Casio PX-870 Review 

 March 3, 2021

By  Zen Chung

After replacing the PX-860, the Casio PX-870 has become the flagship piano in the Privia PX collection of Casio. We look forward to reviewing this piano with you and helping you see this tool as it is, i.e. its nice and bad sides.

If you still share the feeling that Casio is making toy keyboards, then you’re likely not up-to-date with the brand Casio. Some quite exciting and compelling designs have been published by the brand and the PX-870 is just one of many.

Not all keyboards are for all pianists, however, and with distinct clients and client groups in mind, companies create their keyboards. Are you going to find the Casio PX-870 a compliant keyboard? All you need to do is continue reading to figure out.

But if you’re too hurried to go through our thorough evaluation, the bottom line is here.

First query, for whom is the PX-870 Casio? 

For any musician with any minimum piano skill level, i.e. from beginner to pro player, the Casio PX-870 should work. But just go for this if you’re searching for a piano-strict tool.

Why are we saying that?

We say this because this model does not come with lots of sounds, models of accompaniment and rhythms as you would discover in other keyboards. So, in terms of making music, it may not be the thing you’re searching for.

This is great for practicing the piano, though. And Casio made many changes to the PX-870’s instant previous model.

This is the nearest you can get to an electric piano at this cost stage from Casio from a 4-layer piano sound, brand fresh instruments, 256-note max polyphony, as well as ivory/ebony key tops.

Alright, for those who have the time, here is the complete analysis below…

Features of the Casio PX-870

Design – Stylish but not portable

Even though the Casio PX-870 is not precisely mobile in the Privia series of Casio. It’s actually a piano in the style of furniture. It emerges as a full-fledged keyboard with 88 keys. It also comes with 3 pedals for piano.

The Casio PX-870 operates readily as a house piano with its design. And while its furniture-style, it’s still pretty compact that it doesn’t need as much room as a real acoustic. It also appears really stylish, so it will definitely contribute to your living room.

But in fact, the keyboard is quite heavy again. So, it’s not something that you willy-nilly want to transport around. It truly weighs up to 75 pounds and as you can see, that’s pretty heavy.

Okay, now to another point about this keyboard’s design…

You’re going to get your keyboard in a large box. And this big box will contain all the pieces of the instrument you are intended to put together.

Fortunately, this makes assembly very simple. A screwdriver is the only instrument you need to bring the components together. And it shouldn’t take the whole shebang at most more than 45 minutes.

Now while you can completely take yourself from assembling the full keyboard, with some assistance you are likely to be better off doing this. The box weighs approximately 100 pounds. It’s not joking this thing, boys. So, get some assistance if you can.

In addition, as portion of this keyboard’s design, you will also discover 3 piano pedals including the support, sostenuto and gentle pedals. The sustain pedal, of course, also promotes the half-pedal feature. And that’s just another manner that the PX-870 looks like an acoustic piano.

And finally, it comes with a good fiberboard cabinet that provides an elegant texture of wood.

Interface – Simple but no display

The Casio PX-870 interface is pretty simple and easy to access. There are about 8 switches that can be used to access keyboard features such as the piano and the electric piano. But not only the sounds, but also the switches assist you access other features such as metronome and recording features. And then, of course, there is a master volume knob.

And each key goes with its own tags to render the interface even easier for you to navigate. However, we’ve still noticed a small issue with the interface, and that’s the fact that it doesn’t come with any kind of screen.

For us, of course, it’s a bit of a downer. But this starts with beep sounds that inform you which choice you have chosen and are on at the moment. You can hear 1, 2, 3, or 4 beeps, depending on the alternative you pick.

Sound – With All-New 4-Layer Piano Tone

The Casio PX-870 comes with an amazing sound and an enhancement compared to earlier Privia series. And what’s the upgrade? Well, it comes with a piano sound of four layers. And it sounds really great.

The sound of the tone is wealthy and soft with a natural decline. This makes it quite exciting and enjoyable to practice this instrument.

This emerges with the world-famous noise engine of Casio, of course – the multi-dimensional Morphing AiR Sound Source. The samples on this piano that provide the lovely sound are acquired from a 9-foot grand piano.

