Skip Navigation Website Accessibility
Store Hours: Tues-Fri 10-6, Sat 10-3 


NEW Red Roland FR-4X-RD Piano Accordion 37 120

    • 37 keys and 120 left-hand buttons
    • Compact and lightweight
    • Sound module and user interface from the flagship FR-8x
    • Headphones and line outputs
    • 100 accordion sound sets (including 67 pre-loaded sets), 162 orchestral sounds, 32 organ sounds, 3 drum sounds
    • Built-in chorus, reverb, and rotary effects
    • Onboard audio recorder
    • Fast response and high sensitivity from bellows pressure-sensing circuitry
    • Bellows Resistance Regulator to adjust bellows’ inertia
    • Powerful onboard amplification system (two speakers + one tweeter)
    • Character-type LCD screen
    • Four expansion slots for access to additional tone libraries (Balkan and Dallape expansions are pre-installed)
    • Dedicated FR-4x Editor software
    • USB connection and MIDI I/O
    • USB memory port for song playback and recording
    • Powered by AC adaptor or 10 AA-size batteries
    • Available in black or red; made in Italy
Right hand
37 keys (with velocity sensitivity)
Left hand
120 bass buttons (with velocity sensitivity)
Bass & Chord Mode (Left-Hand Keyboard Note Layout)
2 Bass Rows, 3 Bass Rows A-7th, 3 Bass Rows A-5dim, 3 Bass Rows B-7th, 3 Bass Rows B-5dim, 3 Bass Rows Bx-7th, 3 Bass Rows Belgium
Free Bass Mode (Left-Hand Keyboard Note Layout)
Minor 3rd, Bajan, Fifth, North Europe, Finnish
High-resolution pressure sensor for the detection of bellows pressure
Bellows resistance regulator: wheel with fine adjustment
Bellows curve
Fixed Low, Fixed Med, Fixed High, X-Light, Light, Standard, Heavy, X-Heavy, Close, Open, Tango, Traditional, Jazz, Classic, Dynamic1, Dynamic2
Max polyphony
128 voices
Tones (Accordion Set)
100 Accordion Sets
Each Accordion Set includes (number of sounds that can be assigned to the register buttons):
Right Hand Registers: 14 Accordion registers, 14 Orchestra registers, 14 Organ registers
Left Hand Registers: 7 Bass & Chord registers, 7 Free Bass registers,
7 Orchestra Bass registers, 7 Orchestra Chord registers, 7 Orchestra Free Bass registers
Reed Footages
7 Treble, 5 Bass, 3 Chord, 2 Free Bass
Orchestral sounds
* Orchestral sounds can also be used with orchestral bass sounds, orchestral chord sounds, and orchestral free bass sounds.
Organ sounds (Virtual Tone Wheel)
32 presets for Treble, Orchestra Chord and Orchestra Free Bass sections,
16 presets for Orchestra Bass section
Drum Sets
User Programs
98: 7 User Program Bank x 14 registers
Stopping-reed growl, Closing valve noise, Left button noise
Individual Reed Simulation
Hysteresis Threshold, Expression Curve, Pressure-Variant Filter, Pressure-Variant Pitch Deviation
Switching Reed Sound Wave
By bellows acceleration, by note repetition speed
Bellows opening/closing sound change
By bellows opening/closing detection
Micro-Tuning Presets
16 Types: Off, Dry, Classic, F-Folk, American L/H, North Europe, German L/H, D-Folk L/H, Alpine, Italian L/H, French, Scottish
Fine Tuning reed footages 8- / 8+
-100 to 0 to +100
8 types
* Includes delay type.
8 types
* Includes delay type.
Rotary for Organ sound
“Cassotto” simulation
4 Band EQ for Internal Speakers
Knob controls & Registers
Volume, Balance, Reverb, Chorus,
Right hand register buttons 7 x 2
* Use the A/B button to switch between sounds assigned to the register buttons.
Left hand register buttons 7
Navigation switches
Menu/Write, Exit/No, Enter/Yes, Cursor , Value -/+ (Set Down/Up)
Other switches
Right Hand Parts switches (Accordion, Orchestra, Organ)
Left Hand Parts switches (Drums, Orch Bass, Orch Chrd/F.Bass, F.Bass, Bass&Chrd)
User Program, Song List, Play/Pause, Rec, Power
Additional switches
6 user assignable function switches on last row of bass buttons
Right Hand Keyboard Mode
Layer (Zone), High, Low
Octave Shift
-3, 0, +3 for Orchestra
This setting can be saved individually for each set.
-1, 0, +1 for Treble, Orchestra, Organ (Right hand)
This setting can be saved individually for each user program.
Orchestra Chord Guitar Mode
Gtr Table1, Gtr Table2, Gtr Table3
Sound Edit
* The dedicated editor allows full editing.
Bass to Treble
Part Mute
Accordion, Orchestra, Organ, Bass&Chord, Free Bass, Orch Bass, Orch Chord, Orch Free Bass
Bass & Chord with drum/percussion sounds
Programmable drum/percussion sounds for Bass/Orch Bass rows, Chord/Orchestra Chord rows.
Audio Player and Audio REC
MP3/WAV file playback from a USB flash drive, WAV file recording to a USB flash drive
Speakers On/Off
Left-hand Button Keyboard Layer
Custom LCD (8 characters + 16 segments x 4)
Rated Power Output
2 x 11 W
2 x 10 cm
1 x Tweeter
Wave Expansion
4 internal areas (8 MB each) to load new sounds
* When shipped from the factory, sounds are pre-installed in two areas.
Power supply
AC adaptor
Batteries (AA-type rechargeable Ni-MH x 10)
* Expected battery life under continuous use: 5 hours speaker ON mode, 9 hours speaker OFF mode
Current Draw
2,000 mA
Onboard connectors
OUTPUT jacks L/Mono (Treble), R/Mono (Bass): 1/4” phone type
PHONES jack: Stereo 1/4” phone type
INPUT jack: Stereo miniature phone type
MIDI (IN or OUT) connectors
USB COMPUTER port (USB Hi-Speed MIDI support)
(Use a USB cable and a USB port on your computer that supports Hi-Speed USB.)
DC IN jack
AC Adaptor
Power cord (for connecting the AC adaptor)
Owner’s Manual
Reference caps for the bass buttons
Accordion cover
Attachment strip
Option (sold separately)
USB Flash memory
Soft case for accordion (BAG-FR-3)
MIDI foot controller (FC-300)
481 mm
18-15/16 inches
270 mm
10-11/16 inches
430 mm
16-15/16 inches
8.9 kg
19 lbs. 10 oz.
(Without straps and batteries)

Contact Info
  • Liberty Bellows LLC
  • 267-815-4407
  • 614 S. 2nd St.
    Philadelphia, PA 19147
    • Hours:
      Tues-Fri: 10:00 AM–6:00 PM EST
      Sat: 10:00 AM–3:00 PM
      Closed Sundays and Mondays
Get Directions