Warm Audio WA-C1-MOD Mod Series Compact Chorus Vibrato Pedal

The WA-C1 Chorus Vibrato Mod is a pedalboard-friendly recreation of the most celebrated all-analog chorus in guitar pedal history with additional no-compromise features for exploring legendary modulated tones. The WA-C1 Mod starts with a premium, all-analog preamp known for being a favorite of guitar players who demand ultra-responsiveness, now fully bypassable to accommodate complex rigs. The lush chorus setting features separated depth and rate controls to expand beyond the limitations of vintage units while delivering true-to-original tone. The vibrato section is preserved as authentic to the original pedals, and an added hi-z switch on the back of the pedal allows players to compensate for higher impedance of guitars vs. keyboards to add clarity to the high end on guitars if desired.

Warm Audio WA-C1-MOD Mod Series Compact Chorus Vibrato Pedal Features:

The Definitive Analog Chorus - With Modern Mods:
- The WA-C1 Mod faithfully recreates the most celebrated all-analog chorus and vibrato circuit known for pure analog tones and rich modulation. The modified WA-C1 combines our celebrated circuit from the larger pedal, and adds the ability to bypass the preamp to work with setups that require meticulous gain-staging, all in a more compact, pedalboard-friendly enclosure. The 100% analog chorus pedal preserves the single input stage with wet/dry stereo output, and leverages top-mounted jacks with an ergonomic design to easily slot into any board.
No Emulation, Pure Analog Preamp:
- The WA-C1 Mod has a 100% analog preamp, matched to the renowned original, with level control that adds bite, depth, and even some natural compression to guitar tones. The WA-C1 Mod pedal preserves this preamp and also allows for quick bypassing by engaging “modern” mode over “vintage” to manage complex gain-staging in signal chains. The entire pedal circuit is supported internally with a dual DC-DC voltage converter to deliver robust power even when using an external 9V power supply.
Deep, Lush Chorus:
- The WA-C1 Mod delivers lush midrange depth and detail associated with proper Bucket Brigade Device analog chorus pedals. Leveraging a modern MN3007 BBD chip recreation with other premium components and boutique build quality, WA-C1 Mod is carefully clocked to match the depth and rate of the original pedal to reproduce the detail expected from the most sought after vintage pieces.
Rich, Three-Dimensional Vibrato:
- When it’s really time to wobble, engage the vibrato setting for added speed and bounce to your tone. Experimenting with the vibrato side yields rotary-like modulation tones perfect for funk, fusion, blues, jazz and more. WA-C1 Mod adds a flashing LED for effect monitoring on the face showing which setting is engaged along with the rate of the modulation.
Separate Depth & Rate Controls For Chorus:
- The WA-C1 Mod has separate depth and rate controls vs. the vintage “intensity” control. On vintage units, “intensity” increased only the rate as the depth was fixed, with the WA-C1 Mod, you can go beyond the limitations of vintage pedals by dialing in more subtle depth and variable rates for a larger palette of chorus tones.
Selectable Impedance For Multiple Sources:
- The WA-C1 Mod has selectable impedance on the back panel to select between the vintage input impedance of 50k ohm and a 1.1M Hi-Z setting better suited for passive string instruments to bring out clarity. This switch works in bypass mode to maintain clarity while the pedal is not in-use.
Hand-Tested In Austin, TX:
- Like all Warm Audio gear, the WA-C1 Mod has a 5-year warranty, and is meticulously hand-tested and inspected by trained technicians with a passion for making music in Austin, TX USA.

See all items from WARM AUDIO

Shop Similar Models

Warm Audio Pedals

About the Manufacturer

Phone: 512-348-6585

Warranty: 5 Year as of January 23, 2025. 1 Year previous.

Warm Audio WA-C1-MOD Mod Series Compact Chorus Vibrato Pedal Specifications

Warm Audio WA-C1-MOD Mod Series Compact Chorus Vibrato Pedal Specifications
Product Specifications	Controls: High/Low Input Sensitivity, Preamp Level, Chorus Depth & Rate, Vibrato Depth & Rate, Effect On/Off, Chorus/Vibrato Switch, Vintage/Modern Preamp Switch, Hi-Z On/Off. Power consumption: 800mW; 200mA at 9V With Vintage-Correct Internal Voltage Operation Via Dual DC-DC Voltage Converter Input sensitivity: 80mV /1 0mV Output level: 315mV Jacks: (1X) Input, (2X) Outputs Dimensions (W x L x H): 2.8" x 4.5" x 2.4" Weight: 1 lbs