Casio$499
Yamaha YDP-S55 specs
The YDP-S55 is the slim-cabinet member of Yamaha's ARIUS line: the same GH3 (Graded Hammer 3) action and CFX-derived piano voice as the YDP-165, but in a 309 mm deep folding-key-cover body designed to sit flat against a wall. It runs VRM Lite for damper and string resonance, has 192-note polyphony and 10 voices, and pairs 20 W x 2 amplification with two 12 cm speakers. It closes the YDP-S series alongside the S35.
Brand: Yamaha
| Status | current |
|---|---|
| Keys | 88 |
| Key action | GH3 (Graded Hammer 3) keyboard with synthetic ebony and ivory keytops |
| Polyphony | 192 |
| Sounds / presets | 10 |
| Sound engine | Yamaha CFX Sampling with VRM Lite (damper resonance and string resonance), key-off samples and Smooth Release |
| Effects | 4 reverb types, Intelligent Acoustic Control (IAC) and Stereophonic Optimizer |
| Speakers | 40 W |
| Bluetooth | No |
| USB audio | Yes |
| Pads / faders | no |
| Weight | 40 kg |
| Dimensions (W×D×H) | [1353, 309, 792] mm |
| Battery power | no |
| Pedals | 3 pedals: damper (half-pedal), sostenuto, soft |
| Key Cover | folding |
| Released | 2022 |
Manuals & documentation
Official manufacturer downloadsSuggest a correction
Strengths
- GH3 three-sensor graded hammer action with synthetic ebony and ivory keytops
- Slim 309 mm deep cabinet with a folding key cover for tight spaces
- USB to Host audio and MIDI for recording straight to a computer
- VRM Lite resonance modelling with half-pedal damper support across three pedals
Weaknesses
- Only 10 preset voices
- No Bluetooth audio or MIDI
- 40 kg with the stand - it is a piece of furniture rather than a portable instrument
Compare the Yamaha YDP-S55 with
Spec source: usa.yamaha.com — verified 2026-10-11