Set of golf club irons

A set of golf clubs, comprising a plurality of clubs wherein each of the plurality of clubs comprises a shaft and a club head, the shaft of each club being shorter in length than the shaft of a preceding club in the plurality of clubs, wherein:

• each of the plurality of club heads has a front portion and a back portion;
• the front portion defines a front cavity therein;
• the back portion defines a back cavity therein;
• the front cavity has a third cavity formed within;
• the back cavity has an upper aperture therein communicating with the front cavity;
• the back cavity has a lower aperture therein communicating with the third cavity;
• the third cavity has a greater height than the lower aperture;
• the upper and lower apertures are the only two apertures extending from the back cavity towards the front cavity;
• each of the plurality of club heads has a vibration dampening and acoustic attenuating member occupying the entire third cavity, the entire lower aperture, and a portion of the back cavity, the vibration dampening and acoustical attenuating member having a weight member included therein;
• means for progressively elevating the vertical position of a center of gravity of the club head for at least some of the clubs in the set;
• and
• a strike face insert is attached within the front cavity, and