Home Jambase Pro-Shot Video: Jason Isbell & The 400 Unit Perform New Songs...National Music NewsJambaseMusic[UPDATED] Pro-Shot Video: Jason Isbell & The 400 Unit Perform New Songs At 909 In-Studio SessionMay 25, 2017272FacebookTwitterPinterestWhatsApp Watch Jason Isbell & The 400 Unit perform songs from their upcoming new album for 90.9 FM in Kansas City.