A golf club head that is capable of preserving the metallic acoustic signature of an entirely metallic golf club head all while utilizing a lightweight composite material is disclosed herein. More specifically, the golf club head in accordance with the present invention creates a frontal acoustic chamber in conjunction with a rear weight saving chamber via a panel member barrier is disclosed. The panel member may even be combined with an optimized thickness relationship at the transition region between the striking face portion and the panel member to further optimize the performance of the golf club head.