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Everything In Music Since 1958
Everything In Music Since 1958

Casio CT-S400 Portable Digital Piano

by Casio
Original price $369.99
Original price $369.99 - Original price $369.99
Original price $369.99
Current price $249.99
$249.99 - $249.99
Current price $249.99
♫ In stock
About Inventory Status

Call or text us at 301-946-8808.

In stock: It is in stock and available to ship or pickup. Apparel must be shipped from another location and is not available for in-store pickup. We can usually ship or have these items available for pickup by the next business day if they don't require inspection, special handling, or setup. Our pickup location is 11151 Veirs Mill Rd. Silver Spring, MD 20902.

📆 Preorder: It is on the way to our warehouse. We can't predict when preorder items will arrive due to current supply chain issues. If you place an order for one of these items someone will contact you to estimate the delivery date.

Out of stock: We don't currently have it available but you're not out of luck yet. We still may be able to get it. If you order one of these items we will contact you with an estimated fulfillment date. You have the option to cancel the order if you change your mind.

Special order: The item is so special that it needs to be custom ordered for you. Some of these items are works of art and have to be made individually. Orders for special order items must be prepaid and we cannot accept cancellations or refunds.

█ Sold out: We don't think we can get this item because it was either discontinued by the manufacturer or was limited in quantity. If you want or need this item call or text us. Sometimes we can help you track down the item through other sources or help you find something similar.

About Item Conditions

Call or text us at 301-946-8808.

New: The item is brand new as received from the manufacturer with a full manufacturer warranty. Instruments such as guitars, snare drums, drum kits, brass and woodwind instruments may be opened for photography and quality control inspection and may not be in a factory sealed box.

Mint or Open Box: The item may have been opened and tested but has been repackaged. The original packaging may have superficial issues but the item itself and any originally included accessories are in perfect, like new condition.

Display Model: These items are so cool that we put them on display in our legendary shop. The condition is brand new as received from the manufacturer with manufacturer warranty. Rest assured, these items undergo a very careful inspection before shipping.

Demo: These items have been on our sales floor for demo purposes and will likely show signs of use. The original packaging may no longer be included, but you can be assured that you are receiving an awesome item and an awesome price.

Used: The item is used. These item may have varying degrees of wear. Please read the description for information about the condition of the item. Used items do not carry a warranty.

B or C Stock: Factory refurbished. These items were purchased from the manufacturer in a refurbished condition. They will show some cosmetic issues, but nothing that would impact performance. Being that these are sealed from the manufacturer, we generally do not open these to photograph the cosmetic issues. They are guaranteed to work and may have a limited warranty or you may purchase an extended warranty in some cases. Please see the listing description for item specific information.

Educational & Government Sales Quotes

Click here to inquire about an educational or government quote and discover more about our Educational & Government Sales Division.

Live Life Out Loud With The Casio CT-S400 Portable Digital Piano

Whether you're making music just for you, or to bring joy to others, your creativity will flourish with the CT-S400. If you’re sparking a new passion for music, or reigniting an old flame – this keyboard is the perfect home for all. This little firecracker packs immense power into a compact package, offering versatile tones, rich audio, and limitless possibilities for fun. Indulge in the feeling of making music anywhere and with anyone. The CT-S400 will bring endless delight and inspiration to your world. Unleash your passion with the Casiotone CT-S400.

Lifelike Sound. Always With You

Connect deeply with the true essence of sound. Vivid and clear piano tones are just the tip of the iceberg. Rejoice in the vivid tones of the AiX Sound Source and delight in expressive, high-resolution voices as they shine through Casio’s new and unique acoustic system, ensuring you experience a fresh, powerful sound that will never fail to enhance your creativity. Who would have thought that such a compact design could produce this level of luscious timbre and true-to-life sound? Experience music in your way in the comfort of your room.

Your Keys to Creativity

The CT-S400 - more than your average keyboard. It's your companion for learning, exploration and creativity. Enjoy the flexibility of switching up your playing as you improve. The keyboard evolves along with your style. Practice and play along with your favorite music or automatic accompaniment. Connect with an app or external device. Your experience is limited only by your imagination. With everything for everyone, it doesn’t matter what level you’re at - the CT-S400 will unlock a new creative you.

Sounds to Inspire Your Playing

Redefining what makes a ‘real’ instrument, the CT-S400’s AiX Sound Source technology interprets the expressive complexity of musical instruments. With a rainbow of sounds to choose from, you never need to stop playing. Piano, strings, brass, synthesizer, bass and drums - 600 tones mean you are no longer restricted to one genre and the world of music is yours to explore. Which one will inspire you today?

The Sound of a Great Time

Despite the CT-S400’s compact size, Horizontal Bass Reflex technology boosts the lows and, together with custom speakers, brings powerful and vivid sounds to life. Add the surround sound function and truly experience the vibration and power of pure music. Let the Volume-Sync EQ function take control as it automatically adjusts the balance between bass and treble, maintaining a punchy, vibrant sound, even at lower volumes. Touch the pleasure of sound and experience rich audio from the comfort of your home.

Now, that’s music to our ears.

Get Right to the Good Stuff

With only the essential buttons on the CT-S400’s console panel, and a large dial to select tones and change settings via the LCD screen, the familiar keyboard layout ensures an intuitive experience. Maximize inspiration with My Setup. Program in a range of functions to suit your needs. Assign your favorite settings to each of the 5 buttons underneath the LCD screen and easily access them again with a single touch as soon as you’re ready. Customize the CT-S400, and make your music about you.

You Play the Keys, Casio Brings the Band

The CT-S400 brings the ensemble to you. With 200 rhythmic patterns from a vast range of genres, you can play along to any of your favorite tunes. Replicate the exhilaration of playing alongside other musicians using the automatic backing function with any of the 160 built-in songs. Customize settings and make the performance your own by changing the tempo and selecting left-hand or right-hand parts to play along with and individually practice. Maintain your enjoyment - it’s all about stress-free practice at your own pace.

