The Boss XS 100 Poly Shifter is a Boss pitch shifter pedal, currently around $331.55. Close alternatives include the DigiTech Whammy MN Mono Neon and the EVH Pitch Fork. It pairs well with the Revv Generator G20 20-Watt 2-Channel Tube Head and the Mesa/Boogie JP-2C John Petrucci Signature 60/100-Watt.

Boss XS 100 Poly Shifter

Boss · pedal

The Boss XS-100 Poly Shifter is a flagship polyphonic pitch-shifting pedal with an integrated expression pedal for real-time whammy-style pitch control. Offers a total range of eight octaves (four up and four down) with 30 user memories, MIDI connectivity, USB-C, and adjustable pitch-change speeds for each pedal direction enabling motor-revving and dive-bomb effects. Two additional footswitches enable instant pitch bypass and fixed semitone retuning. An LC screen manages presets. Reviewed by Guitar World and Guitar.com. Priced at $349.99.

What stands out

  • “The Boss XS-100 Poly Shifter is a flagship polyphonic pitch-shifting pedal with an integrated expression pedal for real-time whammy-style pitch control”

    — from the listing

  • “Two additional footswitches enable instant pitch bypass and fixed semitone retuning”

    — from the listing

  • “Offers a total range of eight octaves (four up and four down) with 30 user memories, MIDI connectivity, USB-C, and adjustable pitch-change speeds for each pedal direction enabling motor-revving and dive-bomb effects”

    — from the listing

  • “The XS-100 delivers the full range of pitch-shifting performance from subtle detune through extreme whammy effects to drop tuning and key changes, with the integrated expression pedal giving it the hands-on dynamic control that separate pit…”

    — from the community notes

  • “its standout strength is the eight-octave range combined with programmable expression curves and 30 memories for complex preset-based performance”

    — from the community notes

  • expression pedal
  • pitch
  • octave
  • whammy
  • midi
  • subtle
  • usb
  • complex
$331.55View on Reverb

Price updated Oct 23, 2026

Genres the Boss XS 100 Poly Shifter is commonly used in

  • Alternative Rock
  • Experimental
    citedInferred from shared tonal signals, not a stated genre tag.

Amps that pair well with the Boss XS 100 Poly Shifter

Revv Generator G20 20-Watt 2-Channel Tube Head

Revv

22% match
$1199via Reverb

Revv Generator G20 20-Watt 2-Channel Tube Head leans toward high gain, and that's a real, usable character to pair with

Comes later in the signal chain

Mesa/Boogie JP-2C John Petrucci Signature 60/100-Watt

Mesa Boogie

tonal match

Comes later in the signal chain

Mesa/Boogie JP-2C John Petrucci Signature 60/100-Watt goes after Boss XS 100 Poly Shifter in the chain

Marshall Studio JCM900 SN20H

Marshall

tonal match

Comes later in the signal chain

Marshall Studio JCM900 SN20H goes after Boss XS 100 Poly Shifter in the chain

Synergy SL2 Module

Synergy

tonal match

Comes later in the signal chain

Put Synergy SL2 Module after Boss XS 100 Poly Shifter

Friedman BE-Mini Head

Friedman

tonal match
$196.01via Reverb

Comes later in the signal chain

Put Friedman BE-Mini Head after Boss XS 100 Poly Shifter

Hughes & Kettner Warp 7

Hughes & Kettner

tonal match

Comes later in the signal chain

Put Hughes & Kettner Warp 7 after Boss XS 100 Poly Shifter

Egnater Tourmaster Combo 4212

Egnater

tonal match
$380via Reverb

Comes later in the signal chain

Egnater Tourmaster Combo 4212 goes after Boss XS 100 Poly Shifter in the chain

Hughes & Kettner Coreblade

Hughes & Kettner

tonal match

Comes later in the signal chain

Hughes & Kettner Coreblade goes after Boss XS 100 Poly Shifter in the chain

Pedals that stack with the Boss XS 100 Poly Shifter

Fjord Fuzz Odin

Fjord Fuzz

26% match
$199via Reverb

The Odin's doom-heavy stoner fuzz gives the XS 100's subtle pitch shifting a genuinely dense, saturated signal to divide.

