The golf club features a Contour Ellipse, which incorporates a re-engineered multi-thickness face that can be as thin as 1.2mm, roughly the thickness of 12 sheets of paper. This design represents a 30% improvement over the JPX923 model, enhancing ball speed and energy transfer upon impact. The clubface is shaped in an angled ellipse, extending from the high toe to the low heel, optimizing performance for common mishit areas and ensuring maximum speed retention even when the ball is not struck perfectly in the centrE.

The club also includes a Seamless Cup Face, a one-piece geometry that allows for thinned areas around the entire perimeter. This design increases the CORAREA (Coefficient of Restitution Area), ensuring that the ball retains more speed across the entire face, not just the sweet spot.

In terms of construction, the club utilizes Nickel Tungsten weighting in the 4-7 irons, positioning the weight low to promote a higher launch and a lower sweet spot. This configuration is particularly beneficial for shots hit off the turf, leading to steeper landing angles and better control on the green.

Finally, Harmonic Impact Technology focuses on optimizing the feel of the club by fine-tuning the sound it produces at impact, as feel is closely related to sound. The head geometry is carefully engineered to provide ideal feedback, while Acoustic Sound Ribs along the top edge add rigidity to the top line, improving feel. A Sound Bar on the back of the club attenuates certain sound frequencies, eliminating undesirable tinny or clicky noises, and ensuring a satisfying, tour-preferred impact sound.