Boss XS-1 Compact Poly Shifter

Instant Retuning with Natural Tone and Precision

The BOSS XS-1 Poly Shifter delivers instant pitch shifting in a compact, pedalboard-friendly design. Powered by advanced BOSS polyphonic algorithms, the XS-1 transforms your instrument’s tuning with zero latency, pristine clarity, and complete tonal integrity — whether shifting down for drop tunings, simulating a capo, or exploring bold octave effects.

Next-Generation Pitch Technology

Built on years of BOSS research and innovation, the XS-1 sets a new benchmark for pitch-shifting performance. Its powerful DSP platform preserves your guitar or bass’s natural character, attack, and dynamics — even during complex chords or sustained lead tones. The result is authentic, balanced sound across every tuning or octave range.

Performance Freedom, No Retuning Required

Forget swapping instruments mid-set or pausing to retune. The XS-1 lets you change keys, tunings, and octave ranges on demand, making it ideal for live performers and session players alike. From drop-tuned rock and pop arrangements to creative layered textures, this pedal keeps your performance seamless and in tune.

Wide Range, Easy Control

Offering a ±7 semitone and ±3 octave pitch range, the XS-1 adapts to any musical context. The intuitive Balance knob blends dry and shifted signals, while the Detune mode creates lush, chorus-like doubling effects. Simple, responsive controls make on-the-fly adjustments effortless.

Dynamic Creative Options

The XS-1’s switchable pedal modes let you choose between toggle and momentary operation. Expand your control further with optional footswitches or an expression pedal to instantly access alternate tunings or perform smooth pitch bends.

Specifications

• Pitch Range: ±7 semitones / ±3 octaves

• Controls: Shift, Balance, Detune, Pedal Mode

• Power: 9V battery (approx. 3 hrs) or PSA adaptor (sold separately)

• Current Draw: 120 mA

• I/O: Mono in/out, external footswitch / expression pedal input

• Dimensions: 73 × 129 × 59 mm

• Weight: 410 g (with battery)

• Accessories: 9V battery, safety leaflet

• Compatible Accessories (sold separately): FS-5U, FS-6, FS-7, EV-30, FV-500L/H, Roland EV-5

• Warranty: BOSS 5-year warranty