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An excellent introduction to the Classic Series range.

Combining the superb Responsive Hammer II weighted-key action, Progressive Harmonic Imaging sound technology with 88-key piano sampling, and an impressive 4 speaker output system, the elegant delivers grand piano touch and tone within a sleek polished ebony cabinet.




  • CS4CS4 Ebony Polish


  • CS4CS4 Ebony Polish



The Touch of a Grand Piano: Responsive Hammer II keyboard action

The CS4’s Responsive Hammer II keyboard action recreates the supreme touch of an acoustic grand piano, with its realistic movement and rigid, springless design providing a smooth and natural piano playing experience.

The instrument’s triple-sensor key detection system enhances responsiveness and accuracy, while structural reinforcements throughout the action assembly help to minimise noise and key wobble during staccato and fortissimo passages.



The weight of the keyboard is appropriately graded to mirror the heavier bass hammers and lighter treble hammers of an acoustic piano, while let-off simulation recreates the subtle ‘notch’ sensation felt when softly playing the keys of a grand piano. These important characteristics allow discerning pianists to practise their expanding repertoire with confidence, and ensure that there are no unpleasant surprises when called upon to perform using the finest acoustic grand pianos.



Triple sensor key detection

The Responsive Hammer II keyboard action utilises an accurate triple-sensor key detection system for enhanced playing realism.


The added third sensor improves responsiveness when playing the same key repeatedly, and unlike conventional two sensor keyboard actions found in many digital pianos, allows the sound of a single note to be gradually ‘layered’ without the previous tone being lost.


In addition, Kawai’s action technology also monitors the speed at which each key is lifted, influencing the release character of piano sounds, and providing a greater range of expression between staccato and legato playing.



Ivory Touch key surfaces

The impressive CS4 features Kawai’s highly regarded Ivory Touch key surfaces as standard.  This finely textured material gently absorbs fingertip perspiration and oils to assist playing control, and possesses a natural, matte finish that is smooth but not slippery.


Furthermore, this moisture is absorbed without dirt or grease permeating the surface, allowing the keytops to be wiped clean easily using just a damp cloth.



Let-off Simulation

As one of the most authentic digital piano keyboard actions in its class, Responsive Hammer II even reproduces the ‘let-off’ characteristic of acoustic piano actions. 


This subtle ‘notch’ sensation can be felt when playing the keys of a grand piano very gently, and may be used by experienced pianists to aid control when playing pianissimo passages.




The Sound of a Grand Piano: Kawai EX concert grand

The Kawai EX concert grand piano is widely regarded by professional pianists and piano technicians as one of the finest instruments within its class. Hand-built by Master Piano Artisans at the Shigeru Kawai Piano Research Laboratory in Ryuyo, Japan, each EX instrument undergoes a meticulous regulation and refinement process within a specially designed anechoic chamber.


Following this lengthy crafting period, the completed EX concert grand piano receives a final series of rigorous quality inspections, before eventually taking centre stage in the world’s most prestigious musical institutions and concert halls.



Full 88-key stereo piano sampling

The beautiful sound of the Kawai EX concert grand piano is at the heart of the CS4, with all eighty-eight keys of this world-class instrument painstakingly recorded, meticulously analysed, and accurately reproduced as high-fidelity digital waveforms.


Recording each key individually in this way, preserves the rich harmonic character of the EX concert grand piano, and guarantees that the sound heard when playing any one of the CS4’s weighted keys is a faithful representation of the original acoustic source.



Harmonic Imaging technology

When playing a fine piano, the amount of pressure applied to the keyboard affects not only the volume of the sound produced, but also the unique tonal character of each note.  Therefore, in order to construct a realistic acoustic portrait of the EX concert grand piano, not only is each key recorded individually, but also at various different volumes, ranging from gentle pianissimo to thunderous fortissimo.


The CS4 offers a highly detailed acoustic portrait, employing Kawai’s proprietary Progressive Harmonic Imaging sampling technology to ensure smooth tonal transitions across the keyboard and throughout the entire dynamic range.



Realistic reverberation

The CS4’s digital effects engine further enhances the instrument’s core sounds, applying additional reverberation effects that simulate the acoustic environment of a recital room, live stage, or concert hall, bringing performances to life. 


The result is a rich, vibrant piano tone that delivers breathtaking realism and authenticity.




The Variety of a Digital Piano: Convenience & Flexibility

Complementing its beautiful appearance, stunning sound, and rewarding keyboard touch, the CS4 offers a selection of digital piano features that further enhance one’s musical enjoyment.  The 3-song recorder, Dual and Four-Hands playing modes, and alternative instrumental sounds add greater variety to players’ performances.


Furthermore, a convenient metronome function and integrated Czerny and Burgmüller etudes or Alfred course books ensure that regular practise is both productive and engaging for aspiring pianists.



