The catch
Casio PX-770
Check the exact Amazon package to see if a bench comes with it.
Side by side
Casio PX-770 vs Casio PX-870: 770 covers two-track practice, and 870 saves audio to a USB drive
Quick verdict
Buy the PX-870 if you want audio takes saved directly to a USB drive. If two-track practice and headphones cover what you need, the PX-770 does it at a lower complete price.
Before you buy
Why, and what it costs you
Upgrading does not call for a deeper room
Depth is 299 mm on both cabinets, and their widths are only 2 mm apart. So the PX-870's larger speaker system does not need a deeper listed cabinet. Bench space and delivery access fall outside that footprint, and they matter more than the tiny width difference.
Where this comes from
Depth before music rest: PX-770 299 mm, PX-870 299 mm. Listed width: PX-770 1391 mm, PX-870 1393 mm. This is a conditional workflow inference drawn from these documented inputs. There is no matched performance measurement.
The catch
Casio PX-870
The cabinet alone is 34.3 kg, before packaging or delivery access come into it.
Casio PX-770
- Why pick it
- The delivery route has stairs or a tricky doorway
- The catch
- Check the exact Amazon package to see if a bench comes with it.
Casio PX-870
- Why pick it
- You want the upgraded console to fit the same shallow spot
- You want an audio file to share, with no live recording to a computer
- The catch
- The cabinet alone is 34.3 kg, before packaging or delivery access come into it.
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What this page compares
Casio PX-770 vs Casio PX-870, compared on keyboard mechanism, depth before music rest and listed width, along with the practice routines that decide the better choice.
Each is a shallow Casio furniture piano with the same named key action and included pedals. What the upgrade really brings is audio-file recording and the speaker system, and not a different room footprint.
Which one fits
Pick the situations that sound like you
You want the upgraded console to fit the same shallow spot
Depth is 299 mm on both cabinets, and their widths are only 2 mm apart. So the PX-870's larger speaker system does not need a deeper listed cabinet. Bench space and delivery access fall outside that footprint, and they matter more than the tiny width difference.
- Casio PX-770
- Good
- Casio PX-870
- Better fit
You want an audio file to share, with no live recording to a computer
Two MIDI tracks can be recorded internally on both. The PX-870 can additionally save a WAV audio file to USB memory, which is a way to share the actual performance sound without setting up a live computer recording chain. A take recorded internally on the PX-770 is MIDI, a different kind of file.
- Casio PX-770
- Caution
- Casio PX-870
- Better fit
The delivery route has stairs or a tricky doorway
Listed weights are 31.5 kg for the PX-770 and 34.3 kg for the PX-870, which is 2.8 kg apart. They are assembled instrument weights and not shipping weights. If access is difficult, arrange suitable delivery and assembly instead of reading a shallow cabinet as a light carry for one person.
- Casio PX-770
- Better fit
- Casio PX-870
- Good
Headphones are mostly how you practice, and you replay two MIDI tracks
Those tools come with both. If the current complete package costs less, the PX-770 may be enough.
- Casio PX-770
- Good
- Casio PX-870
- Good
In practice
Differences you will notice
Upgrading does not call for a deeper room
Depth is 299 mm on both cabinets, and their widths are only 2 mm apart. So the PX-870's larger speaker system does not need a deeper listed cabinet. Bench space and delivery access fall outside that footprint, and they matter more than the tiny width difference.
How we worked this out
Depth before music rest: PX-770 299 mm, PX-870 299 mm. Listed width: PX-770 1391 mm, PX-870 1393 mm. This is a conditional workflow inference drawn from these documented inputs. There is no matched performance measurement.
Sharing a practice take with someone changes which recorder you need
Two MIDI tracks can be recorded internally on both. The PX-870 can additionally save a WAV audio file to USB memory, which is a way to share the actual performance sound without setting up a live computer recording chain. A take recorded internally on the PX-770 is MIDI, a different kind of file.
How we worked this out
Internal recorder tracks: PX-770 2, PX-870 2. Audio recording to USB memory: PX-770 No, PX-870 Yes. Live USB audio interface: PX-770 No, PX-870 No. This is a conditional workflow inference drawn from these documented inputs. There is no matched performance measurement.
Carrying it upstairs means a heavier load even at the same footprint
Listed weights are 31.5 kg for the PX-770 and 34.3 kg for the PX-870, which is 2.8 kg apart. They are assembled instrument weights and not shipping weights. If access is difficult, arrange suitable delivery and assembly instead of reading a shallow cabinet as a light carry for one person.
How we worked this out
Listed instrument weight: PX-770 31.5 kg, PX-870 34.3 kg. Portable body: PX-770 No, PX-870 No. This is a conditional workflow inference drawn from these documented inputs. There is no matched performance measurement.
