Internal crown rib geometry technology optimizes both sound .
Internal crown rib geometry technology feel at impact , for a pleasant , crisp sound from wherever the ball strikes the clubface to make the S9 - 1 the best sounding driver Cobra has ever produced .
Internal crown rib geometry technology optimizes both sound and feel at impact , for a pleasant , crisp sound from wherever the ball strikes the clubface to make the S9 - 1 the best sounding driver Cobra has ever produced .