1. Full-Range Paper Cone Speakers (Most Common)
Materials: Paper diaphragm with rubber surround, paired with a ferrite magnet.
Features:
Low cost, suitable for mid-low frequency response with a warm tone.
Commonly found in entry-level keyboards (e.g., Casio CT series, Yamaha PSR-E series).
Typical size: 4~6 inches, power rating: 5~20W (paired with built-in amplifiers).
2. Dual Speaker Systems (Mid-to-High-End Models)
Configuration: Two full-range speakers (either stereo or with frequency separation).
Features:
Improves soundstage width and dynamic range (e.g., Yamaha PSR-SX series, Korg PA series).
May include passive radiators for enhanced bass.
3. Tweeter speaker + Crossover Circuits
High-end models (e.g., Roland FP-90X, Nord Stage) may feature:
Silk-dome tweeters: Enhances clarity for piano/organ high frequencies.
Crossover circuits: Separates high/low frequencies to reduce distortion.
4. Passive Speakers + External Amps
Some stage pianos (e.g., Yamaha CP88) omit built-in speakers and require:
Monitor speakers (e.g., JBL EON series).
PA systems (for professional performances).
5. Flat Panel Speakers(vibration speaker) (Portable Designs)
Rare in ultra-thin keyboards (e.g., Roland GO:KEYS):
Lightweight flat speakers, prioritizing portability over sound quality.
Buying Tips:
Home practice: Built-in speakers are sufficient, namely box speaker(look for ≥10W power speaker).
Live/recording: Recommend external pro speakers (e.g., Roland KC series).
Repairs: Match impedance (typically 4~8Ω) and power when replacing speakers.