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Casio PX870 Review – It Will Amaze You

Casio PX-870 Review

Welcome to our review of the new flagship of the Privia Model, the Casio PX-870. This model is an improvement of the previous model PX860 which comes with exciting features like the four-layer piano sounds, a well-designed sound system and many others that we’ll discuss later.

The piano is quite affordable and will perfectly fit your needs if you are looking for a piano to perform or practice with.

Before we continue this review, we encourage you to compare the Casio Privia PX870 with other great digital pianos:

Yamaha p-125Yamaha P-125

Casio px850 ReviewCasio
Casio px860Casio
Casio PX760 PriviaCasio PX760 Privia88128-$$-
Casio PX160Casio Privia PX-160

Yamaha DGX-660Yamaha DGX-66088192-$$-

Casio PX870 Review of Key Features

So, what makes it special?

Before we start, here is a summary of its key features and specification:

  • 88 weighted keyboard with ebony and ivory texture.
  • 3-levels touch sensitivity
  • 4-levels hammer response
  • Split, Dual and Duo modes
  • USB recorder
  • Connectivity: 2 Headphone jacks, USB-device, USB-Host, pedal connector
  • Lesson functionality
  • 256 polyphony, 19 instrument sounds, 17 temperament, 60 preset songs
  • Acoustic simulator.


The PX-870 comes with furniture-style cabinet design and 3-foot pedals. The cabinet is made of pressed wood (fiberboard) giving it a nice texture that you will love to feel. Its design is stylish where it blends seamlessly with any environment.

The PX-870 has 54.8” x 11.7” x 31.5” dimensions making it compact enough to fit in a tight space. Even with that, the piano is around 75.lbs when fully assembled making it easy to move compared to the acoustic piano.

When purchased, the Piano comes in one large box that has all the pieces in it. It is easy to assemble where it will take you less than 45 min with the help of an instruction guide that is easy to read and understand.

You can assemble it alone where you only need a screwdriver, but it will be easier if you have someone else to assist you considering it is over 75 lbs. in the box.

The cabinet design is smaller in size and has fewer seams compared to the previous model the PX-860 and comes in two colors white and black wood finish which you can choose from.

 Casio Privia PX-870 Digital Piano - White

Casio Privia PX-870 Digital Piano - BlackIt comes with a slim speaker grill instead of the opening lid that gives quality sound projections. It has 3- foot pedals; sostenuto, soft, and sustain. You can also go with half pedal action in the sustain pedal where it responds like a damper pedal on an acoustic piano.

The design also has the pullout keyboard cover that keeps its keys from dirt and dust when not in use.

Another great mechanism in this digital piano is that it has control elements repositioned to the left, giving it a less cluttered and cleaner look compared to its predecessor the PX-860. Here, you can find the master volume, eight sound buttons, and functions like audio recording/MIDI, and the metronome on. You can also access other settings, functions, and sounds by the function button and the piano keys.

Unfortunately, you cannot see your settings because the OPX-870 come with no LCD, but that is not a major issue as it produces a beep sound when you select specific settings. This makes it easy to understand the settings you have chosen.

Casio PX870 Sound

The Casio PX-870 comes with a multi-dimensional AIR sound engine, which gives the quality sound of a grand piano. With the lossless audio compression and the improved memory capacity, you are assured to get the most authentic sound that you can't find in any of the digital pianos in the price range.

Even more, the PX-870 has a four-layer tone that sounds quite amazing. The tone produced is very smooth and with a rich natural decay making it even more awesome to play.

Even though the PX-870 does not come with lots of sounds, but the 19 tones are very authentic. It offers some exceptional features that even others model in the Privia series doesn’t.

It comes with strings resonance system that fits each key in the piano. This means that as you play the instrument, the sound produced is related with both the keys and other associated strings. This makes the sound fuller and richer.  Even better, you can adjust the resonance to sound the way you prefer.

Another distinctive feature is the lid stimulator that stimulates the sound associated with the opening and closing of the grand piano lid.

With the key-off stimulator, you can modify the tone depending on how fast or slow your fingers leaves the keys.

There is hall stimulator feature creates various acoustic performance experience, like standard Hall, Dutch Church, Berlin Hall and so on.

There also the key on/off actions that give you an aspect of the acoustic piano. The hammer action will allow the time deviation among the note played and the actual sound. You can additionally modify the sound using numerous sound effects like chorus and reverberation.


The digitalCasio PX860 Review - panel and controls piano comes with the Tri-Sensor Scaled Hammer Action Keyboard II that has 88 keys.

This keyboard features the actual hammers that create the touch of a real piano. Its keys have a triple sensor detection system that lets you play faster notes giving you a smooth playing experience.

Casio px-870 comes with a graded keyboard, meaning that they are lighter from high-end and heavier from the low-end like a real piano. Its keys are touch sensitive where when you hit hard or soft; the volume changes.

