A power trio in the mold of Cream, including drummer John Sferra and bassist Dan Pecchio (later with the Michael Stanley Band), Youngstown's Glass Harp made its first splashes as the road-bound James Gang's replacement at JB's in Kent and soon developed one of the largest followings in the region. Ignited by Keaggy's remarkable virtuosity, the band pushed the trio format beyond extended blues-rock riffing, incorporating harmonic invention that predates the present-day "jam band" aesthetic. They were strong with pop vocal harmonies as well. Three early '70s albums for the Decca label brought them national show-opener status, but Keaggy's religion drew him from the band and toward a prolific career as a contemporary Christian artist, amassing a catalog of more than 20 releases. This performance constitutes only their second Cleveland gig in the last 30 years, and should include material from their forthcoming release, Hourglass, as well as old favorites.