Digital Piano Buying Guide: Keys, Sound and Features Explained
Digital pianos make learning the piano possible in places where an acoustic piano won't fit: small flats, shared homes, or anywhere you need headphones. But spec sheets are confusing. Here is what really matters, in order of importance.
1. The keyboard action comes first
If you want to learn piano technique that transfers to an acoustic instrument, look for 88 fully weighted keys with graded hammer action. "Graded" means the low keys feel heavier than the high keys, just like on an acoustic piano. Lightweight, unweighted 61-key keyboards (such as the Yamaha PSR-E383) are fun for playing songs but won't build the finger strength and control that piano teachers expect.
Within weighted actions there are differences in feel. Roland's PHA-4 (on the FP-30X) and Kawai's RHC (on the ES120) are firmer and more realistic; Casio's Smart Scaled Hammer Action (on the PX-S1100) is lighter and more compact. If possible, try a few in person.
2. Polyphony: why more notes matter
Polyphony is the number of notes the piano can play at once. With the sustain pedal down, notes pile up quickly, and when the limit is reached older notes cut off. 64 notes is the minimum; 128 or more is comfortable; 192–256 means you'll practically never hear notes drop out.
3. Sound and speakers
All the major brands now sample real concert grand pianos, and differences are partly a matter of taste — Yamaha tends to be bright and clear, Kawai warm and rounded, Roland rich and resonant. Speaker power matters more than many people expect: small speakers sound thin in a room, which makes practice less enjoyable. Good headphones are a worthwhile purchase for any portable piano.
4. Pedals
Most portable pianos include a small square footswitch. It works, but a proper piano-style sustain pedal is much more stable and expressive. Some models support half-pedalling or an optional three-pedal unit, which is useful for intermediate players.
5. Connectivity and learning apps
- USB-MIDI lets you connect to learning apps and recording software.
- Bluetooth MIDI and audio (FP-30X, ES120, PX-S1100) remove cables and let you stream backing tracks through the piano.
- Two headphone outputs are ideal for lessons.
6. Portable or console?
Portable pianos are lighter and cheaper but need a stand and bench. Console models come with a cabinet, three pedals and usually better speakers, but they're heavier and take more space. Many learners start with a portable piano on a sturdy stand and upgrade later.
Recommendations by budget
- Tightest budget: Yamaha P-145 or Korg B2.
- Best all-rounder: Roland FP-30X.
- Slim and stylish: Casio Privia PX-S1100.
- Most piano-like feel in a portable: Kawai ES120.
Final tip
Budget for a stand, a bench at the correct height and a real sustain pedal. Good posture and proper pedalling make as much difference to progress as the piano itself.
