Boss GM-800 Guitar Synthesizer Pedal

In stock

Brand new!

The BOSS GM-800 effects pedal elevates guitar synthesis into a new age of natural playability and boundless creative range. Driven by the Serial GK interface, the advanced ZEN-Core sound engine unlocks any sound imaginable—from acoustic instruments to classic and modern synths—while high-performance DSP delivers tracking stability and expressive scope never before possible. Freely combine and edit Tones with the intuitive Scene workflow, color sounds with a huge selection of effects, and explore a universe of fresh content on Roland Cloud. Compact, streamlined and ultraversatile, the GM-800 infuses your guitar or bass with unlimited musical potential.


  • Next-generation guitar and bass synthesizer with the Serial GK interface
  • Advanced ZEN-Core sound engine derived from flagship Roland synthesizers
  • Natural playing feel and solid tracking stability, realized through high-performance DSP
  • Powerful Scene workflow with four Tones plus Rhythm
  • Vast onboard sound library with over 1200 Tones and 70 Rhythm sounds
  • Explore Sound Packs, Wave Expansions, legendary Roland instruments, and more on Roland Cloud
  • Deep editing tools for each Tone, including sound parameters, sensitivity settings, and more
  • 150 user-configurable Scenes, including 100 Scenes with professional ready-to-play sounds
  • Over 90 total effect types available in each Scene
  • Space-saving design flows into every setup, from pedalboard to desktop
  • Serial GK expansion jack for connecting to another BOSS guitar synthesizer product
  • Two external control jacks, each with support for up to two footswitches or an expression pedal
  • USB audio/MIDI connectivity and standard MIDI I/O
  • Guitar to MIDI function for playing external MIDI instruments via USB or a MIDI cable
  • Also functions as a standalone synthesizer sound module for MIDI keyboard use or DAW sound expansion
  • Edit Scenes and organize sounds on your computer with BOSS Tone Studio


- Preset tone: 1,200 or greater
- Preset Drum Kit: 70 or greater
- Import tone: 256
- Scenes: 150

- Part Multi-Effects: 1 system (for each part), 93 types
- Part EQ: 1 system (for each part)
- Reverb: 7 types
- Chorus/Delay: 9 types
- Scene MFX: 2 systems (Serial or Parallel selectable), 93 types
- Master EQ/Comp

- Nominal Output Level: -10 dBu
- Maximum Output Level: +7 dBu
- Output Impedance: 44 ohms

- Power Supply: AC adapter
- Current Draw: 840 mA

- Dimensions (WxDxH): 9-11/16" x 5-9/32" x 2-9/16" (including rubber foot)
- Weight (excluding AC adaptor): 2 lb.

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