KORG Grandstage X - RH3 Stage Piano with 7 Motors, 700 Sounds and Nutube (Balanced XLR)

KORG Grandstage X - RH3 Stage Piano with 7 Motors, 700 Sounds and Nutube (Balanced XLR)

The Korg Grandstage X is KORG’s new flagship stage piano , completely redesigned to offer immediate access to premium sounds with a clear interface and a carefully crafted two-tone body. It brings together seven sound engines — SGX-2 (acoustic pianos), EP-1 (electric pianos), CX-3 (tonewheel organ), VOX Organ and FC-1 (transistor organs), AL-1 (analog modeling), and HD-1 (PCM)—with 700 performance-ready programs . The RH3 keyboard (A0–C8) responds naturally to dynamics (with no aftertouch), and you can adjust sensitivity on the fly using the Key-Touch Slider . The panel offers instant control of three-part layers and splits , reverb/delay (including Shimmer ), and 3-band EQ . Plus, the Analog Tone circuit with Nutube adds tube warmth, Unison mode fattens FM synths and pianos, and the Rhythm + Chord Progression section (drums and bass) makes it easy to practice and structure arrangements without additional gear.

Main features

• 7 sound engines : SGX-2, EP-1, CX-3, VOX Organ, FC-1, AL-1 and HD-1 to cover pianos, EPs, organs, synths and PCM.
• Library : 700 sounds , preload PCM storage approx. 25.5 GB (linear equivalent ~51 GB) and 100 Favorites (20 preloaded).
• Keyboard : RH3 (A0–C8), velocity response, no aftertouch ; immediate tuning with Key-Touch Slider .
• Polyphony : up to 128 voices with dynamic allocation according to engine/effects.
• 3-part section : Main , Layer and Split with dedicated buttons and faders for simultaneous layers/splits.
• Panel effects : Reverb (Hall, Stage, Room, Spring, Shimmer ) and Delay (Delay, Mod Delay, Tape Echo); 3-band EQ (Low, Mid, High).
• Analog Tone with Nutube : adjustable tube coloration from the panel.
• Unison : fader-controlled voice summing for denser textures.
• Rhythm + Chord Progression : Drum + bass track that follows your chords or plays preset progressions, with dedicated controls.
• Stage Connectivity : Balanced L/R XLR outputs with Ground Lift switch , L/Mono,R outputs on 1/4" TS jack (unbalanced), 1/4" TRS audio input ( balanced , MIC/LINE and level control), 1/4" Headphones , Pedal inputs (Damper with half-damper , Switch and Pedal), MIDI In/Out , USB-B and SD slot .
• Design : Painted aluminum chassis, light ivory top panel, and perforated sides; designed for stage and studio use.

Product benefits

• Ready for live performance : instantly accessible category and favorite selection; physical control of layers, split, unison, reverb/delay, and EQ without complex menus.
• Sound with character : SGX-2 pianos without loops per key and EP-1 with MDS, dedicated organs with rotary , AL-1/HD-1 synths and the organic contribution of Nutube .
• Professional assembly : balanced XLR outputs with Ground Lift for long lines and balanced input for integrating external sources (MIC/LINE).
• Instant Expression : Key-Touch adjusts sensitivity on the fly; Unison thickens patches without external processing.
• Productivity : The rhythm + bass track and progressions help you rehearse, pre-produce, or play solo with musical results.

Use cases

• Tour and venues : dedicated mono pianos, balanced XLR output and 3-band EQ to quickly adapt to any PA.
• Studio : Balanced TRS input with compression/EQ/limiting on the AUDIO IN path for coloring and controlling external sources.
• Theater and TV : Fast sound changes with Favorites and simultaneous layers/splits; dynamics control with Key-Touch.

Frequently Asked Questions

• Does it have aftertouch? No. The RH3 keyboard supports velocity but not aftertouch.
• Are the jack outputs balanced? No. The L/Mono and R outputs are unbalanced TS ; the XLR outputs are balanced and have ground lift .
• Can I use a half-damper? Yes, the Damper input supports a half-damper (DS-1H pedal included).
• Can you combine layers and splits at the same time? Yes, the 3-part section allows simultaneous layer and split operations, as well as fader-based volume control.

Description for projects

Korg Grandstage X stage piano with RH3 keyboard (A0–C8), velocity (no aftertouch); 7 Engines (SGX-2, EP-1, CX-3, VOX Organ, FC-1, AL-1, HD-1); max. 128 polyphony (dynamic assignment); 700 sounds ; PCM preload approx. 25.5 GB (linear eq. ~51 GB); 100 Favorites (20 preload). Panel: Key-Touch slider , Unison , 3-Part Control section, Analog Tone (Nutube) ; Reverb (Hall/Stage/Room/Spring/Shimmer) and Delay (Delay/Mod Delay/Tape Echo); 3-band EQ . Rhythm + Chord Progression section (drums+bass). Connections: Balanced XLR L/R with Ground Lift ; L/Mono, R on 1/4" TS jack (unbalanced); AUDIO IN 1/4" TRS (balanced, MIC/LINE, level control); Headphones 1/4"; Controls: Damper (half-damper) , Switch , Pedal ; MIDI In/Out , USB-B , SD slot . Power consumption 20 W ; Dimensions 1,371 × 461 × 168 mm ; Weight 25 kg . Includes AC cable , music stand and DS-1H footswitch .