"We attended and, sadly, a 49-year-old man was pronounced dead at the scene. His next of kin have been informed.
"The death is not being treated as suspicious and a file will be prepared for the coroner."
East of England Ambulance service also say they were called to the address where a man was found unconscious.
An ambulance was sent but he was pronounced dead at the scene.
The Prodigy found huge fame after emerging from the underground rave scene in the early 1990s.
They went on to become one of the UK's biggest bands.
They got to the No1 spot in the UK singles chart with their famous song Firestarter and again with Breathe in 1996.
Prodigy also has six No1 albums. Keith became an iconic figure in the British music scene thanks to his energetic live performances and his distinctive look of wild hair and lots of tattoos.
The singer was born in Redbridge, East London, before moving to Braintree, Essex as a child.
It was after the move that he met Prodigy co-founder Liam Howlett in one of the town's nightclubs.
Keith was originally a dancer for the group, but it was his work as vocalist hit Firestarter propelled them to mainstream fame.
He became a household name thanks to his appearance in the music video, where he's seen dancing aggressively in a disused railway tunnel.
Keith famously dated TV presenter Gail Porter in the 1990s and later married Japanese DJ, Mayumi Kai.
In recent years he retired to the countryside and ran a genteel country pub in Essex until 2017.
He and his wife restored a mock-Tudor listed home, and 10 years ago he revealed he'd quit drink and drugs in favour of sober living.