The Casio PX-S1100 is the current version of Casio's Privia S-series — the slimmest, most modern-looking digital piano line in the entry segment. It offers a weighted action and Casio's best sound technology at a price below the Roland and Kawai competitors.
Key Specifications
| Spec | PX-S1100 |
|---|---|
| Keys | 88, Smart Scaled Hammer Action Keyboard |
| Sound Engine | Multi-dimensional Morphing AiR |
| Polyphony | 192 voices |
| Tones | 18 |
| Connectivity | Bluetooth MIDI/Audio, USB |
| Weight | 9.3 kg |
Smart Scaled Hammer Action
Casio's Smart Scaled Hammer Action has key weight that varies from bass to treble — heavier in the bass, lighter in the treble — providing a more piano-like feel than unweighted or semi-weighted options. The action does not include escapement simulation (the slight bump that mimics grand piano key mechanism), which is present in Roland FP-30X, Kawai ES120, but not Yamaha P-125A either at this price tier. For a beginner's first piano, the SSHA is functional and teaches correct touch response.
Multi-dimensional Morphing AiR Sound
AiR (Acoustic and intelligent Resonator) technology samples acoustic piano at multiple dynamic levels and smoothly interpolates between them. The "morphing" aspect means that intermediate dynamic levels are interpolated from multiple recordings rather than using a single velocity-switched sample. This produces smoother, more natural dynamic response than single-sample-per-note systems. The result is a piano tone that responds realistically to how hard you press.
Design and Portability
At 9.3 kg and the slimmest profile in its class, the PX-S1100 is the easiest to move and store of any 88-key weighted piano. For players in small apartments or those who need to transport the piano regularly, the physical form factor is a real advantage. The design is modern and visually minimal.
Value Consideration
The PX-S1100 at approximately ¥44,000 is significantly cheaper than Roland FP-30X (¥77,000) and Kawai ES120 (¥77,000). The action quality gap is real — Roland and Kawai provide more realistic key feel. For players who need a weighted piano at the absolute lowest cost, the PX-S1100 delivers functional quality. For players who can stretch the budget, the FP-30X or ES120 are better long-term investments for serious piano study.
Frequently Asked Questions
Is the Casio PX-S1100 good for beginners?
Yes for budget-constrained beginners — it has weighted keys, 88 full keys, and decent sound quality. The action is simpler than Roland and Kawai competitors, but it teaches proper piano technique. If you can afford the Roland FP-30X or Kawai ES120, those are better investments for serious study. The PX-S1100 is for those who need the lowest possible entry price with 88 weighted keys.
What is the lightest 88-key digital piano available?
The Casio PX-S1100 at 9.3 kg is one of the lightest full 88-key weighted digital pianos available. Compared to Roland FP-30X (11.4 kg) and Yamaha P-125A (11.8 kg), the Casio is significantly more portable while maintaining 88 keys and a weighted action.