A more substantial Celviano with a hybrid action, a four-speaker layout and more developed pedal control.
Who I would put this on the shortlist for
A dedicated home player comparing a complete console setup rather than a portable keyboard and stand. The action, pedal response and headphone experience are the useful things to audition.
What to check before buying
Allow for delivery and assembly. Try the visual information bar and Instant RePlayer before deciding whether they add value to your practice; neither substitutes for liking the keyboard itself.
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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 AP-550 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 Hybrid Hammer Action, CELVIANO Edition; wood/resin
- Piano sound engine
- Multi-dimensional Morphing AiR
- Maximum polyphony
- 256
- Voices / tones
- 26
- Amplifier output
- 20 W × 2; four speakers
- Weight (manufacturer configuration)
- 49.5 kg
- Dimensions: W × D × H
- 1401 × 440 × 891 mm; without music stand
- 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
- No dedicated line outputs listed; headphone/output sockets
- Headphone sockets
- 2 × 6.35 mm stereo
- Pedals and half-pedaling
- Three fixed pedals; continuous damper; soft 2 levels plus off
- Onboard recording
- 2-track MIDI; USB-drive WAV; Instant RePlayer
- Battery operation
- No — AC power
- Included / optional setup
- Cabinet, pedals, WU-BT10 and adjustable bench (US listing)
- Other useful features
- Not verified
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)
