As previously reported, Sound Tribe Sector 9 will headline Morrison, COs famed Red Rocks on September 7 and 8. Now, the group has confirmed that a number of additional acts will support the group throughout its two-night run, including De La Soul, RJD2, Glitch Mob and Eliot Lipp. Last year Jurrassic-5 supported the group at the famous amphitheatre. STS9 will play Chicagos House of Blues this Friday and the Windy Citys Lollapalooza this Saturday. For more on the group please read our recent site interview with bassist David Murphy.