Comes later in the signal chain

EarthQuaker Devices Dirt Transmitter

EarthQuaker Devices

26% match
$179via Reverb

Stack the Dirt Transmitter's low-noise gain with the XS 100's own subtle, whammy-style pitch shifting for a driven signal with real harmonic layering.

Comes later in the signal chain

Electro-Harmonix XO Deluxe Memory Man

Electro-Harmonix

9% match
$175.89via Reverb

Run the Memory Man's lush analog echo after the XS 100's subtle, whammy-style pitch shifting and the repeats carry the harmonic layers forward. — goes in the amp's FX loop (or last, into a clean amp)

Comes later in the signal chain

Cusack Music Delay TME

Cusack Music

7% match
$159.99via Reverb

Put Cusack Music Delay TME after Boss XS 100 Poly Shifter in the signal chain, where it won't crowd Boss XS 100 Poly Shifter — goes in the amp's FX loop (or last, into a clean amp)

Comes later in the signal chain

Death By Audio Destruction

Death By Audio

tonal match
$137.70via Reverb

Comes later in the signal chain

Death By Audio Destruction goes after Boss XS 100 Poly Shifter in the chain

Dr. Scientist Frazz Dazzler V2

Dr Scientist

tonal match
$203.84via Reverb

Comes later in the signal chain

Put Dr. Scientist Frazz Dazzler V2 after Boss XS 100 Poly Shifter

Subdecay F-Bomb

Subdecay

tonal match
$229.95via Reverb

Comes later in the signal chain

Subdecay F-Bomb goes after Boss XS 100 Poly Shifter in the chain

Warm Audio Jet Phaser

Warm Audio

tonal match
$109.24via Reverb

Comes later in the signal chain

Warm Audio Jet Phaser goes after Boss XS 100 Poly Shifter — modulation reads clearest once the core tone is set

Cheaper alternatives

Electro-Harmonix Pitch Fork Polyphonic Pitch Shifter

Electro-Harmonix

66% similarity
$148.50via Reverb

Shared character: whammy, expression pedal, one octave

DigiTech WH-1 Whammy Pedal

Digitech

64% similarity
$211.07via Reverb

Shared character: whammy, expression pedal, one octave

Electro-Harmonix Slammi Plus

Electro-Harmonix

63% similarity
$126.05via Reverb

Shared character: whammy, expression pedal, one octave

Boss PS-5 Super Shifter

Boss

57% similarity
$99via Reverb

Shared character: whammy, expression pedal

Boss PS-6

Boss

54% similarity
$139.99via Reverb

Shared character: expression pedal, one octave, subtle

Digitech Whammy 5

Digitech

51% similarity
$184.68via Reverb

Shared character: whammy, expression pedal, one octave

Similar charactersee all similar tone character →

DigiTech Whammy MN Mono Neon

Digitech

60% similarity

Shared character: whammy, expression pedal, one octave

EVH Pitch Fork

Evh

57% similarity

Shared character: expression pedal, one octave, full

Meris MR Hedra

Meris

47% similarity

Shared character: whammy, one octave

Eventide PitchFactor

Eventide

41% similarity
$424.69via Reverb

Shared character: expression pedal

Boss X-100 Poly Shifter

Boss

100% similarity
$331.55via Reverb

similar tone character

Alexander Pedals Fever Pitch

Alexander Pedals

91% similarity
$299via Reverb

similar tone character

See all alternatives to the Boss XS 100 Poly Shifter (cheaper + boutique) →

Questions people ask

What are good alternatives to the Boss XS 100 Poly Shifter?+

The closest matches in character are the DigiTech Whammy MN Mono Neon, the EVH Pitch Fork, the Meris MR Hedra. Budget picks: Electro-Harmonix Pitch Fork Polyphonic Pitch Shifter, DigiTech WH-1 Whammy Pedal, Electro-Harmonix Slammi Plus.

What pairs well with the Boss XS 100 Poly Shifter?+

Strong matches from rig and tone-complementarity evidence: Revv Generator G20 20-Watt 2-Channel Tube Head, Mesa/Boogie JP-2C John Petrucci Signature 60/100-Watt, Marshall Studio JCM900 SN20H — Revv Generator G20 20-Watt 2-Channel Tube Head leans toward high gain, and that's a real, usable character to pair with.

How much does the Boss XS 100 Poly Shifter cost?+

Around $331.55 (live listing price, updated Oct 23, 2026).

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