Home Jambase Duane Allman Guests With Grateful Dead On This Date In 1971National Music NewsJambaseMusicDuane Allman Guests With Grateful Dead On This Date In 1971April 26, 2017213FacebookTwitterPinterestWhatsApp Listen to Duane Allman sit-in with the Grateful Dead on three songs at NYC’s Fillmore East on this date in 1971.