Walrus Audio Xero Polylooper Guitar Effects Pedal – Black

Copy. Layer. Repeat. – The Walrus Audio Xero Polylooper Guitar Effects Pedal in Black

The Xero Polylooper (pronounced zee-roh) gives you the freedom to build, shape, and control your loops without slowing down your flow. Each channel handles multiple overdubs with independent volume, pan, speed (½×, 1×, 2×), and reverse playback. Three loop modes (Sync, Unsynced, and Polyrhythmic) let you tailor your looping style, whether you’re keeping things aligned, going freeform, or creating interlocking polyrhythms.

• Dual-channel looping – independent control of two layers
• Three loop modes
• Sync: Keep all loops in time. Traditional looping style
• Unsynced: Channels are independent, each with its own loop length. Great for soundscapes and ambient playing
• Polyrhythmic: Loops lock to a shared pulse but can be different lengths, allowing for polyrhythms or short loops repeating over longer ones
• Flexible playback – volume, pan, playback speed (½×, 1×, 2×), and reverse
• Hands-free control – intuitive stomp gestures, no menu diving
• Expandable – external dual footswitch, MIDI IN/THRU (1/8″), and USB-C firmware updates

Two stomp switches make it super easy to record, stop, switch channels, or clear a loop. No clunky menus or deep diving! Want quicker access? Just plug in an external dual footswitch. Xero also includes 1/8″ MIDI IN and THRU for syncing with other gear, and USB-C making it future-proof. Available in black or cream.

Two Loop Channels, Fully Independent Control

• Loop up to 3 minutes with near infinite stacking of loops
• Unlimited overdubs
• Volume and Pan controls
• Playback speed (0.5x / 1x / 2x)
• Reverse playback option

Speed FX & Direction Controls

• Half / Normal / Double speed
• Reverse playback – Each channel’s playback behavior can be manipulated independently, letting you remix on the fly.
• FX activation syncs to loop start in Sync and Poly modes, ensuring accurate timing

Stereo. MIDI. USB. Ready to Integrate

• 1/8” MIDI IN/THRU (Type A) for clock sync and remote control
• USB-C for easy firmware updates via walrusaudio.io
• Stereo in/out with full panning control on each channel
• Compatible with Chrome on Mac or Windows for web-based updates

Breakdown of Control Layout

Channel 1

• Pan 1: Stereo balance for loop playback
• Vol 1: Channel output volume with +3dB of headroom
• Speed: 0.5x / 1x / 2x playback speed (when Speed FX is active)
• Direction: Forward or reverse loop playback

Channel 2

• Pan 2: Independent stereo placement
• Vol 2: Channel 2 volume with +3dB boost
• Speed: 0.5x / 1x / 2x playback
• Direction: Forward or reverse loop playback

MIDI Intergration

• Accepts 1/8” TRS MIDI IN (Type A)
• Sends MIDI THRU to downstream devices
• Supports full MIDI CC control for looping, playback, speed FX, and more

SPECIFICATIONS

• 9V DC, 300mA minimum
• Center Negative, 2.1mm center pin, 5.5mm barrel
• Enclosure dimensions: 4.6” x 3.9” x 2.3” (including jacks)
• Input Impedance: 1.1MΩ
• Output Impedance: 1kΩ
• Signal-to-Noise Ratio (Engaged): 86dB
• Signal-to-Noise Ratio (Bypassed): 110dB
• Noise Floor (Engaged): -93dBu
• Noise Floor (Bypassed): -116dBu
• Headroom (Engaged): 5.2Vpp / +7.5dBu @ 1kHz < 1% THD+N

Manufacturer: Walrus Audio
Model: 900-1097BK
SKU: I843659-N-2-WHXA

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Since 1958, Chuck Levin’s Washington Music Center has been the trusted destination for musicians and audio professionals across Maryland, Virginia, and Washington, D.C. Family-owned and operated, our legendary music store delivers Everything in Music®—from instruments and recording gear to pro audio, rentals, and repair services.

Our team of musicians and industry experts lives and breathes gear, helping you build the perfect setup for your next performance, studio session, or installation. As an authorized dealer for top brands, we also offer our award-winning CHUCKSCLUSIVE line—exclusive, limited-edition instruments and collaborations recognized with the NAMM Top 100 Dealer Innovation Award for redefining what a music retail experience can be.

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