The BOSS XS-1 Poly Shifter packs cutting-edge performance into a compact pedal. Powered by advanced polyphonic pitch-shifting technology built on decades of expertise.
4.8
11 Reviews
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Meet the BOSS XS-1 Poly Shifter, the pitch-shifting powerhouse that transforms your guitar, bass, or any instrument into a sonic shapeshifter. Want to add celestial harmonies an octave higher or dive into deep, subterranean growls? This magnificent machine molds your melodies with pitch-perfect precision, delivering a sound so pristine it will leave your audience speechless. Get ready to shift, sculpt, and seriously stun, this pedal delivers crystal-clear pitch shifts that'll make your audience do a double-take.
Features That Hit All the Right Notes
Built with BOSS's latest algorithms, the XS-1 doesn't just change your pitch — it preserves the soul of your sound. From subtle detune effects that add richness and depth to dramatic octave jumps that redefine your instrument entirely, this pedal keeps your tone's character intact while opening up a universe of creative possibilities.
Class-Leading Pitch Algorithms: The XS-1 uses cutting-edge BOSS technology to deliver pitch shifts so clean and natural, you'll forget you're using an effect. No warbling, no digital artifacts — just pure, musical pitch manipulation.
Massive Range: Go from +/- seven semitones for subtle shifts to a whopping +/- three octaves for dramatic transformations. Turn your guitar into a bass or send it into the stratosphere.
Smart Balance Control: Dial in the perfect mix between your dry signal and the shifted sound. Keep some of your original tone for fullness or go full-effect for maximum impact.
Playability That Keeps You in the Zone
The XS-1 isn't just about great sound — it's built for real-world performance where every millisecond matters and every note counts.
Instant Response: No lag, no hesitation. The XS-1 tracks your playing with lightning speed, keeping you locked in the groove whether you're laying down rhythm or blazing through solos.
Detune Magic: The subtle +/- 20 cent detune function creates lush doubling effects that make your single guitar sound like a full ensemble. Perfect for filling out your sound without overwhelming the mix.
Flexible Switching: Choose between toggle mode for set-and-forget operation or momentary mode for dramatic on-the-fly effects that punctuate your performance.
Professional Control and Connectivity
This pedal grows with your rig, offering expansion options that serious players demand.
External Footswitch Ready: Connect up to three external footswitches for instant access to your favorite tuning setups. Switch between different pitch combinations without breaking your performance flow.
Expression Pedal Control: Hook up an expression pedal for smooth, linear pitch control that responds to your foot movement. Create whammy-style pitch bends and swooping effects that bring new life to your solos.
Road-Tested Durability: Built to BOSS's legendary standards with their famous tank-like construction that survives countless gigs and studio sessions.
Your Gateway to Pitch-Perfect Creativity
The BOSS XS-1 Poly Shifter isn't just another effects pedal — it's a creative catalyst that expands your musical vocabulary. Whether you're a guitarist looking to add bass-like low-end, a bassist wanting to explore higher registers, or any musician ready to break sonic boundaries, this pedal delivers professional results with intuitive operation.
BOSS XS-1 Poly Shifter Features:
New BOSS algorithms for pristine pitch shifting quality
+/- Seven semitone or +/- Three octave range
Clear response that maintains fundamental sound character
Balance knob for effect/direct signal mixing
Detune function (+/- 20 cents) for rich doubling effects
Toggle or momentary pedal switch modes
External footswitch connectivity for up to three presets
Expression pedal input for linear pitch control
BOSS 5-year warranty
Compatible with guitar, bass, and other instruments
Warranty: BOSS Compact and Twin Pedals: 5 Years on Parts, 2 Years on Labor; BOSS (other): 1 Year on Parts, 90 Days on Labor
Boss XS-1 Poly Shifter Effects Pedal Specifications
Item #:
BOS XS1
Manufacturer Part Number:
XS-1
UPC:
761294519332
Product Specifications
AD Conversion: 24 bits + AF method
AF method (Adaptive Focus method) This is a proprietary method from Roland & BOSS that vastly improves the signal-to-noise (SN) ratio of the AD and DA converters.
