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The Casio GP-300 Celviano Grand Hybrid digital piano represents the perfect fusion of innovation and tradition. Its Natural Grand Hammer Action keyboard employs the same materials and processes as a C. Bechstein concert grand piano, resulting in an uncompromising playing experience. The GP-300's trio of expressive grand piano re-creations sound incredibly authentic, thanks to its six-speaker amplification system. The GP-300's ultra-realistic damper, soft, and sostenuto pedals will take your playing to new levels of intensity. Complete with onboard DSP, the Casio GP-300 Celviano Grand Hybrid digital piano ensures that every performance is an inspired one.

Casio GP-300 Celviano Grand Hybrid Digital Piano at a Glance:

  • Natural Grand Hammer Action keyboard delivers authentic piano feel
  • Three legendary grand pianos yield realistic piano sound
  • Grand Acoustic System creates a realistic piano presence

Natural Grand Hammer Action keyboard delivers authentic piano feel

The Casio GP-300 Celviano Grand Hybrid's uber-realistic Natural Grand Hammer Action keyboard is spot-on. The vertical path, weighting, and pivot points of its full-length wooden concert grand piano keys are virtually identical to that of a real concert grand, and the keys use the same materials and processes as a C. Bechstein concert grand piano. 

Three legendary grand pianos yield realistic piano sound

Employing Casio's AIR Grand Sound Source, the GP-300 Celviano Grand Hybrid provides you with three pianos dubbed the Berlin, Hamburg, and Vienna Grands. Countless hours of analysis and study went into designing these three unique sounds, and it shows. These pianos not only deliver gorgeous tones, their string/damper resonance, mechanical sounds, and other subtle nuances really hit the mark. Playing the GP-300 is almost like owning three of the world's most sought-after pianos!

Grand Acoustic System creates a realistic piano presence

The Casio GP-300 Celviano Grand Hybrid is packed with a specially designed six-speaker amplification system that delivers the three-dimensional sound field that's created by a real acoustic grand piano. The top speakers replicate the sounds you'd normally hear rising upwards, and the downward-facing speakers mimic the sounds you'd normally hear from below the soundboard. Whether you're performing or listening, the GP-300 sounds full and rich.

Casio GP-300 Celviano Grand Hybrid Digital Piano Features:

  • Natural Grand Hammer Action keyboard with realistic full-length wooden keys
  • 3 sensitivity levels for expressive playing
  • AIR Grand Sound Source delivers 3 realistic piano sounds
  • Authentic-sounding damper resonance, damper noise, hammer response, string resonance, and lid simulator
  • Ultra-realistic damper, soft, and sostenuto pedals
  • 6-speaker Grand Acoustic System creates a realistic piano presence
  • 26 preset tones, 60 preset songs, and 10 programmable songs
  • Record up to 99 songs with FF, REW, PAUSE, STOP, and REPEAT controls
  • Onboard DSP creates polished, studio-quality sound



    • AiR Grand Sound Source
    • Natural Grand Hammer Action Keyboard
    • Concert Play

    AiR Grand Sound Source
    Wooden keys
    Number of Keys 88
    Number of Keys 88
    Natural Grand Hammer Action Keyboard
    Touch Response : 5 sensitivity levels
    Maximum Polyphony 256
    26 built-in tones
    Tunes 60
    60 Tunes
    Lesson Function
    Lesson Function
    Amp Output : 30W x 2 + 20W x 2



    Three Legendary Pianos
    Their individual character and tone faithfully recreated

    CELVIANO Grand Hybrid reproduces even subtle nuances of the world’s most respected pianos. Three pianos that originate in Berlin, Hamburg and Vienna were chosen for this project. CASIO has painstakingly researched and analyzed the unique characteristics of each piano. CELVIANO Grand Hybrid delivers brilliant sound of these pianos reproduced with CASIO’s advanced technology. It will provide the experience of owning three of the finest pianos on earth.

    Berlin [ Berlin Grand ]

    A balanced, elegant sound. Ideal for playing impressionistic music. Notable for its clear, ringing tone across the entire range.

    Hamburg [ Hamburg Grand ]

    A brilliant, rich sound. Loved by pianists for its wide range of expression. Well suited for various playing styles and genres.

    Vienna [ Vienna Grand ]

    Noted for its impressive low range. Great for both soft and vigorous playing with its warm tone. An ideal instrument for music from the classical period.

