The CTK-4000 comes pre-loaded with 570 tones. Since the keyboard is GM compatible, the base tones are 127 and the rest of the tones are variations of the 128 tones. While some of the tones are very similar to each other (with only minor variations in chorus/phase), others are dramatically different. The product also comes with 180 styles to play along. Users can sample their own tones and styles and store on the keyboard (memory requires batteries). The tones and styles are very sweet sounding and melodic. They also seemed to be multi-sampled across the keyboard and at different pressure levels. Pressing the keys faster distincly produces a clangy piano sound, not just a louder piano sound. The styles can be manipulated to individually switch off parts. For ex: users can switch off the chords/harmony parts of style and only opt for drums and bass.

The CTK2000 is a basic keyboard with no frills. The CTK3000 is step up from 2000 with more sounds and pitch-bend. The CTK4000 features 48 note polyphony, even more sounds, an arpeggiator, but no pitch-bend. The CTK5000 predictably is a step up from the CTK4000 with a pitch=bend included. A missing adaptor is a gotcha but easily remedied buy purchasing any 9VDC 1Amp adaptor from the market. For some reason, the portamento effect seems to have fallen out of favor and the Casio keyboards no longer feature it. The preset-bank feature is useful to store keyboard setup combination but is marred by the fact that the keyboard does not feature non-volatile memory. I love the arpeggiator feature and music styles feature of the keyboard. The arpeggiator features quite a few combinations - octave up/down/both/random,note lengths etc. The preset styles are neat. Choose a rhythm style. Keep the style button pressed for 2 seconds - the recommended instrument and style tempo are set automatically. The music style feature lets you automatically select the style and tone too. Choose #61 (careless whispers) and the rhythm and tone are set automatically to 16-beat1 and Sax. The keyboard features USB connection but no MIDI in/out/pass-through. Typical Casio; won't give you best of both the worlds. The sampling feature is of not much use since it doesn't come with a sample editor. If you sample a tone or style, there is no way for you to customize the start-stop of the sample or any other manipulation. The keyboard features touch-sensitivity (2 levels) but lacks after-touch (not expected at this price point too). Due to lack of the hammer-action, don't expect to play a sequence of 32nd notes on this keyboard, even 16th notes will be tough. 8th notes though can be accomplished easily by first-timers. Loads of interesting functions like transpose, arpeggiator-hold, reverb/chorus levels are hidden away behind a small button titled functions. A sustain controller can be attached but not a breath controller.

The keyboard is quite easy to use. Buttons are neatly labeled. Accessing basic functions is a no-brainer. Advanced functions require reading the manual and a few experiments on the keyboard. The 2-second press for presets functions makes it very easy to quickly setup the keyboard for optimal playback. Since this keyboard is squarely targeted for the family home rather than the stage, this feature is much appreciated. Most functions are selected through a number pad. A jog-wheel to select parameters would have been nice.

Very plasticky and featuring a passe silver finish, I was tempted to buy the CTK300 or the CTK5000 (black). But what made me buy the CTK4000 was the fact that feature-wise, this is a superior product when compared to the CTK3000 and the CTK5000 was priced beyond the budget restriction I had set for myself. The keyboard is surprisingly light though and will definitely save my back as I go carting around town to friend's or trainer's place. The keyboard keys are nice and long but not springy enough for virtuoso pianist. Then again, no virtuoso will be caught dead using a Casio learner's keyboard. So the point is moot.

Compared to Yamaha (the other manufacturer of home keyboards), this keyboard is definitely a better deal because of the higher number of tones, polyphony, and customization features. The nearest Yamaha still has fewer features than this and costs 40% more.

The keyboard came with 3 years warranty, so be sure to get it stamped by the dealer and preserve the bills of purchase. Roll them and put them in the battery compartment if you are the type that loses papers. I used to own a Casio PT-20, a SA-20, a MA-120 and never had to revert to the manufacturer. So here's keeping my fingers crossed that Casio quality control is still the same as it used to be. The manual mentions downloadable software on Casio's site. The s/w can be used to save the keyboard settings, user tones and styles and quickly load them back on the keyboard. I however could not find any reference to software on Casio's site.

Sex appeal - Zero. But should you get it? YES. The keyboard is power-packed for entertainment and in the end that's what matters.

Hobbyist

Still learning the ropes, hope play pop.

A myriad of sounds and rhythms. Great variety. Love the touch sensitive keys.

I Purchased a CTK 4000 because of the ability to store registrations. However, I wasn't aware that in order to keep the registrations, one needs to keep the keyboard plugged in or you need to have 6 D cell batteries stored in the keyboard. Casio should address this and have a small cmos battery to hold registrations. The other thing I find odd is that the Accompaniment is set at around 120 at default, louder than the melody. Easily adjusted but odd.

I have a WK 3000 at home and the 3000 is better but once you learn the functions, no problems.

Keys are a little plasticky and can be noisy when played but otherwise it's fine.

Definitely. Very little money for all of it's features. I purchased it for use in a camper. Size is small, perfect for what I am using it for.

Contacted them about the registrations and had an answer very quickly through email.

Hobbyist

eclectic

for the price, this is an excellent keyboard for beginner or expert, I purchased this for use on camping trips and family get together s, When hooked up to a small amplifier this keyboard really sounds very good.

The product did not come with a power supply? that had to be purchased separately, I like the idea that it only weighs 10.14 Lbs, very easy to transport, the speaker system is OK for the price.

After spending about an hour or so, to get the feel of the board, I was able to get some pretty nice sounds, the programmed Music presets were very nice to work with, I have been a working Musician Since 1961, this is a nice little board for the price.

I gig with a $4000.00 Keyboard, This is a nice little Top, that will more than likely go to one of my Grand Children.

It's a bit overpriced, but that is just my thoughts.

I have never dealt with this company, But I have had other products from this company and they always held up good.

it's a nice looking keyboard, I wouldn't go as far as saying it has Sex Appeal.

Active Musician since 1961

Easy Listing - Dinner Club

Stunning church organ! The casio chord based accompaniments are also very improved. Many new sounds from the orient, with oriental and mid-oriental sections.

Came with 2 music books, full documentation on paper, and power supply. Now at 100$can that is a lot of good stuff. Il still operate a Casio hand calculator bought 72$ in 1974. The best keyboard I have ever found on a calculating machine. How is that for quality? Superb.