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Casio CTK-4000 61-Key Portable Keyboard

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The Casio CTK-4000 is an affordable instrument with a 61-Key Piano Style Touch Sensitive Keyboard with 570 total onboard Tones, 180 Rhythms, and Reverb plus Chorus Digital Effects. Packed with great f... Click To Read More About This Product

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The Casio CTK-4000 is an affordable instrument with a 61-Key Piano Style Touch Sensitive Keyboard with 570 total onboard Tones, 180 Rhythms, and Reverb plus Chorus Digital Effects. Packed with great features such as Casio's famous Step-up Lesson System, audio inputs for an MP3 player and a USB port for MIDI. All this makes CTK-4000 more realistic and expressive than ever before at this price range.

Runs on 6 "D" batteries (not included) or optional AD-5 AC power supply (see item # 703407).


  • Keyboard:
  • 61 standard-size keys
  • Touch response: 2 sensitivity levels, Off
  • Maximum Polyphony: 48 notes (24 for certain tones)
  • Tones:
  • Built-in tones: 570
  • Sampling tones: Up to 8 (Melody Sampling: 5, Drum Sampling: 3), Up to 10 seconds
  • Functions: Layer, Split
  • Digital Effects:
  • 10 Reverbs, 5 Choruses
  • Lesson:
  • Step-up lesson: 4 (Listen, Watch, Remember, Auto)
  • Lesson Part: L, R, LR
  • Functions: Repeat, Voice Fingering Guide, Note Guide, Performance Evaluation
  • Song Bank:
  • Built-in Songs: 152
  • User Songs: Up to 10
  • Music Challenge:
  • 20 notes
  • Auto Accompaniment
  • Built-in Rhythms: 180
  • User Rhythms: Up to 10 (Accompaniment Edit)
  • Chords: Fingered 1/2/3, CASIO Chord, Full Range Chord
  • Rhythm Controller: Accomp ON/OFF, Start/Stop, Synchro/Ending, Variation/Fill-in, Normal/Fill-in, Intro
  • Registration
  • 32 (4 setups x 8 banks)
  • Recorder
  • Realtime Recording, Playback
  • Keyboard Play: 5 Songs, 6 Tracks
  • Playing Along with built-in Songs:1 song (L, R, LR)
  • Memory Capacity: Approximately 12,000 notes (total for 6 songs)
  • Metronome
  • Beats per Measure: 0, 2 to 6
  • Tempo Range: 30 to 255
  • Other Functions
  • Transpose: +/-1 Octaves (12 semitones)
  • Octave ShiftUpper/ Lower +/-2 Octoves
  • Tuning: A4 = approx. 440 Hz +/-100 cents
  • Scale Tuning: Preset Scales
  • Music Preset:305
  • One Touch Preset: 180
  • Auto Harmonize: 12 types
  • Arpeggiator: 90 types
  • MIDI:
  • 16 multi-timbre received, GM Level 1 standard
  • Musical Information Function:Tone, Rhythm, Song Bank, numbers and names; staff notation, fingering, pedal operation tempo, measure, and beat number, chord name, etc.
  • Terminals
  • USB Port: Type B
  • Sustain/Assignable Jack: Standard jack (sustain, sostenuto, soft, rhythm start/stop)
  • Phones/Output Jack: Stereo standard jack, Output Impedance: 200?, Output Voltage: 4.5V (RMS) Max.
  • Audio In Jack: Stereo mini jack, Input Impedance: 9K?, Input Sensitivity: 200mV
  • Power Jack
  • 9V DC
  • Power Supply
  • 2-way
  • Batteries: 6 D-size zinc-carbon batteries or alkaline batteries
  • Battery Life:Approximately 5 hours continuous operation on zinc-carbon batteries
  • AC Adaptor: AD-5 (Optional)
  • Auto Power Off: Approximately 6 minutes after last key operation (Operates during battery use only)
  • Speaker Output
  • 12cm x 2
  • Output: 2.5W + 2.5W
  • Power Consumption
  • 9V - 7.7W
  • Dimensions
  • 37-7/16" x 14-13/16" x 5-1/8"
  • Weight:
  • Approximately 10.1lb. (without batteries)
Pro Coverage
One year parts and labor warranty on all keyboards (includes power supply).

  • Customer Reviews

Review Snapshot

by PowerReviews
CasioCTK-4000 61-Key Portable Keyboard

(based on 3 reviews)

Ratings Distribution

  • 5 Stars



  • 4 Stars



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  • 1 Stars



Reviewed by 3 customers

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(60 of 67 customers found this review helpful)


It's great!

By Jared

from Oregon

Comments about Casio CTK-4000 61-Key Portable Keyboard:

It does everything I need it to do, only things missing were the sustain pedal and weighted keys. This has a lot of useful presets, like rhodes style piano, and electric keyboard. It is very useful for someone just starting off. With this I would recommend buying the stand and sustain pedal. It's 1/4" output and input dedicate high quality sounds, so this really works well if you are going on stage or just practicing at home using a PA system at your house, such as an amp. So would I recommend it? Sure, its great for the price you are paying, I hope you find this useful. I've had this piano for about 5 or 6 months...

(36 of 42 customers found this review helpful)



By Angelo Montez

from colorado springs, co

Comments about Casio CTK-4000 61-Key Portable Keyboard:

This keyboard was a great buy for my wife and kids. The kids love it and the wife is learning to play,so great choice for family's.Looks great and sounds great. Still haven't played all of the tones it has.Strong build also because the kids hammer on the keys and it takes it daily. Money well spent.

(29 of 56 customers found this review helpful)


The new high level technology in the world man ?.

By Fernandez Shaw

from Chicago Illinois

Comments about Casio CTK-4000 61-Key Portable Keyboard:

An incredible variety of sounds and usb connectivity ?. I love this band new technology casio ctk-4000 61-keyboard ?. I own one of these casio keyboard, and I love to record into my studio room sound ?. And I like to recording with this 4000 ctk casio in my recording studio ?. And evry time I get up in the morning, I miss with my new casio in the morning to play with it, and singing along with it too also ?. And I like to right song with my new casio ?. And the new 4000 ctk casio helps me get the work done man ?. This 4000 ctk casio is a 100% pro man ?.

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