Allmans are not a "jamband." It doesn't matter that they played legendarily long and improvisational versions of their songs on stage. The definition of a "jamband" - at least to me - is a band where most fans go, "you can probably gloss over the studio stuff." No one with a functioning brain stem has ever said "you can probably gloss over the studio stuff" about the Allman Brothers.

Now, I don't want to instigate an argument, because The Dead (and even Phish to a lesser extent) have great studio material, *but the reputation of these bands still relies mainly on their live prowess.* This is simply not true of the Allman Brothers. They are legends of their time and genre independently of the 40 minute "Whipping Post" from the Filmore. (The term "jamband" itself actually ignores "style"; all it tells us is that the band likes to play long and instrumentally. So if we're even going to buy into that term and its associated meanings, @Lemuria was absolutely correct to exclude the Allmans.)