Casio PX-870 Review - Graded Hammer Action

You can adjust the sensitivity level to fit your playing preference using the three preset settings. The settings include the soft, hard and medium. When you chose “soft” the sound doesn’t change regardless of how soft or hard you strike the keys. The “hard” settings, provides a broad range of dynamics where you can get the soft pianissimo to thunderous fortissimo. The “medium” settings gives you a natural feel and it comes as a default setting in the digital piano.

Also, you can turn its touch sensitivity off where the volume remains the same irrespective of how soft or hard you hit the keys.


The 256-note polyphony (what is polyphony?) is yet another thing the Casio PX870 has over its competitors. No digital can offer that in the price range.

The polyphony is adequate to play more complex pieces and layer various sounds and still not run out of notes out of notes. Even with the 128 and 192 will be enough for this so you can imagine how far you can go with 256 polyphony in the PX-870.

With the digital piano, you are assured to play for years without the need to upgrade.


Casio PX-870 SpeakersThe PX-870 40W sound system comprises of four speakers that allow the sound projection to originate from different sides in the instrument.

The speaker system produces a sound loud enough almost like the grand piano.

The piano offers a dynamic range of sounds from loudest fortissimo to softest pianissimo than other pianos with less sound projection system cannot offer.

They are very powerful such that they can fill a large room performance, so you don’t have to worry about external speaker system if you need to throw a little performance to a small audience.

Casio PX870 Review - Other Features

Concert play

The concert play is another fantastic feature of the Casio PX-870. It enables you to play alongside a realistic recording of an orchestra. You can also practice a concert play before you use this feature to understand it fully.

Each part is played separately where you play left hand part and listen to the playback.

Music library

The PX-870 comes with the 60 songs music library.  With the songs, you are able to listen, play along or even practice with each hand independently. You can also add ten MIDI songs files that can be easily downloaded from the internet, upload them into the internal memory.

Record and playback

The recording functionality on the piano enables you to record and playback of your playing.

You record the performance through MIDI recording or in the pianos internal memory. One drawback for using the internal memory to record is that it allows only one song to be recorded. So, if you are to record more than one song, you should use a flash drive and save it as a MIDI format that you can load later when you require them.

You can also save the recording in WAV file which you can save without the need for any special tool.  With the format, you can play your recordings on smart devices and share them with friends and family.


Dual mode

The Casio PX-870 enables the layering of two sounds simultaneous. For instance, you can merge the piano sound with harp, strings or other sounds preferred. You can also adjust the sound volume to attain numerous effects.

The Split Mode

The “split mode” is offered by some digital piano where you separate the keyboard into 2 different section and play different sounds on them.

This is not precisely the case in the PX-870, but you can select the lower tone and automatically assign the lower side another sound. This will work like the split mode but you only assign the keyboard high side.

Duet Mode

This one feature that you will find valuable in the piano. You can separate your keyboard into 2 sections that have the similar octave range as if there are two pianos in use.

A tutor can play the same tunes on one part of the keyboard as the student follows along.

casio px870 black

Other functions

There are two great features in this model that are not in other Privia model pianos, they include the volume synch EQ and headphone mode.

The headphone mode creates the large sound fiend of the acoustic by optimizing the piano tone and the Volume EQ helps in balancing the sound in low volumes to make them more natural and clear.


Casio PX-870 comes with a metronome that features the adjustable tempo, volume and time signature. This tool allows you to practice at a stable tempo and help you in keeping time.


The PX-870 comes with 16 temperaments that you can easily choose from. You can find both equal and historical temperament in the instrument that will make it easy to play Arabic pieces, Indian pieces, and classical pieces among others.

Octave shift, tuning, transpose

To change its pitch, you will find these three functions very helpful. The transpose will help you in raising and lowering the pitch.

The turning function will allow you to regulate the pitch. This will be very helpful especially when you want to match another player’s pitch. You can also use the octave shift to shift pitch in the octave unit.


The good thing about Casio PX-870 is that you are not required to buy many accessories in addition to the instrument purchase.
In fact, you just need to buy a bench and headphones, and then you are good to go.


The Headphones come in handy if you are practicing in a noise-sensitive environment. You can purchase a high-quality headphone with just a few bucks that will give you clear and comprehensive sound that even the onboard speakers are unable to offer.

9 Total Score
It will amaze you!

The piano is an advanced digital piano in Privia piano series where it utilizes the best grand piano samples. It has been equipped with 256 polyphony that you will only find with $2000 pianos.Beginners will significantly benefit from Lesson mode as they are able to play along with 60 built-in songs and use the duo mode to practice with a teacher. Also, skilled players will appreciate features like the 256 polyphony, Tri-Sensor Scaled Hammer Action Keyboard II and so on.This model has earned a 4.9 star due to its technical enhancement, broad spectrum and authentic sound. If your primary focus is a piano, then you must consider the PX-870. Everything in it you will enjoy, and despite your experience level, there will be something that will amaze you.

  • Stylish design
  • Concert play feature
  • 3-foot pedal
  • 256 polyphony
  • Weighted hammer key action
  • Improved piano tone
  • Not portable
  • Few built-in sound and effects
  • The key action is a bit noisier