There are at least two artists with the name Hybrid Theory. 1. The previous name for Linkin Park. 2. A British House production duo (active from 2010 to present) 1. Hybrid Theory is an EP by Linkin Park (who were at that time called Hybrid Theory, making it a self-titled record), recorded and released in May 1999. 2. Aiden Smith and James Crone are more frequently known as Hybrid Theory – a fast-rising duo of producers becoming increasingly reputable through their eclectic style and sickening work-rate.