Tombstone today: From left, Justin Lyon, Joshua Lyon, Mark Taber, Adrienne West, Ken Lyon, Rick Bellaire, Gary "Guitar" Gramolini, Brenda Mosher Bennett, Don "D.C." Culp, Michael "Tunes" Antunes, Lori Lacaille Martin.

At the Blackstone River Theatre in Cumberland Saturday night, the usually hard-rocking R&B ensemble that is Ken Lyon & Tombstone plan two acoustic sets, including one of all-new material.

Here are some tunes recorded live at Chan's in Woonsocket last fall, part of an acoustic set devised to keep down the volume for the neighbors:

Mp3s: Sugarbones | Baby I Love You So

The long-playing Tombstone Blues Band, formed in 1967, owns a special niche in Rhode Island rock and roll history

I blogged a long piece about Ken Lyon and the band in April 2007, in advance of their retrospective concert at the Stadium Theater in Woonsocket.

The Unplugged show starts at 8 p.m. at 549 Broad Street, Cumberland. Tickets: www.riverfolk.org; $12 in advance, $15 on Saturday.