Main trade-off
Casio PX-770
Check the bench separately in the exact Amazon package.
Head-to-head
Casio PX-770 vs Casio PX-870: 870 saves audio to a USB drive, 770 covers two-track practice
The short answer
Choose the PX-870 if you want to save audio takes directly to a USB drive. Choose the PX-770 when two-track practice and headphones cover your needs at a lower complete price.
Before you choose
The reasoning and the trade-offs
A deeper room is not needed for the upgrade
Both cabinets are 299 mm deep, while their widths differ by only 2 mm. The PX-870's larger speaker system therefore does not require a deeper listed cabinet. Bench space and delivery access still sit outside that rectangle, which matters more than the tiny width difference.
What this is based on
PX-770: Depth before music rest 299 mm. PX-870: Depth before music rest 299 mm. PX-770: Listed width 1391 mm. PX-870: Listed width 1393 mm. Conditional workflow inference from these documented inputs. No matched performance measurement.
Main trade-off
Casio PX-870
The cabinet weighs 34.3 kg before considering packaging or delivery access.
Casio PX-770
- Choose it for
- Delivery includes stairs or a difficult doorway
- Main trade-off
- Check the bench separately in the exact Amazon package.
Casio PX-870
- Choose it for
- You want the upgraded console in the same shallow spot
- You want a shareable audio file without live computer recording
- Main trade-off
- The cabinet weighs 34.3 kg before considering packaging or delivery access.
About this comparison
Casio PX-770 vs Casio PX-870: compare keyboard mechanism, depth before music rest, listed width and the practice routines that change the better choice.
Both are shallow Casio furniture pianos with the same named key action and included pedals. The practical upgrade is audio-file recording and the speaker system, rather than a different room footprint.
Winner by situation
Start with what you need it to do
You want the upgraded console in the same shallow spot
Both cabinets are 299 mm deep, while their widths differ by only 2 mm. The PX-870's larger speaker system therefore does not require a deeper listed cabinet. Bench space and delivery access still sit outside that rectangle, which matters more than the tiny width difference.
- Casio PX-770
- Good
- Casio PX-870
- Better fit
You want a shareable audio file without live computer recording
Both can record two MIDI tracks internally. The PX-870 can also save a WAV audio file to USB memory. That gives a route to sharing the actual performance sound without setting up a live computer recording chain. PX-770's internal MIDI take is a different kind of file.
- Casio PX-770
- Caution
- Casio PX-870
- Better fit
Delivery includes stairs or a difficult doorway
PX-770 is listed at 31.5 kg and PX-870 at 34.3 kg, a 2.8 kg difference. These are assembled instrument weights, not shipping weights. If access is difficult, arrange suitable delivery and assembly rather than interpreting a shallow cabinet as a light one-person carry.
- Casio PX-770
- Better fit
- Casio PX-870
- Good
You practice mostly through headphones and replay two MIDI tracks
Both supply those tools. The PX-770 may be enough if the current complete package costs less.
- Casio PX-770
- Good
- Casio PX-870
- Good
What matters in practice
The differences that matter
A deeper room is not needed for the upgrade
Both cabinets are 299 mm deep, while their widths differ by only 2 mm. The PX-870's larger speaker system therefore does not require a deeper listed cabinet. Bench space and delivery access still sit outside that rectangle, which matters more than the tiny width difference.
How we reached this conclusion
PX-770: Depth before music rest 299 mm. PX-870: Depth before music rest 299 mm. PX-770: Listed width 1391 mm. PX-870: Listed width 1393 mm. Conditional workflow inference from these documented inputs. No matched performance measurement.
Sending a practice take to someone changes the recorder you need
Both can record two MIDI tracks internally. The PX-870 can also save a WAV audio file to USB memory. That gives a route to sharing the actual performance sound without setting up a live computer recording chain. PX-770's internal MIDI take is a different kind of file.
How we reached this conclusion
PX-770: Internal recorder tracks 2. PX-870: Internal recorder tracks 2. PX-770: Audio recording to USB memory No. PX-870: Audio recording to USB memory Yes. PX-770: Live USB audio interface No. PX-870: Live USB audio interface No. Conditional workflow inference from these documented inputs. No matched performance measurement.
An upstairs move has an extra load even with the same footprint
PX-770 is listed at 31.5 kg and PX-870 at 34.3 kg, a 2.8 kg difference. These are assembled instrument weights, not shipping weights. If access is difficult, arrange suitable delivery and assembly rather than interpreting a shallow cabinet as a light one-person carry.
