A golf club head may include a face with an embedded monolith having first and second sensors for measuring impact with a golf ball. The first and second sensors may output positive and negative pressure signals at the same time, caused by the impact, with the negative pressure indicating an outward bowing of the monolith whereas the positive pressure indicates an inward compression. These positive and negative values may be captured over the duration of impact and used to create a time-varying impact pressure profile with increased accuracy. The club head may also include a mechanism for placing a static pressure on the monolith, increasing negative pressure sensitivity and adjusting the ability to measure negative impact pressures away from the contact point on the club face.