    Sound Development in Collaboration

    The Berlin Grand sound was developed in collaboration with C. Bechstein. CASIO sought a clear, balanced and elegant sound for CELVIANO Grand Hybrid. D282, C. Bechstein’s ultimate masterpiece, is the model CASIO intensively studied to achieve the goal. Mr. Albrecht, Service Director and Master Piano Maker at C. Bechstein, visited CASIO R&D to supervise the sound development process through the final modification.

    About C. Bechstein

    Since Carl Bechstein founded the Pianoforte production facility in Berlin in 1853, the name C. Bechstein has stood for the highest class of upright and grand pianos. C. Bechstein pianos have been appreciated by many famous composers and artists for their finest quality of sound and touch for many years. In the 21st Century, C. Bechstein is still recognized as one of the world’s leading piano manufacturers.

    AiR Grand Sound Source

    The CELVIANO Grand Hybrid incorporates AiR Grand Sound Source, a newly developed system using CASIO’s state-of-the-art sound technologies. It includes many impressive features. Multi-dimensional Morphing delivers smooth changes between soft and strong playing. Acoustic Simulator reproduces the characteristics of sounds produced by acoustic grand pianos. The authenticity generated by the AiR Grand Sound Source ensures a pure piano experience.
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    Multi-dimensional Morphing

    On an acoustic grand piano, the volume and quality of sounds change from the time the keys are struck until they die away. CASIO's Multi-dimensional Morphing technology enables natural, smooth transitions in sound volume and tone based on the power of the keystroke. This technology contributes to more expressive performances.

    Resonance System

    The various types of resonance in a grand piano are crucial to the playing experience. The CELVIANO Grand Hybrid incorporates String Resonance, which exposes the harmonic relationships between various strings when keys are struck. Also Damper Resonance reproduces the resonance occurring when a damper pedal is pressed. CASIO's Resonance System reproduces the resonance of both the strings and sound board of a grand piano by selecting, controlling and synthesizing according to performance conditions.

    Key Off Simulator

    The lengths of the lingering sounds produced by a grand piano vary depending on the speed at which players release their fingers after pressing the keys. In a similar fashion, CASIO’s Key Off Simulator controls the length of these sounds based on the key’s release speed. This enables players to express delicate nuances when playing staccato and legato.

    Hammer Response

    The timing of a grand piano’s sound varies subtly depending on which keys are being played, even when the keys are struck with the same force. To achieve optimal authenticity, CASIO has installed appropriate settings for each of the three grand piano tones. The sound production timing can also be adjusted to suit the player.

    Grand Pedal System

    Grand Pedal System

    By continuously sensing and detecting the position of the damper pedal, CASIO’s Grand Pedal System enables fine-tuning of the damping volume and note length depending on the degree of pedal depression. In addition, the Half Pedal Position function permits adjustment of the depression position at which the damping effect comes into play according to the player's preference. The Action Sound System’s Damper Noise and Pedal Action Noise features, in the case of the GP-500BP, reproduce even subtle operating sounds like that experienced with an acoustic grand piano.

    Grand Acoustic System

    Grand Acoustic System

    CASIO has developed a new dedicated speaker system for the CELVIANO Grand Hybrid that reproduces the characteristics of sound emanating upwards and downwards from an acoustic grand piano. The four-channel audio system incorporates six speakers, carefully positioned in a structural design that releases sound outward from the interior of the body. The system delivers the same sound field experience a player would enjoy while playing an acoustic grand piano.

    Adjustable Lid Position & Lid Simulator

    Adjustable Lid Position

    The CELVIANO Grand Hybrid’s design includes a top panel that can be manually raised and lowered. The lid’s position not only physically affects the sound coming from the upper speakers, but also works in conjunction with the “Lid Position” setting to accurately duplicate the characteristics of the adjustable lid on an acoustic grand piano.
    The volume and timbre of sound produced by a grand piano change depending on the degree to which the lid is open or closed. The Lid Simulator simulates these acoustic effects digitally. Pianists can select among four settings for opening and closing stages and enjoy playing music with the piano sound effect of their choice.

    *The Lid Simulator’s setting value remains unchanged, regardless of whether the piano's top board is open or closed.

    Hall Simulator & Listening Position

    Listening Position

    Twelve types of Hall Simulator are included; each one based on careful analysis of the acoustic characteristics of a world-famous concert venue. Each space has a total of four Listening Position settings. For example, the pianist can simulate the experience of hearing the piano from a seat in the audience, as opposed to the playing position.

