 1980s, Relativity was mostly focused on rock music, including heavy metal. Releases in this genre were split among Relativity and its sister label Combat Records, which folded back into the main Relativity label in 1990. Artists signed during this period include Death, Exodus, Megadeth, Napalm Death, Impelliteri, Corrosion of Conformity, Circle Jerks, Murphy's Law, Jet Red, Joe Satriani, Shotgun Messiah, Scatterbrain, Scott Henderson, Sick of it All, Steve Vai, Stuart Hamm, Tigertailz, Dark Angel, Lucy's Fur Coat and Forbidden.

Darnel Robinson,(born September 4, 1969) better known by his stage name Dru Down, is an American rapper and actor from Oakland, California. He is a member of The Regime, a collective of rappers that includes Yukmouth, Tech N9ne, Messy Marv, BG Bulletwound, Dorasel, Grant Rice, Tha Realest and Gonzoe...

The title track of his 1996 album Can You Feel Me was a minor hit. He's performed with Spice 1, E-40, Richie Rich, Shock G, Yukmouth, The Luniz, and other Bay Area rappers, and introduces the 2Pac song "All About You". Dru Down also plays a part in the 1996 movie Original Gangstas He had a short tenure with Ruthless Records in 2001-2002, although the album was ultimately released via C-Note Records, this fact is alluded to in the beginning of his album, Gangsta Pimpin'. In 2001 he released a movie of his own named Hip Hop & Porn Stars. Currently Dru is signed to rapper Yukmouth's Smoke-A-Lot Records and owns his own record label entitled Pimp On Records.Dru Down released his 2010 album Chronicles of a Pimp on November 16.

Joseph Antonio Cartagena (born August 19, 1970), better known by his stage name Fat Joe, is an American rapper, CEO of Terror Squad Entertainment, and member of musical groups D.I.T.C. and Terror Squad.

Fat Joe's first album was Represent, released in 1993, followed by Jealous One's Envy in 1995. From 1998 to 2006, he was signed to Atlantic Records, releasing four albums under the label, Don Cartagena in 1998, Jealous Ones Still Envy (J.O.S.E.) in 2001, Loyalty in 2002, and All or Nothing in 2005. Around the release of All or Nothing, Fat Joe became involved in a highly publicized feud with another New York City-based rapper 50 Cent, who attacked Fat Joe in his song "Piggy Bank". His most popular song in which he performed was his Remy Ma duet "Lean Back" with Terror Squad. The song was a number-one hit in the summer of 2004.

Starting in 2006, when his album Me, Myself, & I was released, Fat Joe was signed to Imperial Records, which distributes through Terror Squad Entertainment. His follow up album wasThe Elephant in the Room, which was released in 2008; Jealous Ones Still Envy 2 (J.O.S.E. 2), the sequel to Jealous Ones Still Envy (J.O.S.E.), was released in October 2009. His tenth album The Darkside Vol. 1 was released on July 27, 2010.

Maxwell Dixon (born March 4, 1966) is an emcee best known as a member of the group Brand Nubian.

He made his debut with the group Masters of Ceremony. Its album Dynamite (1988) was hailed by critics, but probably due to lack of sales, the group soon disbanded, and Puba emerged as the lead emcee of Brand Nubian. After their innovative and versatile debut album One for All (1990)—covering areas from reggae-influenced hip hop music to new jack swing—Puba left the group after disputes with its other members and embarked on a solo career. He became a member of the group again around 1997, recording a few tracks for various soundtracks leading up to the full-length album Foundation in '98. In 1999, Puba and group mate Sadat X performed on the track "Once Again" on Handsome Boy Modeling School's concept album So... How's Your Girl? Following the group's 2004 effort Fire in the Hole, a rejuvenated Puba appeared on tracks with Beanie Sigel ("Bread and Butter," also featuring groupmate Sadat X), Missy Elliott ("My Struggles," featuring his onetime collaborator Mary J. Blige), and Ugly Duckling ("Something's Going Down Tonight").

Diamond D (born Joseph Kirkland, 1969) is a hip hop producer and MC from the Bronx, New York City, and one of the founding members of the legendary D.I.T.C. crew.

He started out as a DJ for Jazzy Jay back in the late 1980s and was at the same time perfecting his skills in beat making and turntablism, and, together with rhyme partner Master Rob, he was one half of the group Ultimate Force. The group signed with Jazzy Jay's Strong City Records, and Diamond and Rob started recording their debut album, I'm Not Playin', in 1988 and released the 12-inch single with the same title, which spawned a buzz in the underground. The album was completed in 1990, but it got caught up in label politics, such as the shutdown of Strong City distributor Uni Records, and was shelved until 2007 when it was released through Traffic Entertainment. One of the last songs recorded for the album was a Diamond D solo song in which he actually picked up the mike for the first time. The song was called "The Best-Kept Secret." As Ultimate Force dissolved, record executives got their eyes on the Bronx phenomenon, which eventually resulted in the release of Diamond's debut album, Stunts, Blunts and Hip Hop (released under the moniker Diamond & the Psychotic Neurotics), in 1992. The album is considered to be one of the finest D.I.T.C. solo LPs and features early appearances from Big L and Fat Joe, the latter of whose 1993 debut album, Represent, was mainly produced by Diamond D.