Boss GM-800 Guitar Synthesizer Pedal with GK-5 Divided Pickup and BGK-15 Serial Cable


The BOSS GM-800 is a next-gen guitar synthesizer pedal driven by Roland’s Serial GK interface along with an advanced Zen-Core sound engine culled from Roland’s flagship synths.

The BOSS GM-800 is a next-gen guitar synthesizer pedal driven by Roland’s Serial GK interface along with an advanced Zen-Core sound engine culled from Roland’s flagship synths. The pedal’s high-performance DSP elicits a natural playing feel and solid tracking, while its vast onboard sound library gives you plenty of room for inspired creativity. Employ the GM-800’s intuitive Scene workflow to freely combine and modify Tones, add color to sounds with a wide range of effects, and discover a world of brand-new content on Roland Cloud. You also get two external control jacks, USB audio/MIDI and standard MIDI connectivity, and a Serial GK expansion jack for connecting to other BOSS guitar synthesizer units. The GM-800 injects your guitar or bass with limitless musical potential. It’s small, sleek, adaptable, and primed for boundless creative excursions.

The GM-800 is powered by the Zen-Core sound engine — the advanced system behind Roland’s lauded Jupiter-X and Fantom synthesizers. This guitar synthesizer pedal puts 1,200 onboard sounds at your fingertips, including acoustic and electric pianos, organs, and orchestral instruments along with classic Roland patches derived from the company’s legendary Jupiter and JUNO synthesizers. The GM-800 gives you access to four Tone parts plus a Rhythm part teeming with acoustic and electronic percussion sounds. You can easily call up a part with dedicated top-panel buttons, then take a deep-dive expedition into its parameters. The Zen-Core engine’s intuitive workflow is built around Scenes, which include tone selection, parameter tweaks, effects, and every other element of a sound. You get 150 user-configurable Scenes, 100 of which come ready to play with pro-crafted factory sounds. Need more sounds? No problem. The GM-800 supports Roland Cloud, supplying access to an ever-growing cache of Zen-Core Sound Packs and Wave Expansions (a 30-day Roland Cloud Ultimate trial is included).

The BOSS GM-800 also includes the Zen-Core engine’s full range of multi-effects. Every Tone and Rhythm part has a dedicated multi-effects processor, from which you can deploy distortions, filters, modulation effects, delays, and a whole lot more. Moreover, each Scene includes two additional effects for processing the combined sound, along with ear-grabbing chorus/delay and reverb with independent send levels from each part. To top it off, you also get a Master Comp and EQ, enabling you to sculpt and mold the GM-800’s master output.

The GM-800 dedicates a high-speed processor solely to tracking, you can expect rock-solid, lock-tight performance, both with electric guitar and electric bass. Tailoring the GM-800 to your playing style is a breeze as well, using easy-to-understand velocity and feel parameters. This permits you to configure a Scene with piano sounds to respond to the dynamic nuances of your playing. Plus, a Scene with old-school analog synth sounds can mimic the fixed velocity response of the original instruments.

Using the BOSS GM-800 as a standalone synthesizer pedal is intuitive and inspiring, by virtue of its four top-panel footswitches. You also get two external control jacks, with each supporting up to two footswitches or an expression pedal, plus 5-pin MIDI I/O for interfacing with external MIDI hardware. You can also craft Tone parts, adjust parameters, and organize your Scenes using BOSS Tone Studio software on your computer. The GM-800’s USB audio/MIDI interface allows you to capture sounds as audio tracks in your DAW or to process recorded sounds in a similar way to re-amping guitar tones. You can use the GM-800’s Guitar to MIDI function to play virtual instruments over USB and trigger hardware modules via MIDI. To top it off, you can use the GM-800 as a MIDI sound module by plugging a hardware controller into its 5-pin MIDI port. The GM-800 is compatible with BOSS GK-5 and GK-5B Divided Pickups or with classic 13-pin GK devices, such as the BOSS SY-1000, via GKC-AD and GKC-DA conversion boxes.

    Tech Specs:

  • Type:Guitar Synth Pedal
  • Presets:100 Factory, 150 Scenes
  • Effects:93 x Multi-FX, 7 x Reverb, 9 x Chrous
  • Inputs:1 x 1/4″ (GK in, BGK digital cable)
  • Outputs:1 x 1/4″ (GK out), 2 x 1/4″ (R/Mono, L/Phones)
  • MIDI I/O:In, Out, USB
  • USB:1 x Type A (Memory), 1 x Type B (Computer)
  • Expression Control:1 x 1/4″ (CTL 3, 4/EXP 1), 1 x 1/4″ (CTL 5, 6/EXP2)
  • Power Source:9V DC (2A) Power Supply (included)
  • Height:2.48″
  • Width:9.68″
  • Depth:5.28″
  • Weight:1.2kg

Additional information

Weight 1.3 kg