Option A
Casio, PX-770
PX-770
A 299 mm-deep cabinet holds the PX-770's two headphone sockets, two-track recorder and three pedals. It works best where the piano can remain assembled between short practice sessions.
- Best for
- The delivery route has stairs or a tricky doorway
Facts we checked
- Keyboard action: Tri-sensor Scaled Hammer II
- Depth ahead of the music rest: 299 mm
- Width as listed: 1391 mm
- Audio recording to USB memory: Absent
Option B
Casio, PX-870
PX-870
On top of a shallow cabinet with three pedals and two headphone connections, the PX-870 records audio to a USB flash drive. It lists the same depth as the PX-770, so stepping up does not mean a deeper piano body.
- Best for
- You want the upgraded console to fit the same shallow spot
Facts we checked
- Keyboard action: Tri-sensor Scaled Hammer II
- Depth ahead of the music rest: 299 mm
- Width as listed: 1393 mm
- Audio recording to USB memory: Supported
Spec by spec
Where they really differ
| Spec | Casio PX-770 | Casio PX-870 | In practice |
|---|---|---|---|
| Keyboard mechanism | Tri-sensor Scaled Hammer II | Tri-sensor Scaled Hammer II | Try out the documented mechanism before taking its name as a guarantee about feel or mechanical noise. |
| Depth before music rest | 299 mm | 299 mm | The music rest, cable route and comfortable playing clearance are all left out of bare depth. |
| Listed width | 1391 mm | 1393 mm | If the gap on your wall is narrow, check the width as well as the space the bench and player take up. |
| Audio recording to USB memory | No | Yes | Live USB audio to a computer is not the same workflow as saving an audio file to a drive. |
| Listed instrument weight | 31.5 kg | 34.3 kg | Work out the load you will be moving from the stated measurement basis, and then add the stand, case and accessories. |
| Maximum polyphony | 128 | 256 | Spec sheets list a maximum voice count, and that is not a measured comparison of musical expression. |
Trade-offs
What each pick costs you
With Casio PX-770
- The USB MIDI connection cannot capture the internal sound as audio directly.
With Casio PX-870
- Recording to a USB flash drive is not the same as streaming live USB audio to a computer.
Change of plan
When the answer changes
The delivery route has stairs or a tricky doorway
Go with Casio PX-770. Listed weights are 31.5 kg for the PX-770 and 34.3 kg for the PX-870, which is 2.8 kg apart. They are assembled instrument weights and not shipping weights. If access is difficult, arrange suitable delivery and assembly instead of reading a shallow cabinet as a light carry for one person.
You want the upgraded console to fit the same shallow spot
Go with Casio PX-870. Depth is 299 mm on both cabinets, and their widths are only 2 mm apart. So the PX-870's larger speaker system does not need a deeper listed cabinet. Bench space and delivery access fall outside that footprint, and they matter more than the tiny width difference.
You need a verified winner on mechanical key noise or on personal playing comfort
Neither model fits. Manufacturer records contain no matched test for those outcomes. Try the instruments under the conditions you intend to play in.
Decision guide
How to decide
Upgrading does not call for a deeper room
Depth is 299 mm on both cabinets, and their widths are only 2 mm apart. So the PX-870's larger speaker system does not need a deeper listed cabinet. Bench space and delivery access fall outside that footprint, and they matter more than the tiny width difference.
Sharing a practice take with someone changes which recorder you need
Two MIDI tracks can be recorded internally on both. The PX-870 can additionally save a WAV audio file to USB memory, which is a way to share the actual performance sound without setting up a live computer recording chain. A take recorded internally on the PX-770 is MIDI, a different kind of file.
Carrying it upstairs means a heavier load even at the same footprint
Listed weights are 31.5 kg for the PX-770 and 34.3 kg for the PX-870, which is 2.8 kg apart. They are assembled instrument weights and not shipping weights. If access is difficult, arrange suitable delivery and assembly instead of reading a shallow cabinet as a light carry for one person.
What this page can’t tell you
- This comparison rests on documented specifications and conditional reasoning about your setup. We have not put key feel, mechanical noise or speaker performance side by side and measured them.
- The dimensions given are for the specified body or cabinet. Allow space as well for the rest, cables, bench and player.
- Before you order, verify the exact Amazon model, color, supplied accessories, condition and delivery date.
By the numbers
What the data shows
What we found across the digital pianos we compare, plus the checked facts behind each finding.
Show the facts and the math
| Product | Needs it meets | Facts we checked | Sources |
|---|---|---|---|
| Casio PX-770 |
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| |
| Casio PX-870 |
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Ready to buy
See today’s price and what owners say
Open either model on Amazon for the current price, customer reviews and delivery options.
Casio PX-770
The delivery route has stairs or a tricky doorway
See price & reviews on AmazonCasio PX-870
You want the upgraded console to fit the same shallow spot
See price & reviews on AmazonEach link opens in a new tab.
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