The Allman Brothers Band

The Allman Brothers Band is an American rock/blues band once based in Macon, Georgia. The band was formed in Jacksonville, Florida, in 1969 by brothers Duane Allman (slide guitar and lead guitar) and Gregg Allman (vocals, organ, songwriting), plus Dickey Betts (lead guitar, vocals, songwriting), Berry Oakley (bass guitar), Butch Trucks (drums), and Jai Johanny "Jaimoe" Johanson (drums). While the band has been called the principal architects of Southern rock, they also incorporate elements of blues, jazz, and country music, and their live shows have jam band-style improvisation and instrumentals.

source: Wikipedia