Frederick Jason Carter, known professionally as Mad Doctor X and DJ Jason among other aliases, is a British DJ. He ran Blapps! Records from 1988 to 1992, releasing several club hits such as "Don't Hold Back" and "Too Much Energy", which were popular in both Baltimore, Maryland and the British rave scene. Later, Carter co-founded Blapps Posse with Aston Harvey of Freestylers. He also released a mini album under the pseudonym Turntable Symphony on d-zone records. Throughout his career, Mad Doctor X released several albums, including Dr. X's Hip Hop Experiments Escape From The Lab And Go On The Rampage Vol. 1 (1996), Picnic With The Greys (1999), and Chillonometry (2001).