How we reached this conclusion
PX-770: Listed instrument weight 31.5 kg. PX-870: Listed instrument weight 34.3 kg. PX-770: Portable body No. PX-870: Portable body No. Conditional workflow inference from these documented inputs. No matched performance measurement.
Choice A
Casio, PX-770
PX-770
The PX-770 packages two headphone sockets, a two-track recorder and three pedals in a 299 mm-deep cabinet. It is useful when the piano can stay assembled between short practice sessions.
- Best matched use
- Delivery includes stairs or a difficult doorway
Checked facts
- Keyboard mechanism: Tri-sensor Scaled Hammer II
- Depth before music rest: 299 mm
- Listed width: 1391 mm
- Audio recording to USB memory: No
Choice B
Casio, PX-870
PX-870
The PX-870 adds USB flash-drive audio recording to a shallow cabinet with three pedals and two headphone connections. Its listed depth matches the PX-770, so the upgrade does not require a deeper piano body.
- Best matched use
- You want the upgraded console in the same shallow spot
Checked facts
- Keyboard mechanism: Tri-sensor Scaled Hammer II
- Depth before music rest: 299 mm
- Listed width: 1393 mm
- Audio recording to USB memory: Yes
Meaningful differences
What changes the fit
| What changes | Casio PX-770 | Casio PX-870 | Why it matters |
|---|---|---|---|
| Keyboard mechanism | Tri-sensor Scaled Hammer II | Tri-sensor Scaled Hammer II | Try the documented mechanism before treating its name as a guarantee about feel or mechanical noise. |
| Depth before music rest | 299 mm | 299 mm | Bare depth excludes the music rest, cable route and comfortable playing clearance. |
| Listed width | 1391 mm | 1393 mm | A narrow wall gap needs a width check in addition to the space used by the bench and player. |
| Audio recording to USB memory | No | Yes | Saving an audio file to a drive is a different workflow from live USB audio to a computer. |
| Listed instrument weight | 31.5 kg | 34.3 kg | Plan the moving load using the stated measurement basis, then add the stand, case and accessories. |
| Maximum polyphony | 128 | 256 | A maximum voice count is a specification, not a measured comparison of musical expression. |
What you give up
Every choice has a cost
If you choose Casio PX-770
- Its USB MIDI connection does not directly record the internal sound as audio.
If you choose Casio PX-870
- USB flash-drive recording is a different route from sending live USB audio to a computer.
Recommendation switch
The decision flips if...
Delivery includes stairs or a difficult doorway
Choose Casio PX-770. PX-770 is listed at 31.5 kg and PX-870 at 34.3 kg, a 2.8 kg difference. These are assembled instrument weights, not shipping weights. If access is difficult, arrange suitable delivery and assembly rather than interpreting a shallow cabinet as a light one-person carry.
You want the upgraded console in the same shallow spot
Choose Casio PX-870. Both cabinets are 299 mm deep, while their widths differ by only 2 mm. The PX-870's larger speaker system therefore does not require a deeper listed cabinet. Bench space and delivery access still sit outside that rectangle, which matters more than the tiny width difference.
You require a verified winner for mechanical key noise or personal playing comfort
Choose neither. The manufacturer records do not provide a matched test for those outcomes. Try the instruments in your intended conditions.
What matters in practice
Before you choose
What this comparison cannot tell you
- The comparison uses documented specifications and conditional setup reasoning. We have not measured key feel, mechanical noise or speaker performance side by side.
- Dimensions describe the specified body or cabinet. Leave room for the rest, cables, bench and player.
- Check the exact Amazon model, color, supplied accessories, condition and delivery date before ordering.
What the facts say
What the comparison shows
Useful conclusions from the current digital pianos comparison, followed by the checked facts used to reach them.
See the checked facts and calculation notes
| Product | Needs matched | Checked facts | Source records |
|---|---|---|---|
| Casio PX-770 |
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| Casio PX-870 |
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Ready to choose?
Check the price. Read the owner reviews.
Open either model on Amazon to check the current price, customer reviews and delivery options.
Casio PX-770
Delivery includes stairs or a difficult doorway
See price & reviews on AmazonCasio PX-870
You want the upgraded console in the same shallow spot
See price & reviews on AmazonLinks open in a new tab.