A golf club head having a body defining a heel, toe, top wall, sole defining a bottom wall, and a front wall defining an upwardly and rearwardly inclined front face, and comprising the body defining a forwardly extending main recess located rearwardly of the front wall; and the body also defining an undercut recess located directly rearwardly of the front wall and extending outwardly from the main recess toward one or more of the following: i) the top wall ii) the bottom wall iii) the toe iv) the heel; and structure on said front wall and located forwardly of the main recess for attenuating audible vibration created when a golf ball is struck by the front face. The front wall has a rear side, and the referenced structure on the front wall is attached to the front wall rear side and is everywhere spaced from the undercut recess, the undercut recess openly exposed to the main recess.