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K-300 ATX4

Enjoy playing the acoustic piano at anytime, without disturbing anyone.


AnyTime ATX4 upright and grand piano instruments combine specially developed acoustic muting features with class-leading digital technologies, allowing pianists to enjoy the pleasure of owning and playing a traditional acoustic piano, while also being able to practise discretely at any time using private headphones.


■  Based on professional Kawai acoustic upright/grand pianos
■  Advanced acoustic piano muting systems for silent playing
■  Flagship SK-EX Rendering multi-channel digital piano sound
■  Flexible Virtual Technician function with 21 adjustable parameters
■  Premium audio processing and headphone amp technology
■  Integrated Bluetooth® MIDI and Audio wireless connectvity
■  Dedicated PianoRemote control app for iOS and Android
■  Developed under supervision from Master Piano Artisans

Analogue action, digital world

The AnyTime ATX4 hybrid instruments blend Kawai’s masterful acoustic piano craftsmanship with advanced digital piano technologies. Each piano begins with the solid foundation of Kawai’s award-winning upright and grand pianos, offering class-leading features such as the Millennium III action, considered to be the world’s finest upright and grand piano actions.

Equipped with Kawai’s most advanced digital and sound technologies, AnyTime ATX4 instruments are also premium digital pianos that can be played silently with headphones. Players can practice new pieces in silence using a variety of high quality sounds, use the built-in metronome then record their performance, or play along with tracks from a Bluetooth-connected smart device.

All AnyTime ATX4 upright and grand piano instruments incorporate Kawai’s specially developed acoustic muting systems which effectively prevent the action’s hammers from striking the strings, thus silencing the sound of each note when played.

Integrated Hammer Sensing System

The AnyTime ATX4 pianos’ precise hammer movements are measured with Kawai’s Integrated Hammer Sensing System (IHSS), which utilises high-resolution contact-less optical sensors to provide greater accuracy than conventional key-based sensor systems.

This more advanced approach reproduces the mechanical flow of the upright and grand pianos’ actions more closely, allowing the full range of dynamics to be expressed by the instrument’s powerful digital piano sound engine with natural fluency.

Shigeru Kawai SK-EX full concert grand      

The Shigeru Kawai SK-EX concert grand piano was conceived as the next step in evolving the art of the piano. Earning a reputation as the ‘premier piano of Japan,’ it graces the stages of concert halls and musical institutions around the globe, receiving universal acclaim for its exceptional clarity and dynamic range.  The SK-EX has frequently been selected by professional pianists at such prestigious events as the Chopin, Tchaikovsky, and Rubinstein international piano competitions.  With its magnificent tone and wonderfully responsive touch, the SK-EX can best be described with one word – incomparable.

Flagship Digital Piano Sound Engine   

The AnyTime ATX4 instruments incorporate Kawai’s latest digital piano sound technologies from the highly regarded Concert Artist and Novus product lines. When playing through headphones, pianists can enjoy the beautiful sound of the flagship Shigeru Kawai SK-EX full concert grand piano, stunningly reproduced using the advanced SK-EX Rendering sound engine.

Multi-channel Sampling                 

The SK-EX Rendering engine’s multi-channel sampling captures the sound from different points of the Shigeru Kawai concert grand. This modern technique not only allows a broader range of tonal characteristics to be recorded and reproduced, but also improves the connection felt between the keyboard and piano sound, resulting in a more lively and authentic response to changes in dynamics.

Full Resonance Modelling       

This naturally expressive Shigeru Kawai sound is further enriched by resonance algorithms which model the complex tonal interactions produced by the strings and various other parts of an acoustic piano. SK-EX Rendering generates resonances for the damper pedal and all 88 keys progressively, allowing the AnyTime ATX4’s digital piano sound to behave just like an acoustic piano.

Rich sound selection

Supplementing the beautiful acoustic piano voices, the AnyTime ATX4 pianos digital sound engine also features an excellent selection of additional instruments, 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 for a richer, more luscious tone, while the Split and Four Hands modes divide the keyboard into two independent sections with separate sounds for each. The volume balances and other settings for each playing mode can also be easily adjusted using the dedicated PianoRemote app.

Modern Bluetooth connectivity      

Designed to meet the connectivity needs of modern pianists, AnyTime ATX4 pianos feature standard USB and MIDI jacks for connecting to computers or other instruments, as well as Bluetooth® MIDI and Audio technology that allows wireless communication with supported smart devices. Once paired to a phone, tablet, or laptop, AnyTime ATX4 owners can enjoy a wide variety of exciting music-related apps that enhance their studying and playing experiences, or stream high quality audio directly through the instruments’ headphones without the need for any cables.

PianoRemote control app    

The digital features of AnyTime ATX4 pianos are exclusively controlled via the dedicated Kawai PianoRemote app, available for both iOS and Android devices.

PianoRemote provides a range of functions, including sound selection and customisation via the Virtual Technician feature, performance record and playback with integrated metronome, and a built-in piano music library consisting of hundreds of classical pieces to enjoy – all accessible from an attractive, intuitive user interface.  
PianoRemote app online manual  

PianoRemote app product page

Excellent headphone sound quality          

The AnyTime ATX4 pianos’ Spatial Headphone Sound (SHS) technology enhances the depth and realism of the instrument’s digital piano sound when listening through headphones or earphones.  The player can select one of three different acoustic presets that adjust the spatial positioning of the sound, while also helping to reduce auditory fatigue when using earphones or headphones for extended periods of time.

