All Them Witches hails from Nashville, and the combination of name and hometown gives you a pretty good sense of a split personality. The moniker hints at a band in thrall to Black Sabbath, and the Tennessee city hints at something Southern - although its debts are to blues and Southern rock and not in any way country. (Bassist/singer Michael Parks Jr. noted, however: "We have been known to just pop up on the street somewhere during tour playing bluegrass on the street.")

But when the band returns to Rozz-Tox on February 15, it will be apparent that the quartet is far more expansive than that would suggest. All Them Witches embraces not just blues-based music but the blues themselves, particularly on "The Marriage of Coyote Woman" from its most recent album, Lightning at the Door. The elemental riffs of Ben McLeod have the heaviness of Sabbath's Tommy Iommi but also the razor-sharp lyricism of Queens of the Stone Age's Joshua Homme.

And, most importantly, there's an experimental psychedelic core, a grounding in improvisation that allows each person in the band to bring a distinct personality to tracks that might go anywhere - including, to cite just one example, throat singing in the folk-ish and completely un-metal "Romany Dagger."

And that anything-goes quality is the reason I was curious about this comment I read from drummer Robby Staebler: "As individual players we are more concerned and focused on our own playing. We are not focused on what the others are playing. We all do what we want. It's why it works."