Yamaha Graded Hammer Action Types: GHS, GH, GH3 NW-GH and NWX
NWX (CLP545 and up / CVP705 and up) - Natural Wood X (NWX) keyboards are created using Yamaha's unrivaled expertise in wood-working acquired through more than a century of crafting fine acoustic pianos. The wood used in NWX keyboards has been carefully dried specifically for use in making musical instruments. Only the best wood from the finest part of the tree is selected, resulting in a keyboard that is more resistant to buckling and warping than common laminated wood keyboards.
The NWX keyboard also features an escapement mechanism that reproduces the feel of an acoustic piano as it goes through the let-off and drop of the hammer when a key is played very softly. The action has been designed in such a way that the escapement is discernible only on the lightest keystrokes, similar to the keyboard of a grand piano.
NW-GH (CP4) - Natural Wood keys offer the weight and response that piano players expect. Adding different weight or "grading" the keyboard reproduces the feel of a piano's hammers: heavy in the low end and light in the high end. The surface of the key is lightly porous thanks to Synthetic Ivory key tops that add grip to the keys. This maintains accuracy during long performances or practice sessions. Finally, a third sensor allows grand piano-like key repetition where notes can be re-articulated without a complete release. This makes it easier to play fast, repeated notes and is one of the main reasons pianists choose grand pianos over uprights.
GH3 w/Synth. Ivory (CLP525/YDP163) - Graded Hammer 3 (GH3) 88-key piano action utilizes the same hammering system and spring-less mechanism of a grand piano. This action reproduces the touch of an acoustic piano, from the heavy feel in the lower register to a lighter touch in the upper octaves. It also features a three-sensor configuration, which accurately senses and interprets the behavior of the keyboard in order to provide a grand piano-style response and feel. This allows for quick note repetition and authentic expressive control. Synthetic ivory key tops provide a tactile surface to the white keys, absorbing moisture from the fingers and preventing them from slipping.
GH (YDP181/P255) - Yamaha, using its more than a century-old grand piano-making expertise, created a keyboard that offers a natural playing feel. Just as on a traditional acoustic piano, lower notes on a GH keyboard have a heavier touch, while the higher ones are more responsive to lighter playing. With stability and endurance in response to any kind of performance, it offers the reliability and quality expected of Yamaha keyboards.
GHS (P45/P115/YDP143/YDPV240/DGX660) - The Graded Hammer Standard (GHS) 88-key piano keyboard provides a heavier touch in the low end and lighter touch in the high end, replicating the feel of the hammers inside an acoustic piano. GHS is great for the aspiring pianist, because it can help you build proper finger technique. When it comes time to play an acoustic piano, your hands will be ready! Additionally, the matte finish of the black keys can absorb moisture from your hands, making them less slippery even after hours of practice.