Although he is best known for his work with the “MGs” his playing style was much sought after and in later years he worked with the likes of Eric Clapton, Neil Young, Stevie Nicks and Rod Stewart.
Dunn, still working, was in Japan for a series of concerts.
News of his death was posted on the Facebook site of his friend and fellow musician Steve Cropper, who was on the same tour. Cropper said Dunn died in his sleep.
“Today I lost my best friend, the World has lost the best guy and bass player to ever live,” Cropper wrote on Twitter.
The “MGs” were inducted into the Rock and Roll Hall of Fame in 1992, and Dunn received a lifetime achievement Grammy award in 2007.
The Duck will be sadly missed.