    Volume Sync EQ

    Volume Sync EQ is especially useful for quiet playing at home and other times when you want to keep the speaker volume low. This function balances the sound at low volumes by adjusting the sound quality in the low and high registers. The result is a constantly pleasant playing experience, no matter where the volume is set.

    Volume Sync EQ
    When the piano is played at low volume, natural sound is maintained through compensation of the tone in the low and high ranges.

    Headphone Mode

    Headphone Mode

    Headphone Mode automatically creates a spacious sonic image while wearing headphones, recreating the feeling of playing an acoustic piano. With the experience of wearing headphones significantly enhanced, pianists can enjoy playing naturally and feeling the sound field of a traditional grand piano.


    Your performance demands authenticity
    It begins at the first touch

    The player’s movement is transformed into music with many important factors. The most tangible factor is the keys. CELVIANO Grand Hybrid delivers authenticity from the first touch. The revolutionary new Natural Grand Hammer Action keyboard is made with full-length, wooden keys. Its new mechanism incorporates real hammers that follow the same path of motion as in a concert grand piano. When the lid is lifted, you can see the hammers in motion through a clear panel as you play. Going beyond a standard acoustic mechanism, this new action allows faster note repetition than acoustic pianos, while maintaining a true piano touch.

    Natural Grand Hammer Action Keyboard

    For an authentic piano touch, CASIO has developed a new keyboard system called the “Natural Grand Hammer Action Keyboard”. This keyboard system features full-length wooden keys as well as hammers that follow the same path of motion as in a concert grand piano. CELVIANO Grand Hybrid features keys that are manufactured using exactly the same materials as acoustic grand piano. Careful attention is paid not only to finish of the surfaces of the keys but also to the quality of the wood employed for the key beds. This combination of an outstanding action mechanism and superior-quality key materials further enhances the sensation of playing an acoustic grand piano.
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    Natural Grand Hammer Action Keyboard

    1. Original Tri-Sensor action mechanism

    The core of CELVIANO Grand Hybrid’s keyboard performance is created by CASIO's proprietary action mechanism. This mechanism includes a hammer movement modeled from a grand piano and three sensors, which accurately capture a performer expression from the keys. Since there are no physical strings, CASIO's action is able to exceed the performance characteristics of a grand piano, providing superior playability that enables pianists to perform such actions as trills and repetitive notes with ease.

    2. Keyboard surface materials

    The use of acrylic for the white keys and phenol for the black keys — the same materials that modern grand pianos employ. This creates a welcome and familiar touch. Pianists will feel comfortable and confident on the keys of CELVIANO Grand Hybrid.

    3. Fulcrum distance from keys

    The position of the fulcrum with respect to the keys is exactly the same as with a grand piano. This contributes to stable playing performance, since the touch is never heavier or lighter depending on the position at which a finger strikes a key.

    high-quality Austrian spruce

    The keyboard is made of the same high-quality Austrian spruce as the keyboards on C. Bechstein grand pianos. Careful attention is paid to drying and processing of this high-quality material before keyboard construction begins.


    The keyboard is developed to ensure superior piano performances by considering each of the 88 keys independently and how they perform together as a single unit. Perfection of the keyboard is pursued as well through attention to such factors as load changes and key return speeds.

    Cpmparison of keyboard

    Beyond simply detecting the overall force of a key being played, the entire travel of the key is precisely modeled after the behavior of a grand piano


    The Grand Hybrid experience goes far beyond playing piano

    Play a legendary space

    CELVIANO Grand Hybrid includes a Hall Simulator featuring numerous world-class performance venues. Using advanced analysis and signal processing, CASIO has recreated the acoustic characteristics of renowned concert halls, opera houses, cathedrals and other performance spaces around the world. You can instantly select one of these settings, creating an immersive atmosphere for your performance.
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    Play with a symphony orchestra

    CELVIANO Grand Hybrid’s Concert Play feature gives you the role of solo pianist with an orchestral performance. The sound system plays the orchestral part accompanying you. Works by Tchaikovsky, Pachelbel, Smetana and others are featured. The tempo of these pieces can be slowed down to facilitate practice.
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    Concert Play

    Playing with an orchestra is an extraordinarily thrilling event. Concert Play feature demonstrates orchestral performance for a pianist to enjoy an experience of playing as a soloist accompanied by a full orchestra. 15 pieces of music are built in. When you practice, a convenient playback function offers capabilities of play, pause, fast-forward, rewind and A-B segment repeat. Using a Slow Mode, the tempo of these pieces can be slowed to 80% of normal speed as needed.

