Roland Boutique JX-03 Sound Module

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  • Battery or USB powered
  • Classic Roland JX-3P sounds
  • Very portable for easy music production
  • 24-bit, 44.1kHz audio interface
  • 0.5W built in speaker for easy listening
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Roland Sound module / synthesizer 

The Roland Boutique JX-03 module is an ultra-compact recreation of the iconic JX-3P synthesiser. The limited-edition 4-voice JX-03 inherits the distinctive JX tonal character, as well as the panel layout of the original PG-200 controller – including all 24 knobs - giving direct and instant access to the versatile synth architecture. The JX-03 features high-quality construction and is highly portable for mobile music making. It can be battery-operated (4xAA) or USB powered. There’s also a built-in 0.5W mini-speaker for instant enjoyment.

The JX-03 adds several updates not found on the original JX-3P, including extra waveforms for the LFO and both DCOs, along with extended DCO range and cross module options. The onboard 16-step sequencer is a sonic scratchpad that lets you try out new ideas without bringing lots of gear – it can even be used without a keyboard. And if there’s no keyboard connected, the ribbon controller lets you preview the sound, making it an ideal way to program patches quickly and easily.

The JX-03 works especially well with the K-25m, an optional 25-key velocity sensitive keyboard that takes your music making to the next level. Once docked in the keyboard, the module’s front panel can be tilted for convenient access to the knobs and sliders. The built-in USB port also functions as a high-quality 24bit, 44.1kHz audio interface, for a fast, simple and reliable way of recording directly to your DAW application. You can keep your favourite patches and sequencer patterns safe too, via the USB data backup function.

The JX-03 features a chain mode that allows you to connect two JX-03 modules using the MIDI ports and create one, 8-voice synthesiser. Adding additional modules adds another 4 voices of polyphony with each module. This is especially great when controlling the JX-03 from a larger external keyboard. You can even edit the sound from the master module and control both units - great for realtime filter sweeps and envelope adjustments.

  • Ultra-compact recreation of the iconic JX-3P synthesizer
  • Retains the feel, sound character and user interface of the original
  • Front panel includes all 24 knobs from the original PG-200 controller
  • Adds several updates not found on the original JX-3P, including extra waveforms for the LFO and both DCOs, along with extended DCO range
  • Chain mode allows two JX-03 to function as one 8-voice module
  • Highly portable for mobile music making
  • High-quality construction with metal front panel
  • Dual ribbon controllers for pitch bend, modulation, and sound preview
  • Battery-operated (4xAA) or USB powered
  • 24 bit / 44.1 kHz stereo IN/OUT USB audio interface
  • Built-in 0.5W mini-speaker for instant enjoyment
  • Compatible with optional K-25m mini-keyboard
Maximum Polyphony 4 voices
User Memory Patch Preset: 8
Patch: 64
Controllers VOLUME knob
Ribbon controllers 1, 2
LFO Section
RATE slider
WAVE FORM select knob
VCO MOD Section
LFO MOD slider
ENV MOD slider
FREQ MOD select switch
PULSE WIDTH MOD select switch
VCO-1 Section
CROSS MOD slider
RANGE select knob
WAVE FORM select knob
VCO-2 Section
SYNC switch
RANGE select knob
WAVE FORM select knob
MIXER Section
HPF Section
CUTOFF slider
VCF Section
CUTOFF slider
SLOPE switch
LFO MOD slider
ENV MOD slider
ENV switch
VCA Section
LEVEL slider
LFO MOD switch
ENV-1 Section
Polarity switch
ENV-2 Section
PATCH NUMBER 1–8 buttons
PATCH PRESET 1–8 buttons
MANUAL button
DUAL button
Power switch
Effects Delay      
Step Sequencer

16 step
16 pattern

Nominal Input Level INPUT jack: -0 dBu
Display 7 segments, 2 characters (LED)
Connectors PHONES jack: Stereo miniature phone type
OUTPUT jack: Stereo miniature phone type
INPUT jack: Stereo miniature phone type
MIDI (IN, OUT) connectors
USB port: MicroB type (Audio, MIDI)

Power Supply

Rechargeable Ni-MH battery (AA, HR6) x 4
Alkaline battery (AA, LR6) x 4
USB bus power
Current Draw 500 mA (USB bus power)
Expected battery life under continuous use Rechargeable Ni-MH battery: Approx. 6 hours
* This can vary depending on the specifications of the batteries, capacity of the batteries, and the conditions of use.
Accessories Owner's Manual
Alkaline battery (AA, LR6) x 4
Options (sold separately) Keyboard unit: K-25m
Size and Weight Width
300 mm
11-13/16 inches
128 mm
5-1/16 inches
46 mm
1-13/16 inches
970 g
2 lbs 3 oz

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