By my count, they have seven studio albums, and that's what they specified.
Let me see...one of the albums was a double album, they had one live album, Patterson had one solo album, Jason had a solo album after leaving the band, Patterson and Cooley had a band called Adam's Housecat before DBT, and though they didn't put out an album, I have a bootleg recording that we'll count as #10, the Black Crowes new album rips off DBT on one song, so we'll call that #11. Well, I'm still one short of 12....