Boss GT-1 Guitar Multi-effect

Boss GT-1 Guitar Effects Processor — Pro Tones in a Compact Floor Unit

The Boss GT-1 is a compact floor multi-effects processor built around the Premium BOSS sound engine used in the larger GT-series units. It delivers 108 effect types, 99 user patches, and 99 preset patches in a 1.3 kg battery-powered chassis that fits in a guitar bag.

What Sets the GT-1 Apart

What makes this model stand out is the combination of COSM amp modelling, MDP-powered effects, and a 32-second phrase looper in a single floor unit. The assignable CTL1 footswitch and onboard expression pedal handle tap tempo, volume, wah, and effect parameters in real time, while free BOSS Tone Central patches and the BOSS Tone Studio editor round out the workflow.

Signal Processing and Patch Architecture

The audio engine runs at 44.1 kHz with 24-bit AD/DA conversion using Roland's proprietary AF method for cleaner signal-to-noise performance.

• Studio-grade resolution for amp modelling is provided by the 44.1 kHz sampling frequency.
• AD/DA Conversion: 24-bit + AF method — reduced noise floor across the signal chain
• Effect Types: 108 — overdrive, modulation, delay, reverb, and MDP algorithms
• Phrase Loop: 32 seconds — onboard looper for practice and layering

Connections, I/O, and Power

Mono instrument input, stereo 1/4-inch outputs, and a 3.5 mm TRS headphone jack cover stage and silent-practice setups. USB type B enables direct DAW recording. No MIDI interface exists on this instrument — control is handled via USB and the dedicated footswitch/expression jacks.

• Inputs: 1/4-inch mono, 3.5 mm AUX, FS/Expression jack — guitar, backing tracks, and external control
• Outputs: 1/4-inch mono/stereo, USB type B, 3.5 mm headphone TRS — amps, monitors, DAW, and headphones
• Power: 4 × AA batteries (~7 hours) or PSA-series AC adaptor — busking-friendly with stage-ready AC backup

Controls, Display, and Footprint

Dedicated top-panel buttons for FX1/Comp, OD/DS, Preamp, FX2/Mod, Delay, and Reverb give fast effect-group access, while Easy Select and Easy Edit shorten the path to a usable tone.

• Fast stage edits are enabled by specific buttons for Footswitch, Delay, Memory Edit, Knob, Easy Select, Easy Edit, FX1/Comp, OD/DS, Preamp, and FX2/Mod.
• Display: Graphic LCD, 132 × 32 dots, backlit — readable patch names and parameter readouts in low light
• Dimensions: 305 × 152 × 56 mm — slim profile that fits a guitar bag accessory compartment
• Weight: 1.3 kg (with batteries) — light enough for travel, sturdy enough for the road