Casio PX-870 BN

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

Quick 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 (spatial sound projection) + Volume Sync EQ

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

• Connectivity: 2 headphone jacks, USB Type A/B, 3-pedal connector, 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. New four-layer stereo grand samples create 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, key-off, and key-action sounds. Result: The inter-string harmonics and subtle resonance nuances written by composers like Debussy and Ravel are expressed in a vivid and convincing manner.

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

Keyboard & Playing Feel — built to be felt

• Tri-Sensor Scaled Hammer Action Keyboard II: the triple-sensor system accurately reads key movement and provides the same "sound timing" feel as a grand piano — meaning the subtle delay between touch and sound is also realistic.

• Simulated ebony & ivory surface: reduces finger slippage, providing comfort during long performances.

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

• 256-note polyphony: prevents note dropouts during complex arrangements and performances with pedal.

Sound Projection — room-filling rich sound

The PX-870's Sound Projection system diffuses piano sounds from different points to surround the listener, just like in a classic grand piano. With 40W (20W+20W) of power and a 4-speaker (12 cm x2 + 4 cm x2, 2-way) configuration, the piano easily fills both a small hall and a home room. Volume Sync EQ ensures a balanced and clear sound across all frequencies, even at lower volume levels — 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; speed can also be adjusted.

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

• Headphone Mode: optimizes sound when playing with headphones — 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: record 99 songs (approx. 25 min/song) in WAV 44.1 kHz format to USB storage.

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

• Daily 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 customize your performance and rapidly improve your practice and performance levels.

Connectivity and expansion

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

• Connector for 3-pedal unit — for connecting a professional pedal unit.

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

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

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 for?

• Students and teachers who want to practice seriously at home

• Singers and composers suitable for small studio and home-performance

• Music schools requiring interactive lessons and duet mode

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

Why the PX-870 Digital piano

• True grand experience: very realistic sound with AiR sound + lid & string resonance.

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

• Prepared for teaching and performance: Concert Play, Duet, two headphone jacks, extensive recorder capabilities.

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

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