Golf club

1. A golf club head, comprising:

a perimeter body including a top line and a sole portion;

a face disposed on a front portion of the perimeter body, wherein the face and the perimeter body define a rear cavity and wherein the face and the sole portion are coupled at a periphery of the face to define a channel between the sole portion and the face;

a hosel disposed at a heel end of the face and the perimeter body,

wherein in the combined perimeter body, face and hosel, at least one of the top line and sole portion include an area exhibiting maximum displacement of a vibration mode in a frequency less than 5500 Hz; and

at least one truss member extending across at least a portion of the rear cavity and mechanically coupling the sole portion and the top line.

2. The golf club head of claim 1 , wherein the area of the top line exhibits maximum displacement of a vibration mode in a frequency of about 3500 Hz to about 5000 Hz.

3. The golf club head of claim 1 , wherein the sole portion includes a heel mass and a toe mass and a central sole portion.

4. The golf club head of claim 3 , wherein the at least one truss member includes a pair of truss members, wherein a first truss member extends between the heel mass and the top line, and wherein a second truss member extends between the toe mass and the top line.

5. The golf club head of claim 4 , wherein the first and second truss members are convergent from the sole portion to the top line.

6. The golf club head of claim 1 , wherein the at least one truss member is spaced from a rear surface of the face.

7. The golf club head of claim 1 , wherein the at least one truss member extends from a rear surface of the face.

8. A golf club head, comprising:

a perimeter body including a top line and a sole portion that forms a lower muscle portion, wherein the lower muscle portion is at least partially hollow to define a lower cavity;

a face disposed on a front portion of the perimeter body, wherein the face and the perimeter body define an upper rear cavity in an upper portion of the golf club head;

a hosel disposed at a heel end of the face and the perimeter body,

wherein in the combined perimeter body, face and hosel, at least one of the top line and sole portion include an area exhibiting maximum displacement of a vibration mode in a frequency less than 5500 Hz; and

at least one truss member extending across at least a portion of the upper rear cavity and mechanically coupling the sole portion and the top line.

9. The golf club head of claim 8 , wherein the lower muscle portion comprises a muscle back shell comprising a material different than a material of the face.

10. The golf club head of claim 8 , further comprising a weight member disposed within lower cavity.

11. The golf club head of claim 10 , wherein the weight member is fully enclosed by the lower muscle portion and the face.

12. A golf club head, comprising:

a perimeter body including a top line and a sole portion;

a face disposed on a front portion of the perimeter body, wherein the face and the perimeter body define a rear cavity;

a hosel disposed at a heel end of the face and the perimeter body,

wherein in the combined perimeter body, face and hosel an area of the top line exhibits maximum displacement of a top line vibration mode in a frequency less than 4500 Hz; and

at least one truss member extending across at least a portion of the rear cavity and mechanically coupling an area of the sole portion and an area of the top line, wherein the truss member increases the frequency of the top line vibration mode to greater than 4500 Hz.

13. The golf club head of claim 12 , wherein in the combined perimeter body, face and hosel an area of the sole portion exhibits maximum displacement of a sole vibration mode in a frequency less than about 6000 Hz.

14. The golf club head of claim 12 , wherein the top line vibration mode has a frequency between about 3000 Hz and about 4500 Hz.

15. The golf club head of claim 12 , wherein the sole portion includes a heel mass and a toe mass and a central sole portion having a reduced height relative to the heel mass and the toe mass.

16. The golf club head of claim 15 , wherein the at least one truss member includes a pair of truss members, wherein a first truss member extends between the heel mass and the top line, and wherein a second truss member extends between the toe mass and the top line.

17. The golf club head of claim 16 , wherein the first and second truss members are convergent from the sole portion to the top line.

18. The golf club head of claim 12 , wherein the at least one truss member is spaced from a rear surface of the face.

19. The golf club head of claim 12 , wherein the at least one truss member extends from a rear surface of the face.