A slim Privia for someone who wants accompaniment and a broad sound library as well as a piano.
Who I would put this on the shortlist for
A player who will use rhythms, registrations, assignable controls and recording rather than leaving the instrument permanently on its first piano sound.
What to check before buying
More sounds do not establish a better piano action. The Bluetooth adapter and a recording flash drive use the USB-A connection, so plan that workflow rather than assuming both stay connected at once.
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Listed by the manufacturer for the US market when checked; dealer stock, finishes, bundles and regional features must be confirmed before purchase.
From the service side
My technician’s perspective
Ownership advice — not an exact-model repair report
This entry is based on published specifications and practical ownership considerations. No exact-model, first-hand repair case is being claimed here. For a problem with a Casio you already own, send me the full model number, what the instrument does, and whether the symptom occurs through headphones as well as the speakers.
Casio PX-S3100 specifications
Manufacturer specifications unless a source states otherwise. Unknown details stay unverified. Model and finish variants may differ.
- Number of keys
- 88
- Keyboard action
- Smart Scaled Hammer Action
- Piano sound engine
- Multi-dimensional Morphing AiR
- Maximum polyphony
- 192
- Voices / tones
- 700
- Amplifier output
- 8 W × 2
- Weight (manufacturer configuration)
- 11.4 kg; without batteries
- Dimensions: W × D × H
- 1322 × 232 × 102 mm; without music rest
- USB MIDI
- Yes — USB-B
- USB audio interface to a computer
- Not listed — USB MIDI and flash-drive audio are distinct
- Bluetooth audio input
- Yes — via included WU-BT10 adapter
- Bluetooth MIDI
- Yes — via included WU-BT10 adapter
- 5-pin DIN MIDI
- No
- Dedicated line outputs
- 6.35 mm L/Mono and R
- Headphone sockets
- 2 × 3.5 mm stereo
- Pedals and half-pedaling
- SP-3 included; optional SP-34 three-pedal / half-damper
- Onboard recording
- 3-track MIDI, 5 songs; USB-drive WAV recording
- Battery operation
- Yes — 6 AA batteries
- Included / optional setup
- WU-BT10 and SP-3; CS-68P stand optional
- Other useful features
- 200 rhythms; pitch bend; assignable knobs
Related advice and repair articles
Sources and scope
Technical data checked 2026-09-22. This is an editorial buying guide, not a laboratory test or a measured reliability study. No exact-model repair is implied unless identified above.
- Casio specifications and product information (manufacturer)