Moreover, with lossless audio compression, this piano comes with a bigger memory capacity. With sharper precision, this enables the piano to sound even better. And by sharper precision, we mean you’re going to get decay, resonance, and strings of a fairly natural note.

Built-in tones and sound effects – Relatively authentic and impressive

As we mentioned in the section Bottom Line, the Casio PX-870 doesn’t come with many sounds. So, you’ll only discover 19 built-in colors in full on the PX-870. And every one of them sounds very genuine.

Now, while using the same AiR noise source that other Casio pianos also perform, this is even more outstanding. How so? Well, it has some characteristics that are not offered by other pianos in the PX sequence such as the PX-160 and PX-770.

String Resonance System is one of those characteristics. For each of the 88 keys on the CasioPX-870, this is a scheme that simulates a resonance effect.

So what’s all about this String Resonance scheme? Well, when you perform a standard acoustic piano, it’s not just from the buttons that you perform alone that the noise you get. Other characteristics that also influence the sound are the strings. They offer the sound more completeness and richness when they resonate.

So on the Casio PX-870, that’s what the String Resonance scheme is doing for you. And even more, you can change the impact of the ties as you like. The suppressed and somewhat suppressed are there. And then there is the reverberation as well as the powerful reverberation.

The Lid Simulator is another distinctive characteristic of this piano. The Lid Simulator simulates the sound effects that you normally experience when you close or open the lid of an acoustic piano. This feature also comes in 4 settings that are closed to the lid, open the lid completely, open the lid slightly, and remove the lid.

Other exciting features on the Casio PX-870 include the Hammer Response key-off simulator, plus a Hall Simulator effect.


We have already stated that it comes with 88 piano keys of full size. And these buttons are backed by the Scaled Hammer Action Keyboard II tri-sensor from Casio.

So, yes, this means that Casio uses real keyboard hammers to produce a touch, response, and feel near to what you encounter on an acoustic piano. Actually, the weight of the keys also feels fairly well weighted.

As for the triple sensor, it’s what makes the response of the keys excellent and responsive.

In addition, the PX-870’s keyboard is graded. And this means that when you play, your keyboard will feel much heavier at the bass ends than it feels at the treble end.

Now finally, about the keys, they are also quite touch-sensitive.

Finally, they’re also quite touch-sensitive about the buttons now. And there are 3 settings you can pick from – hard, soft and medium.

In fact, the difficult setting will offer you the most flexible answer. So basically, when you play the buttons tough and when you play them smooth, there will be a world of distinction. This is quite different from the gentle setting, which does not offer the sound reaction much distinction.

The medium, however, is the soft-hard option. And of the three settings, it’s likely also the most natural.

But you can also turn it off completely if you don’t want the whole thing about touch sensitivity entirely.

Pros of Casio PX-870

  • Compact and elegant design.
  • Comes with 3 piano pedals plus half-pedal function support.
  • Great keyboard with fantastic hammer action and ivory/ebony key tops.
  • 19 authentic sounding built-in tones.
  • Improved piano sound.
  • Max polyphony of 256 notes.
  • 40Watt Speaker system.
  • Concert Play feature.
  • Comes with Audio and MIDI recorder.

Cons of Casio PX-870

  • Not quite the portable instrument.
  • Built-in tones and sound effects are not so many.
  • Key action of this piano is a little noisier than other models.


For those searching for a digital piano, this is a wonderful keyboard that provides them a close enough acoustic experience. You can hardly get better at this price point and at Casio.

It is a much more sophisticated keyboard than the PX-860 with many characteristics that will surely be enjoyed by both beginners and advanced users.

But if you’re searching for an instrument that will inspire you to produce music, it’s not this one. There are not many built-in sounds and there are not many models of rhythm, rhythms or even a big recorder.

So, if you care so much about those bells and whistles, you might need to check out other keyboards such as the Yamaha DGX-660.

But the Casio PX-870 is a very remarkable tool in its entirety.

Zen Chung

I'm Zen Chung, a piano and violin teacher based out of Plano, Texas. I started this blog because my students (and their parents) kept asking about the best musical instruments to buy online. Look no further I'm here to save the day! 

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