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Casio privia 870 review: Six months of own use.


The Casio PX-870 is a compact digital piano made in wood (fiberboard) with wood texture all over the cabinet.

If you’re tired of seeing the keys all time when you’re not playing the piano. Then feel free to pull down the lid over the keys and enjoy the PX-870 as a furniture.

You’ll probably fit the piano in tight spaces, only 11.7 inches deep. Tho it’s very heavy, approximately 75.5 lbs when it’s screwed together.

Even more heavy when it’s in the box on the way to you, It's not a bad idea to have a friend with you if you're going to pick up the piano.

Choose between three colors of the PX-870, black, white & brown oak depending where you buy it. I myself bought the black version. And I don't regret it. Like mentioned earlier, the PX-870 will be a part of your decor, if choosing a black one it’ll probably fit in your house.

On the left side of the piano you will find all the buttons that will navigate you around the piano. There are 8 buttons and one volume controller.

At the top you find an on & off button, just beneath that you can control the sound volume.

Under that we found the function button, which is the button you need to press down to change sound, rhythm and songs.

We could probably explain the function button as the ‘’main’’ button.

However, under function we find the metronome and further down audio rec and midi rec. We’ll go through the recording further down.

Then the pause and play button. It’ll play or pause the built in songs. Or the performance you have recorded to the internal memory.

The last two buttons are a fast navigation to the grand piano sound and the electric piano sound.

The Casio PX-870 will include a sheet music holder with the name Casio at the top. It is very easy to remove as it only has two plugs in the piano, therefore you can drag it away at any time.

They’ll also equip you with the three necessary pedals. The pedal holder is very easy to connect to the piano. There is one cable you connect to the PX-870 and some screws to screw together with the piano.

Worth mentioning is that the piano as a whole isn't that hard to screw together. Just do what the manual tells you and you’ll be done in approximately 30-40 minutes.


The PX-870 features the well known Tri-sensor Scaled Hammer Action Keyboard II with 88 full-size keys.

The keys are in synthetic ebony & ivory with texture on the black keys.

They’re very well made. Compact and robust, so no needs to slint away from the keys. At Least i’ve never experienced that.

Sounds very promising, doesn't it.

The purpose with a good key action is always to replicate an acoustic pianos key action somehow. I can tell you that this key action is very well replicated to the acoustic pianos I’ve played on.

However, to get the most appropriate key action, they use real hammers to recreate the touch and the feeling of playing a real acoustic piano.

The PX-870 features a smooth and responsive playing experience. That's thanks to a triple-sensor key detection system they use.

The keyboard will also feel heavier in the lower end and vice versa in the higher end. It’s called Graded hammer action. That means that all the keys are weighted, but in different ways.

You can also change the touch sensitivity so it’ll suit your playing style in three ways. Soft, medium and hard. But you can also turn the sensitivity completely off if that’s wanted.

Something I noticed with the key sensitivity is that Casio is serious about making a good sensitivity. The harder you play the more it will sound, also the opposite. I am very satisfied with the key action overall. I don’t doubt you will be either.


The PX-870 features Casios AiR sound source, it provides a rich powerful sound sampled from a 9 foot grand piano.

They have made an extraordinary job to simulate the sound of a grand piano. Which exposes the harmonic relationships between vibrating strings. To then remake it into a digital piano.

But more fascinating could be the 4-layer piano tone. That’s what really provides the rich and natural sound.

The PX-870 includes 19 sounds. I’ll list them further down. However, 19 sounds might be little for paying approx 10 grand. For me it’s been more than enough, in most cases when you buy a more expensive digital piano, you’ll get other features than hundreds of sounds.

If that’s what you’re looking for, i’ll recommend reading this one review.

All the sounds are very well sampled and made very professional. Especially the piano sound, you can actually choose between five different piano sounds.

- Five grand piano sounds.

- Four electric pianos.

- Four organs

- 2 strings

- Vibraphone

- Harpsichord

- bass.

PX-870 features a broad music library. In total 60 built in songs you can play along with, practicing with or just listen to the songs. I can admit that the songs are actually pretty good. Though it depends on the music taste.


In the PX-870 you’ll get more than enough of polyphony. You’ll get 256 polyphony which is one of the highest a digital piano can have.

In most cases, 128 and 192 will be enough. But it would be strange if we complain about a high polyphony rate.

If you buy a piano with 256 polyphony, you’ll never have the issue to upgrade to a higher polyphony rate. Have that in mind when choosing a piano.

Anyways, the Polyphony is the maximum amount of notes that a keyboard or sound module can produce at one time.


