Boss XS-1 Poly Shifter Pedal

Boss XS-1 Poly Shifter Pedal

The Boss XS-1 Poly Shifter is a compact pitch-shifting pedal that puts powerful creative tools at your feet without taking up valuable pedalboard space. Built on advanced polyphonic technology, it delivers smooth, glitch-free tracking that handles both single-note lines and full chords with ease. From bold octave drops to delicate detune textures, the XS-1 keeps your tone natural and clear, making it a versatile option for expanding your sound. The Shift knob makes it simple to dial in semitone steps or big interval jumps, while the Balance control lets you blend your dry and shifted signals so you can choose subtle tone colouring or dramatic effects.

Designed for practical use on stage or in the studio, the XS-1 offers instant retune functions for drop tunings or capo-style changes, so you can change key quickly without swapping instruments. Detune mode adds width and richness, while an expression pedal input unlocks real-time pitch bends and shifts that respond to your playing. With its rugged stompbox chassis, lightweight build, and support for external footswitches, the XS-1 is ready for the demands of live performance and flexible enough to inspire new ideas every time you plug in.

Polyphonic shifting that just works

The Boss XS-1 Poly Shifter gives you smooth, natural pitch moves across single-note lines and full chords, so your playing stays tight and musical. Built on advanced polyphonic tech, it delivers fast tracking and a wide six-octave range (three up or three down) so you can go from subtle thickening to bold octave jumps without the weird artefacts. It’s a simple, compact way to add harmony, weight and new colours to your sound without fighting the pedal

Instant retunes for any song

Need a quick drop for heavier riffs or a virtual capo for a higher key? XS-1 makes it easy with instant retune options that keep you in the flow mid-set. Kick in a clean octave down to fake bass lines, stack octave ups for shimmer, or park it on a fixed interval for harmony parts. Detune mode adds that sweet, doubled width for rhythm work or chorus-like sheen on leads, all while keeping your core tone intact

Hands-on control in a stompbox

XS-1 is built to be easily adjusted on stage. The Shift knob snaps between semitone steps and octave jumps, so dialling in intervals is quick and simple. Use Balance to blend dry and wet, then flick the Shift switch for up, down or detune. Choose Toggle for latching or Moment for hold-to-engage tricks. Add an expression pedal for real-time bends and sweeps, and hook up external footswitches to access two extra settings, giving you three tunings on tap without having to scroll through menus

Built for real-world rigs

This compact blue box is tough, light and ready for the board, playing nicely before or after your favourite drives, mod and ambience. It fully handles bass frequencies, so guitarists and bassists can both get in on the action. With the familiar BOSS stomp feel and straightforward layout, it’s the kind of plug-and-play pedal that earns a permanent spot: reliable at gigs, quick in rehearsals, and inspiring in the studio when you need fresh ideas fast

Specifications

Construction

• Dimensions: 73 (W) x 129 (D) x 59 (H) mm

• Weight: 410 g (15 oz)

• Chassis: Compact stompbox with durable metal housing

• Colour: Blue finish with clear control layout

Connectivity

• Input jack: 1/4-inch

• Output jack: 1/4-inch

• Control jack: For external footswitch or expression pedal

Electronics

• Pitch range: ±3 octaves (six octaves total, up to three up or down)

• Pitch control: Shift knob for semitone or octave selection

• Detune mode: Adds width and richness with subtle pitch variation

• Balance control: Adjusts mix between wet and dry signals

• Shift switch: Selects up, down or detune (±20 cents)

• Toggle/Moment switch: Choose latching on/off or momentary hold

• Expression pedal support: Real-time pitch bends and dynamic shifts

• External footswitches: Expand control to three different tunings

• Supported instruments: Fully supports guitar and bass frequencies

• Accessories included: 9V battery, information leaflet

• Power supply: 9V dry battery (included) or optional PSA adaptor

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