    Learn more

    Versatile features

    Audio Recorder

    CELVIANO Grand Hybrid pianos have the ability to record performances on USB flash memory available on the market as stereo audio files (44.1 kHz, stereo .WAV format). Recordings can be stored or played back on a computer or transferred to CDs or other media. The piano’s built-in full playback function permits use of such features as pause, fast-forward, rewind and A-B segment repeat.

    *Software available on the market may be required for producing CDs.

    MIDI Recorder

    This function enables players to record their own performances freely in the CELVIANO Grand Hybrid’s memory. It helps users improve their playing skills by reviewing their own performances objectively afterwards. This full playback function permits use of such features as pause, fast-forward, rewind and A-B segment repeat during playback.

    Music Library

    CELVIANO Grand Hybrid includes 60 piano pieces in its “Music Library”. The scores for these pieces are included and CELVIANO Grand Hybrid’s features are ideal for learning. Left and Right hand parts can be practiced separately. Tempo can be changed and an A-B segment repeat allows you to practice a section of the piece. Each piece has a selected preset tone but players can enjoy their own choice from the Berlin Grand, Hamburg Grand and Vienna Grand tones.

    *Some musical scores are not published due to copyright issues.

    Duet Mode

    The keys to the left and right of center on the keyboard can be set to the same tonal range. This Duet Mode is convenient when two players, such as a parent and child or a teacher and student, practice together.

    Layer and Split

    The layer function enables pianists to overlap two types of tones, while the split function lets them separate tones into lower and higher blocks.

    Auto Power Off

    To conserve energy, CELVIANO Grand Hybrid will Automatically Power Off when the instrument has not been played for 4 hours.

    Ergonomic Interface

    Intuitive control of CELVIANO Grand Hybrid is possible through a simple, considerately designed control panel. The Berlin Grand, Hamburg Grand and Vienna Grand are easily accessed with dedicated buttons for each piano tone.

    Natural Grand Hammer Action Keyboard (Sames wood as C. Bechstein grand pianos)
    Touch Response
    5 sensitivity levels (Heavy 2, Heavy 1, Normal, Light 1, Light 2), Off
    Sound Source
    AiR Grand Sound Source
    String Resonance, Damper Resonance, Damper Noise, Hammer Response, Lid Simulator, Key Off Simulator
    Maximum Polyphony
    Layer / Split
    Digital Effects
    Hall Simulator: 12 types, Listening Position Settings: Player's Position 1type, Listener's Position 3types, Chorus: 4 types, Brilliance: 7 levels, DSP: (Preset for some tones)
    Built-in Songs
    Concert Play (Audio Song): 15, Music Library (MIDI Song): 60, Grand Piano Tone Demo: 6
    Song Expansion
    10 Approx. 900KB (Up to approx. 90KB/song)
    Lesson Function
    Right hand off, left hand off, both parts off
    Beats: 0 to 9 (Tempo range: quarter note = 20 to 255)
    [MIDI Recorder] 2 tracks x 1 song, approximately 5,000 notes maximum, real-time recording/playback
    [Audio recording] Max. 99 songs approximately 25 min/song (44.1kHz WAV Format)
    Other Functions
    • Number of Preset Temperaments: 17
    • Top Board Open / Close
    • Volume Sync EQ: 3 levels, off
    • Headphone Mode
    Key Transpose
    2 octaves (-12 semitones ~ 0 ~ +12 semitones)
    Tuning Control
    A4 = 415.5Hz ~ 440.0Hz ~ 465.9Hz
    Grand Pedal System
    3 pedals(Damper, Soft, Sostenuto)
    Half Pedal Effect for Damper: Continuous recognition, 5levels position
    IN / OUT
    16 cm x 2 + (10 cm + 5 cm)x 2
    3-way, 6-speakers
    Amp Output
    30W x 2 + 20W x 2
    Input/Output Terminals
    • MIDI IN / OUT
    • PHONES / OUTPUT: 2 (Stereo standard)
    • LINE IN: 2 (L / MONO, R), Standard jack
    • LINE OUT: 2 (L / MONO, R), Standard jack
    Power Requirements
    AC Adapter : AD-E24500LW
    Dimensions (W x D x H)
    1,434×489×963 mm (w/o score stand)
    77.5 kg
    Body Color/Finish
    Satin Black
    Included Accessories
    Score Stand, Score Book, Bench, AC Adapter
    More Information
    Brand Casio
    Brand From Japan
    Made In China
    Length (cm) 143.4
    Width (cm) 96.3
    Warranty Terms 1 year local supplier warranty
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