Additional sounds & playing modes

Supplementing the beautiful acoustic piano voices, the CS4 also features a modest selection of additional sounds, ranging from electric pianos and drawbar or church organs, to strings, human choirs, and synth pads, inviting musicians to add greater variety to their performances.


Furthermore, the Dual playing mode also allows two different sounds, such as grand piano and strings, to be layered together, while the Four Hands mode divides the keyboard into two independent 44-key sections.  This feature is particularly useful in learning environments, allowing teacher and student (or student and student) to play together at the same time using a single instrument.



Built-in lesson function

The CS4’s convenient lesson function allows aspiring pianists to learn piano with classical Burgmüller and Czerny etudes, or song collections from the popular Alfred’s Basic Piano course books.


The left and right hand parts of each etude/song can be practiced separately, using the adjustable metronome feature to perfect timing in difficult passages, before recording the completed piece for self-evaluation.

* Notated scores and Alfred lesson books sold separately.

* Lesson song content dependent on market location.



Grand Feel Pedal System

Reinforcing the Classic Series’ reputation as the most realistic digital pianos in their price range is Kawai’s Grand Feel Pedal System.  This unique feature replicates the individual weighting of the damper, soft, and sostenuto pedals of a Kawai EX Concert grand piano to further enhance the CS4’s acoustic piano-like authenticity.



Energy conservation

The CS4 utilises energy-efficient components that reduce electricity consumption by over 60% compared to previous models.


Furthermore, the instrument’s optional power saving feature can also turn off the piano automatically after a specified period of inactivity, thus preventing unnecessary energy use.




The Design of an Acoustic Piano

Standing proudly amongst other items of fine furniture, a piano is often considered the centrepiece of any room it occupies.  With elegant cabinetry, striking brass accents, and a luxurious high-polish finish, the exterior appearance of a piano contributes more to the overall aesthetic of playing and listening to music than arguably any other instrument.


This shared belief inspires Kawai’s digital and acoustic piano designers to work together, combining modern ideas with traditional philosophies to conceive truly stunning musical instruments.



Beyond ebony polish

Rather than simply replicate Kawai’s existing digital pianos in a polished ebony finish, the Classic Series design team decided to take a rather different approach.


They began by studying acoustic pianos – evaluating the characteristics that define an instrument’s personality, before modelling the Classic Series cabinets around these core qualities.



Distinguished presence

One important design feature of the CS4 is its tall upper board.  Combined with a broad music rest, this large, polished area elevates the piano, and gives the relatively compact instrument a grander, more distinguished presence.


Single-piece side panels further contribute to the Classic Series’ acoustic piano character, with the refined toe block overlap ensuring a clean, elegant finish.



Keyboard ・ Responsive Hammer II action
 - 88 keys
 - Grade-weighted hammers
 - Ivory Touch white key surfaces
 - Let-off simulation
 - Triple sensor key detection
Pedal ・ Grand Feel Pedal System
 - Damper (with half-pedal support)
 - Soft
 - Sostenuto
Piano Sound ・ Progressive Harmonic Imaging (PHI)
 - 88-key stereo sampling
 - EX recording
 - 192 note maximum polyphony
Piano Resonance - Damper Resonance
Piano Adjustment Virtual Technician (3 parameters)
No. of Sounds 19 voices
Reverb 6 types
Other Effects -
Output System
Speakers 12 cm x 2
5 cm x 2
Output Power 40 W (20 W x 2)
Headphone Enhancements -
Display -
Key Cover Sliding type
Music Rest Detachable type
Dimensions Width 141.5 cm
Depth 42.5 cm
Height 91 cm (not including music rest)
Weight 54 kg
Available Finishes Ebony Polish
Basic Functions Dual
Four Hands
Internal Songs Sound Demo 15 songs
Piano Music 29/42 songs *
Concert Magic 40 songs
Lesson Songs Burgmüller 25 (25 Etudes Faciles, Opus 100)
Czerny 30 (Etudes de Mécanisme, Opus 849)
Beyer 106 (Vorschule im Klavierspiel, Opus 101)

or *

Alfred’s Basic Piano Library Lesson Book Level 1A
Alfred’s Basic Piano Library Lesson Book Level 1B
Internal Recorder Total Memory approximately 10,000 notes
No. of Songs 3 songs
Parts 1 part
Metronome Time Signatures 1/4, 2/4, 3/4, 4/4, 5/4, 3/8, 6/8
Drum Rhythms -
External Connectivity
USB Audio Recorder Record/Playback -
Other Functions -
App Functions -
Connector Jacks Headphone 2 x 1/4" Stereo jacks
Line Out -
Line In -
USB to Host -
USB to Device -
Others -
Power Supply
Power Consumption 20 W
Included Accessories
Power Power cable
AC adaptor
Bench Height-adjustable bench *
Headphones Headphone hook
Sheet Music Classical Piano Collection *
Others Warranty Card *
Owner's Manual

* Depending on market location. Specifications are subject to change without notice.