Yamaha S6X
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Yamaha S6X

We took everything we learned from our Flagship CF concert grand and crafted an instrument that’s perfectly suited for the conservatory, recital hall or intimate stage. SX pianos are almost entirely handcrafted and feature our patented Acoustic Resonance Enhancement process to precisely control the aging of wood in the rims for a warm, elegant tone. A completely redesigned hammer helps produce a wide palette of colors with an intimate sound and depth rarely found in a concert grand.

The clear sound of each note resonates and creates warm harmony. Suitable for salon halls, the S6X will inspire both the pianist and their audience.

Yamaha’s Acoustic Resonance Enhancement (A.R.E.) is the latest leap forward in the evolution of piano craftsmanship. What is A.R.E.? It’s an original treatment process that we use to season the rims used in SX Series pianos. As well as reducing the moisture content in the wooden rims, A.R.E. induces chemical changes that occur when young wood is aged under optimal conditions. This enables the rims to produce the warm and sweet tones of an instrument matured to perfection. The benefits of A.R.E. have already been proven in Yamaha’s acclaimed flagship Artida YVN500S violin, L Series and A Series guitars. Now, for the first time, A.R.E. comes to an acoustic piano. The seasoned rims of the SX Series give it a sound unlike that of any other piano. A deeply intuitive sound with sustained resonance and the precision to express even the most delicate pianissimo notes.


For the inner and outer rims of the SX Series, Yamaha craftsmen carefully selected wood based on its acoustic characteristics. During construction, they reduced the number of glue layers, using more than 30% thicker wooden materials than those of forerunner S Series pianos, to bring out the inherent resonance of that wood. This approach has shaped the acoustic character of the SX Series, adding richness, clarity, and muscle to the bass and mid-range, while maintaining a warm and inviting overall tone.


In order to realize the ideal sound, one of the most important factors is that the hammers must complement the piano body. The SX Series employs exclusive hammer felt made with a newly developed formula. Yamaha tested countless prototypes in the quest to find the perfect match for this piano. The superb elasticity of this hammer felt allows the player to achieve clear and beautiful tonal colors, along with well-balanced density across the full range from bass to treble. As a player, you’ll relish the artistic freedom and expressive nuance offered by the SX Series.


The huge forces exerted by a powerful fortissimo passage can cause a back frame to bend slightly and lose energy. To withstand such forces and efficiently turn them into richly resonant reverberations, a piano must have a strong back frame. Compared to the forerunner S Series pianos, the back frame beams on the SX Series are around 20% thicker. The extra support they provide results in a more rigid body and less unwanted vibration. The SX Series is built from the bottom up to provide a solid and stable foundation that supports authentic musicality. 


Like a violin, a piano is a symphony of subtle curves. But the curve that arguably matters most in a piano is one you don’t often see—the convex section of the soundboard known as the crown. The crown’s job is to efficiently transmit the vibrations of the strings from the soundboard into the surrounding air. 

Yamaha piano engineers call on generations of know-how and craftsman’s skill to construct soundboards that vibrate easily and achieve powerful projection. In creating the SX Series, Yamaha borrowed techniques used in the flagship CFX for attaching the soundboard, ribs, and bridge. The resulting soundboard assembly is carefully integrated into the piano body, where it delivers outstanding projection throughout any concert venue. 

Made from specially selected strong European spruce, the SX Series soundboard is built to withstand stress and retain its shape. Throughout its playing life, it promises to deliver rich overtones, low decay, and a wide range of expressive tonal colors.

Hand-winding piano strings is an extremely demanding task that can only be performed by seasoned experts. As they wind pure copper around the core steel string, Yamaha craftsmen must delicately adjust the balance and tension of the strings. Those hand-winding piano strings are pliable and they bring overtones in better harmony with fundamental frequencies. What this means to your ears is a beautifully resonant sound with satisfying overtones.

The clean, modern design and graceful curves of the SX Series are the physical counterpart to its elegant and expressive sound. Taking the best from the forerunner S Series and augmenting it with practical innovations, the SX Series takes its place on the stage as a thoroughly contemporary piano.



S6X

Crafted by Yamaha in Kakegawa, Japan 
Soundboard: European Spruce
Soundboard Ribs: European Spruce
Back Posts: 3 - Spruce
Bridge Construction: Two-piece separated
Frame: V-Pro Vacuum Shield Mold Process
Tone Collector: Yes
Key Material: Seasoned spruce
White Key surfaces: Ivorite™
Black Key surfaces: Wood composite
Fallboard: Soft-close 
Lid lock: Yes
Pedal: Shift/Sostenuto/Damper
Caster: Heavy duty double-wheeled solid brass casters with locks
Weight: 859 lbs (390 kg)