Electro-Harmonix Worm Analogue Wah/Phaser/Vibrato/Tremolo Effects Pedal - WORM

The Electro-Harmonix Worm is an all-analog multi-functional modulation effects processor featuring...

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Product Information

Full details

This guide is for guitarists and bassists seeking versatile, analog modulation effects. The Electro-Harmonix Worm offers a unique combination of Phaser, Tremolo, Vibrato, and a Neo-modulated Wah in a single, robust unit, providing a wide palette of sonic textures. A potential caveat is its specific power requirement, which needs careful attention.

All features

Model Part NumberWORM
BrandElectro-Harmonix

Extended Product Information

FAQs

What are the four main effects modes on the Electro-Harmonix Worm?

The four modes are Phaser, Tremolo, Vibrato, and a Neo-modulated Wah.

Can I use my standard 9V guitar pedal power supply with the Worm?

No, the Electro-Harmonix Worm requires a specific 24VDC, 100mA power supply, which is included with the pedal. Using a standard 9V supply will not work and could potentially damage the unit.

What does 'Neo-modulated Wah' mean?

This mode uses the pedal's internal Low-Frequency Oscillator (LFO) to sweep a filter, similar to a wah pedal, but controlled by the LFO speed and depth, rather than a foot treadle.

Can I control the effect sweep with my foot?

Yes, the Worm has an expression pedal input that allows you to control the effect's sweep manually with an optional expression pedal.

Is the Electro-Harmonix Worm a digital or analog pedal?

The Electro-Harmonix Worm is an all-analog effects processor.

What is True Bypass?

True Bypass means that when the pedal is switched off, it completely removes itself from your signal path, ensuring your pure instrument tone is unaffected.

How do I clean the pedal?

You can clean the exterior of the pedal with a dry or slightly damp cloth. Avoid using solvents or harsh cleaning agents.

Troubleshooting

No sound when pedal is engaged

Check all cable connections. Ensure the power adapter is correctly connected and the unit is receiving power. Verify the correct input and output jacks are used. Test with a different instrument cable.

Effect does not activate or sound is distorted

Confirm you are using the correct 24VDC power supply. Ensure the MODE knob is set to a valid effect. Check that the SPEED and DEPTH controls are not set to minimum, which could result in no audible effect. Test the pedal in True Bypass mode to isolate the issue.

Expression pedal not controlling effect sweep

Ensure the expression pedal is securely plugged into the correct jack. Verify the expression pedal is functioning correctly by testing it with another compatible device. Make sure the pedal is in a mode that is affected by the expression pedal input.

Pedal makes unwanted noise or hum

Ensure all audio cables are properly shielded. Try a different power outlet to rule out power line noise. If using multiple pedals, consider a dedicated isolated power supply for the Worm.

Pros and Cons

Pros

  • Multi-effect functionality reduces pedalboard clutter.
  • Pure analog signal path for authentic vintage tone.
  • Manual sweep mode offers unique creative possibilities.
  • Expression pedal input adds advanced control.
  • Durable construction suitable for gigging musicians.

Cons

  • Requires a specific 24VDC power supply (included), not standard 9V.
  • Limited sound shaping options compared to digital multi-effects units.
  • Mode switching can be abrupt for some real-time applications.
  • Finding a specific 'sweet spot' for each effect may require practice.

Setup, Compatibility & Care

Setup:

  1. Connect your instrument to the INPUT jack and your amplifier to the OUTPUT jack using standard 1/4-inch instrument cables.
  2. Connect the included 24VDC power adapter to the power input jack on the pedal and plug it into a suitable power outlet.
  3. Select your desired modulation mode using the MODE knob.
  4. Adjust the SPEED and DEPTH knobs to shape your effect.
  5. For manual control, use the expression pedal input (optional).

Compatibility:

  • Audio: Mono input and output, suitable for most electric guitars, bass guitars, and keyboards.
  • Power: Requires a specific 24VDC, 100mA center-negative power supply (included). Using incorrect power supplies can damage the unit.
  • Expression Pedal: Compatible with standard expression pedals (TRS connector recommended for full sweep control).

Care:

  • Keep the pedal away from moisture and extreme temperatures.
  • Clean the exterior with a dry or slightly damp cloth; avoid solvents.
  • Ensure cables are securely connected to prevent wear on jacks.
  • Store in a safe place when not in use to protect the chassis and controls.

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