In addition to featuring a premium quality headphone amplifier, AnyTime ATX4 instruments also allow players to specify the type of headphones connected (Open, Semi-open, Closed, In-Ear, Canal, etc.) to ensure an optimal listening experience.

  • Acoustic
  • Action
  • Action
  • Millenium III
  • Key Surface
  • Acryl/Phenol
  • Hammer Core
  • Mahogany
  • Hammer Felt
  • with underfelt
  • Construction
  • max. String Length
  • 1200 mm
  • Sound Board Material
  • Solid Spruce, Tapered
  • Sound Board Size
  • 1,39 m²
  • Rips
  • 11
  • Back Posts
  • 5
  • Duplex Scale
  • no
  • Key Lid
  • Softfall
  • Lock
  • no
  • Casters
  • Double, Brass
  • Pedals
  • Soft, Muffler, Damper
  • Tone Spreader
  • yes
  • Dimensions
  • Height in cm
  • 122
  • Width in cm
  • 149
  • Depth in cm
  • 62
  • Weight in kg
  • 228
  • Finishes
  • Finishes
  • Black polished
  • Digital
  • Keyboard
  • Sensors
  • Integrated Hammer Sensing System (IHSS), optical sensors
  • Velocity Curves
  • Light 1-4, Normal, Heavy 1-4, Off
  • Sound Source
  • Sound Source
  • 88 key Multi-Channel Piano Sampling, 88 key Resonance Modelling + Harmonic Imaging XL 88 key Sampling
  • Sounds
  • 90
  • Polyphony
  • 256 notes max.
  • Virtual Technician
  • Touch Curve, Voicing, Resonance Depth1, Damper Resonance, Damper Noise, String Resonance, Undamped String Resonance, Cabinet Resonance, Key-off Effect,Fall-Back Noise, Hammer Noise, Hammer Delay, Topboard, Decay Time, Release Time, Minimum Touch, Stretch Tuning, Temperament, Temperament Key, Key Volume, Half-Pedal Adjust, Soft Pedal Depth, Tuning, Damper Hold
  • Keyboard Modes
  • Dual Mode, Split Mode, 4-hand Mode (HI-XL Sounds only, incl. Volume/Balance adjustment)
  • Reverb
  • Room, Lounge, Small Hall, Concert Hall, Live Hall, Cathedral
  • Effects
  • 24 Types: Chorus x 3, Delay x 3, Tremolo x 3, Autopan x 2, Phaser x 2, Rotary x 6, Combination x 5
  • Tuning
  • Equal (Piano Only), Pure (Major), Pure (Minor), Pythagorean, Meantone, Werckmeister III, Kirnberger III, Equal (Flat), Equal (Stretch), USER
  • Music/Recording
  • Metronome/Beats
  • 10 Beat Types + 100 Rhythm Pattern, Tempo and Volume adjustable
  • Recorder
  • Available with PianoRemote App
  • Lesson Function
  • Alfred’s Premier Piano Course Lesson 1A Alfred’s Premier Piano Course Lesson 1B Alfred’s Basic Piano Library Lesson Book Level 1A, Alfred’s Basic Piano Library Lesson Book Level 1B, Alfred’s Basic Adult Piano Course Lesson Book Level 1, Burgmüller 25 (25 Etudes Faciles, Opus 100), Czerny 30 (Etudes de Mécanisme, Opus 849), Czerny 100 (Hundert Übungsstücke, Opus 139), Beyer 106 (Vorschule im Klavierspiel, Opus 101), J.S. Bach: Inventionen, Sonatinen Album 1, Chopin Walzer (Chopin waltzes series 1-19), Chopin Etüden (Opus 10 Urtext)
  • Piano Music Songs
  • 204
  • Demo Songs
  • 39
  • Features
  • Display
  • Operation with PianoRemote App
  • Bluetooth
  • Bluetooth (Version 4.1; GATT compatible), Bluetooth Low Energy MIDI specifikation conform, Bluetooth Audio (Version 3.0, Profil: A2DP, Codecs: SBC, AAC, aptX)
  • Registrations
  • unlimited with PianoRemote App
  • USB Functions
  • USB MIDI, USB Update
  • Other Features
  • Tone Control, Wall EQ, Low Volume Balance, Speaker Volume, Spatial Headphone Sound, Headphone Type, Headphone Volume, Line In Volume, Bluetooth MIDI, Bluetooth MIDI Device Name, Bluetooth Audio, Bluetooth Audio Volume, MIDI Channel, Local On/Off, Transmit Program Change, Multi-timbral Mode, Channel Mute, Reset Sounds, Reset Music, Factory Reset, Auto Power Off, Language, System Information
  • Sound System
  • Power Consumption
  • 20W
  • Construction
  • Jacks
  • LINE IN (3,5mm Stereo Jack), LINE OUT (3,5mm Stereo Jack), Headphones x 2 (3,5mm Stereo Jack and 6,3mm Stereo Jack), MIDI (IN/OUT), USB to Host, USB for Updates

Specifications are subject to change without notice.

Copyright Kawai Europa GmbH