Hybrid Theory is the first EP by Hybrid Theory, a previous name of the band Linkin Park. The album was recorded and self-released in May 1, 1999 through Mix Media. Later that year, the band changed its name to Linkin Park and Hybrid Theory was re-mixed and remastered for another limited release in 2001 (with minor changes) in the credits and artwork for members of Linkin Park's fan club. Only about 1,000 copies were pressed and released. Original versions of the EP are hard to find.

Background

The financing for the original pressing was obtained through a publishing deal with Zomba Music Publishing after one of its representatives, Jeff Blue, heard the band playing at the Whisky a Go Go. Initial sales were merely a handful but the band persisted. They began plugging the album in chat rooms and sending free copies to anyone who expressed interest. An informal 'street team' developed from the on-line community to spread the music. With Dave Farrell's temporary departure from the band to perform with Tasty Snax, Kyle Christener took over the bass position. However, he did not stay for long and did not take part in the band's debut album.