Golf club

A clubhead for an iron-type golf club, the clubhead comprising:

• a body having a heel portion, a toe portion, a top-line portion, a rear portion, a face portion, a sole portion extending rearwardly from a lower end of the face portion to a lower portion of the rear portion,
• wherein a sole bar defines a rearward portion of the sole portion,
• wherein a cavity is defined by a region of the body rearward of the face portion, forward of the rear portion, above the sole portion, and below the top-line portion,
• wherein a lower undercut region is defined within the cavity rearward of the face portion, forward of the sole bar, and above the sole portion,
• wherein a lower ledge extends above the sole bar to further define the lower undercut region,
• wherein an upper undercut region is defined within the cavity rearward of the face portion, forward of an upper ledge and below the top-line portion, and
• wherein the upper ledge extends below the top-line portion;
• and
• a shim received at least in part by the upper ledge and the lower ledge, wherein the shim is configured to close a non-circular opening in the cavity and to enclose an internal cavity volume between 5 cc and 30 cc, and the shim has a density of no more than 2 g/cc;
• wherein the opening in the cavity has an area as projected onto the face portion of between 1200 mm2 and 2000 mm2, and the area as projected onto the face portion of the opening in the cavity is at least 62% of an area of the shim as projected onto the face portion;
• wherein the clubhead has an external water-displaced clubhead volume between 35 cc and 65 cc;
• and
• wherein a ratio of the internal cavity volume to the external water-displaced clubhead volume is between 0.1 and 0.4.

A clubhead for an iron-type golf club, the clubhead comprising:

• a body having a heel portion, a toe portion, a top-line portion, a rear portion, a face portion, a sole portion extending rearwardly from a lower end of the face portion to a lower portion of the rear portion,
• wherein a sole bar defines a rearward portion of the sole portion,
• wherein a cavity is defined by a region of the body rearward of the face portion, forward of the rear portion, above the sole portion, and below the top-line portion,
• wherein a lower undercut region is defined within the cavity rearward of the face portion, forward of the sole bar, and above the sole portion,
• wherein a lower ledge extends above the sole bar to further define the lower undercut region,
• wherein an upper undercut region is defined within the cavity rearward of the face portion, forward of an upper ledge and below the top-line portion, and
• wherein the upper ledge extends below the top-line portion;
• a damper located at least partially within the lower undercut region with at least a portion of the damper contacting a rearward wall of the face portion, and at least a portion of the damper contacting the sole bar;
• and
• a shim received at least in part by the upper ledge and the lower ledge, wherein the shim is separately formed from and affixed to the body, and the shim is configured to close an opening in the cavity and to enclose an internal cavity volume between 5 cc and 20 cc;
• wherein the opening in the cavity has an area as projected onto the face portion of between 800 mm2 and 2000 mm2;
• wherein the damper has a front surface nearest the rearward wall of the face portion, and the front surface includes a plurality of front surface projections contacting the rearward wall of the face portion, and a plurality of front surface relief cutouts not in contact with the rearward wall of the face portion;
• wherein the damper has damper length of at least 40 mm as measured in a heel-to-toe direction, and the damper has a damper height above a ground plane that varies along the damper length;
• wherein the damper has a rear surface nearest the sole bar, and the rear surface includes a plurality of rear surface projections contacting the sole bar, and a plurality of rear surface relief cutouts not in contact with the sole bar.