Kawai K300 ATX4 Silent Upright in Polished Ebony


Currently In Stock

The Kawai K300 builds upon the success of its awardwinning predecessor, the K3, that was named Acoustic Piano of the Year in four consecutive years. The K300 proudly extends this distinguished legacy. An ATX4 silent feature has been added to this K300.

  • Height: 122 cm
  • New ATX4 Silent system
  • Improved SK-EX Sound Rendering
  • New virtual technician function with 21 adjustable parameters
  • Integrated Bluetooth® MIDI and Audio wireless connectivity
  • Dedicated PianoRemote control app for iOS and Android
  • Double felted, mahogany core hammers
  • Millennium III action
  • Slow-close fallboard
  • Double casters
  • 10 Year Warranty (5 years on electronic parts)
  • Free delivery to UK Mainland ground floor
  • Complimentary first tuning
  • Price matching (terms and conditions apply)
  • 0% finance available, subject to terms and conditions

Detailed Description


AnyTimeX4 (ATX4)

The latest hybrid acoustic piano from Kawai. Enjoy playing the acoustic piano at anytime, without disturbing anyone.

AnyTimeX4 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.

Analogue Action, Digital World

The AnyTimeX4 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 piano actions.

Equipped with Kawai’s most advanced digital and sound technologies, AnyTimeX4 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.

AnyTimeX4 (ATX4)


All AnyTimeX4 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 AnyTimeX4 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 then 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.

AnyTimeX4 (ATX4)

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 AnyTimeX4 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.

AnyTimeX4 (ATX4)

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 AnyTimeX4’s digital piano sound to behave just like an acoustic piano.

AnyTimeX4 (ATX4)

Rich Sound Selection

Supplementing the beautiful acoustic piano voices, the AnyTimeX4 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.

AnyTimeX4 (ATX4)

Modern Bluetooth Connectivity

Designed to meet the connectivity needs of modern pianists, AnyTimeX4 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, AnyTimeX4 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 AnyTimeX4 pianos are exclusively controlled via the 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.

AnyTimeX4 (ATX4)

New Aures Music App

(for iOS/Android devices, released February 2022)

Aures Music App Icon

The AURES Music app allows Kawai AURES AR2 and AnyTime ATX4 hybrid piano owners to enjoy listening to music streamed from a smartphone or tablet while playing the piano. The app links with popular music streaming services, and includes controls to adjust sound EQ and playback volume, as well as enable/disable the instrument’s digital piano sound engine and change tuning and transpose settings.

AURES Music takes advantage of the wireless Bluetooth MIDI and Bluetooth Audio technologies built into Kawai’s latest AURES AR2 and AnyTime ATX4 hybrid pianos, allowing players to enjoy listening to music played from through the instrument’s unique soundboard speaker system (or external speakers in the case of ATX4 models) from the comfort of an armchair, or to accompany their favourite artists at the keyboard. The app features a modern user interface that is designed for efficient touch control, with a choice of light or dark UI modes to match the player’s personal preference.

PiaBookPlayer app for iOS and Android

Excellent Headphone Sound Quality

The AnyTimeX4 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, AnyTimeX4 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.

Develped With MPA Supervision

To ensure that all AnyTimeX4 instruments match the premium quality and excellent playability of their standard acoustic upright and grand piano counterparts, Kawai’s R&D engineering staff worked closely with the company’s internal Master Piano Artisans (MPAs).

These extremely knowledgeable and experienced technicians supervised each stage of the AnyTimeX4 development process, to ensure that the instruments’ acoustic keyboard action remains exceptionally responsive and balanced, even when used to trigger the digital piano sound engine, and guarantee that the digital piano tonal characteristics and performance are as close as possible to that of an acoustic piano.

AnyTimeX4 (ATX4)


Generous Part Exchanges Available

Get in touch with us if you have an existing digital or acoustic piano that you’d like to part exchange with us, and we’d be happy to let you know how much it could be worth.

Height 122 cm
Width 149 cm
Depth 62 cm
Weight 228 kg
White Key Surfaces Acrylic
Black Key Surfaces Phenol
Action Millennium III
Hammer Felts All underfelted
Soundboard Solid Spruce, Tapered
Speaking Length of No.1 String 1,200 mm
Cutoff Bar 2
Agraffes No
Duplex Scaling No
Back Posts 5
Pedals Soft, Muffler, Damper
Casters Double, Brass
Softfall Yes
Lock No
Other Features Steel reinforced keyslip & keybed
Sensing System Integrated Hammer Sensing System (IHSS)
Muting System Hammer shank stopper (middle pedal)
Pedals Damper (half-pedal support), Soft, Sosutenuto (switchable from Soft for Upright Piano)
Digital Piano Sound ・SK-EX Rendering
– 88-key multi-channel piano sampling
– 88-key resonance modelling
– SK-EX recording

・Harmonic Imaging XL (HI-XL)
– 88-key stereo sampling
– SK-EX, SK-5, EX recording

256 note maximum polyphony

Piano Adjustment Virtual Technician (21 parameters)
No. of Sounds SK-EX Rendering : 10 rendering characters
Harmonic Imaging XL : 90 voices
Reverb SK-EX Rendering : Ambience (10 types)
Harmonic Imaging XL : Reverb (6 types)
Brilliance Yes
Other Effects 24 types
Control / Recorder App Control App: PianoRemote (iOS / Android)
Recorder App: PianoRemote App based Recorder (SMF/WAV/FLAC/AAC)
Display No
Basic Functions Dual, split, four hands, transpose, tone control, line in level, SHS mode, phones type, phones volume, MIDI setting, Bluetooth setting
Sound Demo 39 songs
Piano Music 29/42 songs (Depending on market location)
Lesson Songs 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)
Metronome 1/4, 2/4, 3/4, 4/4, 5/4, 3/8, 6/8, 7/8, 9/8, 12/8
Drum Rhythms 100 drum rhythms
Bluetooth Yes
USB to Host Yes
USB to device No
Power Consumption 20W

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