DISC Boss SL-20 Slicer Guitar Effects Pedal

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  • Creating Pulsating Percussive ''Chopped'' Soundscapes
  • Includes 50 Slice Patterns with Adjustable Attack & Duration
  • Tap Tempo Via Onboard Footswitch or MIDI Synch
  • Expression Pedal Input Offers External Control Over Parameters
  • Use with Guitar, Bass, Keyboard, Music Players, & Vocals

DISC Boss SL-20 Slicer Guitar Effects Pedal

The Boss SL-20 Slicer Guitar Effects Pedal allows players to inject their performances with a unique ''chopped'' effect, turning their instrument into a pulsating groove machine. Players can choose from 50 onboard slice patterns, or experiment with the wide variety of control to create their ideal sound. The addition of an output mode button expands the SL-20's tonal capabilities, offering a whole host of different options including the unique 3D panning for spacious sliced soundscapes. The SL-20 is ideal for deliver a whole new side to your guitar, bass, keyboard, and vocals, while DJs and dance-music artist can connect music-playback devices, making it an incredibly powerful rhythm-performance tool. Also equipped with tap tempo and expression pedal capabilities, the Boss SL-20 Slicer is a gate way to instant groove and a unique performance.

Product Ref: 11688

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Inject High-Octane Fuel into You Music

The SL-20 Slicer is designed to transform your instrument into a pulsating wave of groove, creating a striking percussive ''chop'' that will enhance anyone's performance. Not only does it come equipped with 50 onboard slice patterns, with adjustable note attack and duration, players can experiment with the SL-20’s innovative harmonic slicer feature, generating everything from percussive melodies, to loop recording and unique 3D panning. A selectable output mode is also included, offering a wide selection of settings to achieve different effects and create your ideal sound. The SL-20 slicer also offers the choice between latching and momentary pedal modes, allowing players to deliver the chopped effect in a varitty of different ways.

Flexible & Universal

Along with its host of features that will inspire the creative musician, the Boss Slicer is designed to ensure no one is limited to just the guitar. Use it with basses, keyboards, and vocals, the SL-20 is perfect for creating high energy patterns in real-time on stage or in the studio. The Slicer also allows the connection of music-playback devices, making it a perfect rhythm-performance tool for DJs and dance-music artists. If that wasn’t enough, the Boss SL-20 also comes equipped with tap tempo which can be controlled via the pedal switch or MIDI, and an expression pedal input for external control over the attack, duration, effect level, and direct level.


  • Instant groove and percussive-melody generator
  • 50 Slice patterns onboard, with adjustable attack and duration, including Harmonic Slice
  • Tap Tempo via onboard pedal switch and MIDI sync
  • Sound characteristics such as attack, duration, effect level, and direct level are controllable via external expression pedal (sold separately)
  • Variety of output modes, including the unique 3D Panning for spacious sliced FX



  • Nominal Input Level: -20 dBu
  • Input Impedance: 1 Mohm
  • Nominal Output Level: -20 dBu
  • Output Impedance: 1 kohm
  • Recommended Load Impedance: 10 kohms or Greater
  • Tempo: Quarter Note 30 to 250 bpm
  • Maximum Recording Time: 40 Sec.
  • Controls:
    • Pedals: Star/Stop, Tap
    • Knobs: Effects Level, Direct Level, Bank, Pattern, Attack, Duty, Tempo
    • Buttons: Output Mode, Pedal Mode
  • Connectors:
    • Input Jacks R/Mono, L (1/4’’ Phone Type)
    • Output Jacks R/Mono, L (1/4’’ Phone Type)
    • EXP Pedal Jack (1/4’’ TRS Phone Type)
    • MIDI in Connector
    • DC in Jack (DC 9 V)
  • Power Supply: DC 9V Dry Battery (AA Type), AC Adaptor (Sold Separately)
  • Current Draw: 110 mA
  • Accessories: Owner's Manual, Leaflets, Dry battery (R6 (AA) Type (Carbon) x 6)


  • Width: 6.8125’’ (173 mm)
  • Depth: 6.25’’ (158 mm)
  • Height: 2.25’’ (57 mm)
  • Weight: 1.1kg (2lbs 7oz)