A Musical Partner That's Always Close at Hand

Powerful meets compact. The CT-S400’s slim design means it’s easy to move and set up anywhere. Make music in any location, with or without a stand or desk. Ideal - even when space is limited - thanks to the handy strap pins. The CT-S400 will always be by your side and ready to play.

Smart, Creative, and Connected to Your World

The CT-S400 offers countless ways to enjoy the thrill of music. Listen to the music from your smartphone or tablet through the powerful keyboard speakers by using the Wireless MIDI & Audio Adaptor WU-BT10 (sold separately). Access the score of each built-in song with the Chordana Play app. Customize melodies in Audio Mode by changing the key and tempo, or by using the ‘cancel melody’ and ‘cancel accompaniment’ buttons to turn your favorite music into a backing track, allowing you to play along. Use the MIDI capability in Lesson Mode to display piano roll, making practice fun! Connect to other MIDI-enabled apps and external devices to individualize your lessons - throw away your old notions of practice, get creative and have fun.

  • Touch Response - Add intensity and rich expression to each note you play
  • Layer Function - Expand your performance range by layering two tones
  • Split Function - Divide the keyboard to play different tones
  • Metronome - Keep time in practice and performance
  • Registration - Save up to 32 sets (8 banks of 4 settings each), such as tone and rhythm
  • MIDI Recorder - Record your performances and play them back
  • Pitch Bend Wheel - Allow manual variations in pitch, giving your performance more flair and emotion
  • Phones/Output Jack - Tuck yourself away from the world around you as you play


  • Keyboard
    • Number of Keys: 61
    • Touch Response: 3 sensitivity levels, off
  • Sound Source: AiX, Polyphony: 48
  • Tones: 600
  • Layer: 3 (Upper 1/2, Lower 1)
  • Split: Yes
  • Sustain: Yes
  • Effects
    • Reverb: 20
    • Chorus: 10 (+Preset for each tone)
    • DSP: Yes (Preset for each tone)
    • Master EQ: 10
  • Volume-Sync EQ: Yes
  • Surround: Yes
  • Accompaniment
    • Number of Rhythms: 200
    • One Touch Preset: 200
    • Auto Harmonize: 12
    • User Rhythms: 10
    • Chord Mode: CASIO Chord, Fingered 1, Fingered 2, Fingered On Bass, Fingered Assist, Full Range
    • Rhythm Elements: Intro, Normal, Normal-Fill, Variation, Variation-Fill, Ending, Synchro Start, Synchro Stop
  • Metronome: Yes
    • Tap Tempo: Yes
  • Arpeggiator: 100
  • Songs: 160
    • Lesson Part Select: Yes
    • User Songs: 10
    • Demo Song: 1
  • Registration: 4 set x 8 bank
    • Freeze Function: Yes
  • My Set Up Function: Yes
  • Transpose: -12 to 0 to +12 Semitones
  • Tuning: A4 = 415.5 Hz to 440.0 Hz to 465.9 Hz
  • Octave Shift: -3 to 0 to +3 Octaves
  • Scale Setting: Equal temperament + 16 variations
  • MIDI Recorder: Yes
    • Songs: 5
    • Tracks: 6 (1 system track, 5 solo tracks)
    • Memory Capacity: 40,000 notes (for each song)
  • General MIDI: Yes
  • Bluetooth® MIDI/Audio: Yes (with optional adaptor)
  • Supported App(s): Chordana Play
  • Terminals
    • PHONES/OUTPUT: Stereo mini
    • PEDAL: Standard
    • AUDIO IN: Stereo mini
    • USB TO HOST: micro B
    • USB TO DEVICE: Yes
  • LCD: Yes
    • Type: Full-dot
    • Back Light: Yes (white)
  • Pitch Bend Wheel: Yes
  • Strap Pin: Yes
  • Speakers: (13cm x 6cm) x 2
    • Horizontal Bass Reflex: Yes
  • Amplifiers: 2.5W + 2.5W
  • Power Supply
    • AC Adaptor: AD-E95100L (DC 9.5V)
    • Battery: AA-size alkaline batteries x 6 or AA-size rechargeable nickel metal hydride batteries* x 6
    • Battery Life: Approximately 4 hours continuous operation*
  • Power Consumption: 7.5 W
  • Dimensions: 930 x 258 x 84(mm)
  • Weight: 4.5kg
  • Included Accessories: Music stand, Strap lock
  • Optional Accessories (sold separately)
    • Pedals (SP-3, SP-20)
    • Headphones (CP-16)
    • AC adaptor (AD-E95100L)
    • Wireless MIDI and Audio Adaptor (WU-BT10)
    • Special Stand (CS-2X)
    • Benches (CB-7, CB-30BK, CB-30BN)
    • Carrying Case (SC-650B)

* Measured values while using eneloop batteries. eneloop is a trademark of Panasonic Corporation. Actual continuous operation time may be shorter due to battery type, performance type, and usage environment.

Manufacturer: Casio
Model: CT-S400
SKU: I666114-N-4-WHXX
UPC: 079767315108

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Maryland, Virginia, and Washington DC's legendary music shop. Family-owned and operated since 1958. Buy gear the way it was meant to be bought, from a store that's been there through it all and has the vibe to prove it. We're staffed with musicians and industry experts, people that live and breathe music gear. Our mission is to help you find the right gear for your project, that thing that will bring you the most joy out of what you do. We're an authorized dealer for almost every brand, we stock items the other stores don't, so you can try before you buy. Stop by our Wheaton, MD showroom and see for yourself.

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