Casio PX-870 BK

Casio Privia PX-870 is a console-style digital piano, the flagship of the Privia series, designed to bring a true grand piano experience into the home or studio. With authentic sound and feel, a modern elegant cabinet design, and a powerful Sound Projection system, the PX-870 is an instrument that will inspire performers, teachers, and music enthusiasts alike.

Brief summary (key highlights)

• Sound source: Multi-Dimensional Morphing AiR Sound Source (4-layer stereo grand)

• Keyboard: Tri-Sensor II Scaled Hammer Action (simulated ebony & ivory) — 88 keys

• Polyphony: 256 notes

• Sound system: Sound Projection — 40W, 4-speaker (multi-directional sound) + Volume Sync EQ

• Internal content: 19 tones, 60 built-in songs, Concert Play (10 orchestral recordings)

• Connections: 2 headphone jacks, USB Type A/B, 3-pedal unit connection, slide-type keyboard cover

• Color: black / white / oak (various finishes)

Sound technology — the closest reality to a grand piano

The heart of the PX-870 is the Multi-Dimensional Morphing AiR Sound Source. The new four-layer stereo grand samples produce richer, more natural, and sustained tones. This system simulates not only the sound of the strings but also the resonance of the entire piano cabinet, damper resonance, and key-off and key-action noises. The result: the inter-string harmony and delicate resonance nuances composed by masters like Debussy and Ravel are expressed vividly and convincingly.

Lid Simulator, String Resonance, Key Off Simulator, and Key On / Off Action Noise details ensure the PX-870 presents all stages of sound dynamics from start to decay in a natural way.

Keyboard & Playing Feel — created to be felt

• Tri-Sensor Scaled Hammer Action Keyboard II: a triple-sensor system precisely reads key movement and provides the same "sound timing" feel as a grand piano, including realistic subtle delays between touch and sound.

• Simulated ebony & ivory: finish reduces finger slippage and ensures comfort during long performances.

• Adjustable touch & hammer response: settings to suit different playing styles.

• 256-note polyphony: prevents sound dropouts during complex arrangements and pedal-heavy passages.

Sound Projection — rich sound that fills the room

The PX-870's Sound Projection system emits piano sounds from various points to envelop the listener, just like a classic grand piano. With 40W (20W+20W) power and a 4-speaker (12 cm x2 + 4 cm x2, 2-way) configuration, the piano easily fills both small salons and living rooms. Volume Sync EQ ensures balanced and clear sound across all frequencies even at lower volumes, making it ideal for night practice and headphone use.

Teaching, performance, and interactive functions

• Concert Play: play along with 10 live orchestral recordings. LISTEN/LESSON/PLAY modes allow you to mute the piano part and play yourself; the tempo can also be adjusted.

• Duet Mode: splits the keyboard into two equal ranges for teacher and student collaboration.

• Headphone Mode: specially adjusts sound when playing with headphones for a natural feel and spacious stage effect. The PX-870 features two ¼” stereo jacks on the front panel, allowing two people to use headphones at once.

• Instant / Audio Recorder: allows recording up to 99 songs (approx. 25 min/track) to USB memory in WAV 44.1 kHz format.

• MIDI Recorder: 2 tracks, ~5,000 notes — real-time recording and playback.

• Everyday convenience features like slide-type keyboard cover and Auto Power Off.

Effects, acoustic simulations, and voices

• Hammer Response (4 levels), Key Off Simulator, String Resonance (4 levels), Damper Resonance (4 levels), Damper/Key Action Noise

• Hall Simulator (4 types), Reverb (4 types), Chorus (4 levels), Brilliance (-3 ~ +3), DSP presets

• Layer / Split, Octave Shift (-2 ~ +2), Transpose (-12 ~ +12 semitones), Tuning Control (A4 = 415.5 ~ 465.9 Hz)

• Scales: Equal temperament + 16 variations

• Metronome: 0–9 beats, 20–255 BPM, tap tempo support

This rich arsenal helps you design your performance as you wish and rapidly improve your practice and performance levels.

Connectivity and expansion

• USB Type A & Type B (class-compliant): fast, driver-free connection with PC/Mac/iOS/Android.

• Connector for 3-pedal unit — for professional pedal unit connection.

• PHONES/OUTPUT: 2 (stereo standard jack) — for two headphones or separate outputs.

• CASIO Music Space app support for mobile control, sound settings, and lesson capabilities.

Technical Summary (brief)

• Keyboard: Tri-Sensor II, 88 keys

• Sound source: Multi-Dimensional Morphing AiR

• Polyphony: 256

• Tones: 19

• Internal songs: 60 (+ 10 user songs)

• Sound system: 12 cm x2 + 4 cm x2 (2-Way, 4-Speaker)

• Amplifier: 20W + 20W

• Dimensions: 1,393 × 299 × 801 mm (w/o music stand)

• Weight: 34.3 kg

• Power source: AD-E24250LW (DC 24V)

• Colors: Black / Oak / White (varies by model)

• Included: AC adapter, music stand

Who is it suitable for?

• Students and teachers who want to practice seriously at home

• Singers and composers suitable for small studios and home performances

• Music schools requiring interactive lessons and duet mode

• Those looking for a realistic grand piano experience in a compact format

Why the PX-870 Electronic piano

• True grand experience: AiR sound + lid & string resonance for highly realistic sound.

• Room-filling sound: Richer stage effect with Sound Projection system.

• Designed for teaching and performance: Concert Play, Duet, dual headphone outputs, extensive recorder features.

• Convenient connectivity: USB Type A/B, 3-pedal connector — comfortable for both studio and home use.

• Aesthetic and functional: elegant cabinet, sliding cover, and various finish options.