This action is regulated, settled, and then carefully inspected and reregulated. Special materials are used to minimize changes in the regulation due to use. In our 14 point reinforced hammers we use only the highest quality Australian-wool felt. Hammers are individually voiced and tone-regulated for uniformity in sound throughout the piano. A standard weight is placed on the front of each key while key leads are positioned to obtain proper calibration.
Every key is calibrated separately with weights placed differently both in position and number.
Individually lead-weighted keys provide a consistent touch from note to note. Placing weights in the same position on every key is like balancing all four wheels of a car based on the individual balance requirements of only one of the wheels. Few manufacturers invest the time and expense required to vary weights in both position and number for the purpose of obtaining the proper touch weight. Better built grand pianos all have individually lead-weighted keys. Grand size key covers enlarge the playing surface for those accustomed to performing on grand pianos.