Digital Stage Piano


Developed simultaneously with the flagship RD-700SX, the RD-300SX provides the same stunning 88-note multisampled piano found in the flagship, plus 128-voice polyphonic performance, and expanded soundsets. Its feature set is pure heavyweight, but physically the RD-300SX is one of the lightest 88-note pianos in its class — a comfort to transport from gig to gig.

No-Compromise Sound & Feel

With Roland’s most powerful sound engine at its core, the RD-300SX delivers heavyweight specs in lightweight body. Sharing much in common with its high-end sibling, the RD-700SX, the RD-300SX offers 128-voice polyphony, 88-note individually sampled grand piano waveforms, and hundreds of additional sounds and rhythms — from jazz to techno.

Compact Progressive Hammer-Action

The RD-300SX features Roland’s Compact Progressive Hammer-Action keyboard, which simulates a real grand piano by providing a heavier touch in the lower octaves that gets increasingly lighter in the upper range. This keyboard has many of the same design elements as Roland’s acclaimed Progressive Hammer-Action Keyboard, but its keyboard-action mechanism is much more compact and lightweight.

Simple Navigation

Players will appreciate the RD-300SX’s ease of operation and convenient hands-on controls. Dedicated buttons and knobs are provided for instant access to the piano sound, EQ settings, and dual/split keyboard setups. No searching through menus or submenus to find the most common functions; everything you need is within quick reach. Thanks to the handy Setup mode, you can quickly store and recall parameter changes with the touch of a button. A pitch bend/modulation lever has been added for expressive control. Operation is clean and streamlined so you can focus on playing, not programming.

High-Quality Effects

For subtle sweetening or complete transformation, the RD-300SX offers a wide lineup of 78 multi-effect types to choose from, plus independent effects such as reverb, 2-band digital EQ, and Sound Control. Add sparkle to your grand piano sound, deep-fry an electric piano, add depth and spatial movement to strings — the choices are vast.

Lightweight, Compact

It has an impressive, heavy-duty body (with sophisticated black brushed metal finish) but the RD-300SX is actually one of the lightest 88-note piano in its class. At less than 35 pounds (15.5kg), it’s ultra easy to transport — yet built tough enough for the rigors of the road.


Connect the RD-300SX to computers via USB port for one-cable MIDI communication. Standard MIDI in/out ports connectors are provided as well. Master, slave, or solo — the RD-300SX can be played as a standalone instrument, driven from other MIDI gear, or used as the master controller for an entire MIDI setup.

RD-300SX Specifications
88 keys (Compact Progressive Hammer-Action Keyboard)
16 Parts
Maximum Polyphony
128 voices
Wave Memory
64 M bytes (16-bit linear equivalent)
Normal Tones:70General MIDI 2 Tones:256Rhythm Sets:5General MIDI 2 Rhythm Sets:9
Multi-Effects: 78 typesReverb: 4 typesSound Control2-band Digital Equalizer
Rhythm Pattern
185 styles
Zone Level slider x 2, Equalizer knobs, Pitch Bend/Modulation lever
7 segments, 3 characters (LED)
Headphones Jack: Stereo 1/4 inch phone type, Output Jacks (L/MONO, R): 1/4 inch phone type, Pedal Jacks (DAMPER, CONTROL): 1/4 inch TRS phone type, MIDI Connectors (IN, OUT), USB Connector (MIDI), DC IN Jack
Power Supply
DC 9 V (AC adaptor)
Power Consumption
11 W
Owner’s Manual, CD-ROM (Roland Digital Piano USB Driver), Damper Pedal (DP-8), AC Adaptor (PSB-1U), Power Cord
Keyboard Stand: KS-12, Pedal Switch: DP-2, Damper Pedal: DP-8, DP-10, Foot Switch: BOSS FS-5U, FS-6 (TRS phone jacks cannot be used.), Expression Pedal: EV-5, EV-7
Size and Weight
1,408 mm
55-7/16 inches
336 mm
13-1/4 inches
134 mm
5-5/16 inches
15.5 kg
34 lbs. 3 oz.
*The specifications are subject to change without notice.


Updates & Drivers


If you have questions about operating your Roland product, please check our Knowledge Base for answers to the most common questions.
You can also contact our Product Support department by phone or email.
In addition, we have a library of Owner’s Manuals and Support Documents that you can download and reference.

Owner’s Manuals

Support Documents