Excellent condition. Functions as it should. Includes GR-20, power supply and pickup with mini cable. See pics.

The Roland GR-20 is a compact guitar synthesizer that allows guitarists to access a wide range of synthesizer and instrument sounds using a standard electric guitar.  It is typically sold as a bundle with the Roland GK-3 divided pickup, which is required to capture individual string data for synthesis.

The GR-20 functions as both a guitar synthesizer and a compact effects pedal. It features an advanced sound engine based on Roland’s professional synthesizers, offering 48-voice polyphony for rich, full patches.  The unit comes with over 450 preset sounds and 99 user patches, covering categories such as Strings/Orchestral, Wind, Brass, Bass/Guitar, Organ/Keyboard, Piano, Synth/Lead, Voice/Pad, Ethnic, and Rhythm/Percussion. 

Sound selection is designed for speed and simplicity. Users select a sound category using the Bank knob and choose specific variations with the Number/Value dial.  The interface includes dedicated knobs for quick editing of Attack, Release, Chorus, and Delay/Reverb.  A key feature is the Patch Link function, which allows the GR-20 to synchronize patches with MIDI-capable multi-effects processors like the BOSS GT-6 or GT-8, enabling simultaneous changes to both guitar effects and synth sounds.

The GK-3 Divided Pickup

The system relies on the included GK-3 Divided Pickup to translate guitar playing into MIDI data.  This pickup mounts to the body of any steel-stringed electric guitar without drilling, using adhesive or screws. Key features of the GK-3 include:

• Adjustable Design: It features an adjustable curve to maintain even distance from strings for better tracking response. 

• Cable Management: The pickup cable length is adjustable by coiling excess cable inside the controller unit. 

• Guitar Compatibility: It includes a special attachment plate for Les Paul-type guitars to ensure safe installation. 

• Blend Control: A large knob on the pickup allows players to blend the natural magnetic pickup signal with the synthesized sound in real-time. 

• Connectivity: It uses a standard 1/4" jack for the normal guitar signal and a 13-pin cable for the synth data. 

  Connectivity and Installation

Setting up the GR-20 involves connecting the GK-3 pickup to the unit via the supplied 13-pin cable. The system offers flexible output options:

• GK IN: Connects the 13-pin cable from the pickup. 

• GUITAR OUT: Carries the dry, natural guitar signal to a separate amp or effects chain. 

• OUTPUT L/R: Sends the synthesized audio to a mixer, PA, or amplifier. Note that synth sounds do not come out of the GUITAR OUT jack. 

• MIDI IN/OUT: Allows integration with external MIDI gear.

Users can play the natural guitar tone, the synth tone, or a blend of both simultaneously. The digital pitch detection technology provides fast tracking, minimizing latency between playing a note and hearing the synth sound. 

Since 1979, we at Mom's Music have worked hard to make the Louisville, KY music scene something special.  Now, we’re working hard to share what makes us great with the world.  We take pride in our care and attention to detail regarding every instrument and musician that comes through the store, and every instrument we receive gets a thorough inspection and setup when it arrives in our shop and prior to shipment.
All orders placed will require a signature upon arrival.  If a different arrangement is preferred, send us a message or give us a call.