DA Conversion: 32 bits
Sampling Frequency: 48 kHz
Nominal Input Level: -20 dBu
Maximum Input Level: +7 dBu
Input Impedance: 1 MΩ
Nominal Output Level: -20 dBu
Maximum Output Level: +7 dBu
Output Impedance: 1 kΩ
Recommended Load Impedance: 10 kΩ or greater
Bypass: Buffered bypass
Controls:
BALANCE knob
SHIFT knob
PEDAL MODE switch
SHIFT DIRECTION switch
Pedal switch
Indicator: CHECK indicator (Used for check battery)
Connectors:
INPUT jack: 1/4" phone type
OUTPUT jack: 1/4" phone type
CTL/EXP jack: 1/4" TRS phone type
DC IN jack
Power Supply:
AC adaptor
Alkaline battery (6LR61 or 6LF22, commercially available) x 1
Current Draw: 120 mA
Expected Battery Life Under Continuous Use: Alkaline battery (6LR61): Approximately 3 hours
* This can vary depending on the specifications of the batteries, capacity of the batteries, and the conditions of use.
Dimensions (W x D x H): 2-7/8" x 5-1/8" x 2-3/8" / 73 x 129 x 59 mm
Weight (including battery): 410 g / 15 oz
Accessories:
Leaflet (“USING THE UNIT SAFELY”, “IMPORTANT NOTES” and “Information”)
Alkaline battery (9 V, 6LR61 or 6LF22)
Options (sold separately):
AC adaptor: PSA series
Footswitch: FS-5U
Dual footswitch: FS-6, FS-7
Expression Pedal: EV-30, FV-500L, FV-500H, Roland EV-5
* 0 dBu = 0.775 Vrms
Boss XS-1 Poly Shifter Effects Pedal Specifications
Product Specifications
AD Conversion: 24 bits + AF method
AF method (Adaptive Focus method) This is a proprietary method from Roland & BOSS that vastly improves the signal-to-noise (SN) ratio of the AD and DA converters.
DA Conversion: 32 bits
Sampling Frequency: 48 kHz
Nominal Input Level: -20 dBu
Maximum Input Level: +7 dBu
Input Impedance: 1 MΩ
Nominal Output Level: -20 dBu
Maximum Output Level: +7 dBu
Output Impedance: 1 kΩ
Recommended Load Impedance: 10 kΩ or greater
Bypass: Buffered bypass
Controls:
BALANCE knob
SHIFT knob
PEDAL MODE switch
SHIFT DIRECTION switch
Pedal switch
Indicator: CHECK indicator (Used for check battery)
Connectors:
INPUT jack: 1/4" phone type
OUTPUT jack: 1/4" phone type
CTL/EXP jack: 1/4" TRS phone type
DC IN jack
Power Supply:
AC adaptor
Alkaline battery (6LR61 or 6LF22, commercially available) x 1
Current Draw: 120 mA
Expected Battery Life Under Continuous Use: Alkaline battery (6LR61): Approximately 3 hours
* This can vary depending on the specifications of the batteries, capacity of the batteries, and the conditions of use.
Dimensions (W x D x H): 2-7/8" x 5-1/8" x 2-3/8" / 73 x 129 x 59 mm
Weight (including battery): 410 g / 15 oz
Accessories:
Leaflet (“USING THE UNIT SAFELY”, “IMPORTANT NOTES” and “Information”)
Alkaline battery (9 V, 6LR61 or 6LF22)
Options (sold separately):
AC adaptor: PSA series
Footswitch: FS-5U
Dual footswitch: FS-6, FS-7
Expression Pedal: EV-30, FV-500L, FV-500H, Roland EV-5
* 0 dBu = 0.775 Vrms
Customer Reviews
4.8
Based on 11 reviews
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William T. 🇺🇸
Verified Buyer
Very intuitive operation. Tracking of
Very intuitive operation. Tracking of notes is great.
Published date
05/30/26
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0
Nizzledrizzle 🇺🇸
Really, really fun and functional
I went back and forth between the Digitech Drop, The Pitchfork and this for a few months. While this is my first time purchasing/using a pedal like this, I am pleased. The functionality, metal chassis and quality in general is just as implied. I will typically drop 1/2 from E, down to a full step, a...
Published date
11/26/25
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1
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Shane P. 🇺🇸
Verified Buyer
Works great
Does what its supposed to do works better than any other one i have ever tried. a must buy
Published date
10/26/25
Was this review helpful?
1
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J 🇺🇸
Verified Buyer
Awesome pedal!
I'm very happy with this pedal and I don't have to tune down my guitars ever gain!
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