The PX-870 comes with 4 powerful speakers. Doesn't look that big but it surely produces the best imaginable sound.

Two of the speakers are at the top of the piano, just over the keys. The other two are under the keyboard, also a bit less.

The quality of the sound throughout the speaker system is very hard to explain in words. It's just so good.

However, this piano has a dynamic range starting with very soft pianissimo to finnish in loud fortissimo. Digital pianos with a less sound system won’t provide such a sound.

There will be no needs to connect external speakers to enjoy the sound at most. These speakers are enough for performing to friends and family. And ofcourse for yourself.

Something I discovered was that you don’t need high volumes on the PX-870 to be satisfied. Many times I can play with a quarter of the full volume and still feel contented. I call it a receipt for a good piano.


Unfortunately the PX-870 doesn't feature split mode, meaning that you don't have the ability to divide the keyboard into two sections and play two different sounds in each half.

Tho it can only be used with the bass sound. When you press the bass button it will automatically be divided into the left half of the keyboard. Therefore you can play other sounds on the right half, but that’s it.

On the other hand, the PX-870 allows you to layer two sounds so you can play them simultaneously. It’s called dual mode and you can layer any of the sounds mentioned above in the sound list, except the bass. It can’t be used in this mode.

Lastly we’ve got duet play, the duet function splits the keyboard into two equal halves, with the same octave range.

This function is very useful if you have a piano teacher. It allows your teacher to play on the left side and you on the right side.


The Casio PX-870 comes in two shapes of recording your performance. Either you go with Midi rec or Audio rec. Both can be used in separate ways, I'll try to explain how.

Let’s say you’re using the MIDI recorder, what it does is that it actually isn’t recording the sound, but it actually records the sequences of the notes and the velocity.

It records your performance into the internal memory of the PX-870, if you want to record another one right after, your previous recording will be struck over.

So the midi recorder is only used to recap what you recorded and can’t be transferred to a computer.

But on the other half, the audio recorder is somewhat the opposite but still not.

With the audio recorder it still records your performance, now it records the actual sound and not the sequences. Luckily it can easily be transferred to a computer through an USB flash, which you can connect right into the piano.

So you just press the audio recorder with a USB flash connected into the PX 870, and therefore your performance is saved and won't disappear when you make a new recording.


The PX-870 is equipped with a headphone/stereo output jack. Two ¼ jacks you can connect your headphones to, no needs to disturb anyone with the PX-870.

These jacks can also be used to connect amplifiers and external speakers.

Not directly that you will need external speakers, but it’s still there.

Then we’ve got the USB to host which can be used to transfer MIDI data to a computer. This could actually be seen as a third way to record your performance. As long as you’ve got a midi cable that can be connected with USB in the other end into the computer.

The USB to host is a USB type B, worth mentioning.

Lastly the USB flash drive, it’s the USB type A and is used to plug a flash drive in directly to the piano and exchange files in that way.

Like when you record with the audio recorder and want it to your computer in a wave form, you’ll use the USB flash drive port.


What’s good with the PX-870 is that when you purchase it you’ll get all necessary accessories included. Sheet stand, all three pedals and a beautiful cabinet that you won’t need to buy separately for 200 dollars extra.

Buying the PX-870 might seem like putting out a lot of money, but regarding what it includes, you’ll save time looking for accessories.

Tho you still need to find a bench, that’s what the PX-870 wont supply you with.



- Comes with an incredible sound quality.

- 256 polyphony.

- Record either in MIDI or AUDIO.

- AiR sound source.

- Will suit pros and beginners.

- Well made Hammer action with synthetic Ivory & Ebony keys.


- Very heavy, not portable.

- Definitely not spoiled by many sounds.


After six months of use, I personally am very satisfied with my PX-870. This piano is one of the best pianos in this price range.

For some it might seem much and others find it affordable.

However, depending on your requirements the PX-870 will satisfy you, or not.

If your intent is to play with 100 different sounds, then the PX-870 won’t live up to your requirements.

But if you want to invest in a digital piano with a high quality sound. If that’s the case, then the PX-870 will surely live up to your requirements.


If you want more pianos to choose between in the same price range and the same amount of keys, I would recommend you reading our TOP 10 CASIO PIANOS.

Everything from 61 to 88 keys pianos so it suits everybody.

Or do you maybe consider starting out with a 61 key piano? Or maybe buy a starting piano for your children, then take a look at our Best 61 key keyboard top list review.

Do you want to teach yourself piano? Then I would highly recommend you taking a look at our flowkey review. We took an in-depth look in the popular piano learning app/program and covered the most important aspects for you. Check it out!

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