Open Box - Electro-Harmonix Pico Swello Attack Envelope

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Condition

This unit is in Open Box - Mint condition with all original packaging. This was a lightly used shop demo pedal. Fully tested and covered by the full manufacturer’s warranty.

Professor’s Notes

The Pico Swellō gives you classic volume swell effects in a compact, modern enclosure, making it a clever, all-analog-style solution for players chasing bowed, pad-like textures without relying on a volume pedal.

Description

The Electro-Harmonix Pico Swellō Attack Envelope is a compact dynamics pedal designed to recreate the sound of volume swell effects automatically. By fading in the attack of your notes, it transforms your guitar or bass into something closer to strings, synth pads, or ambient textures.

The pedal’s controls are intuitive and powerful:

• Attack adjusts how quickly the swell comes in, from sharp to gradual.
• Depth sets the intensity of the effect.
• Mode switch offers Normal and Sensitivity modes for different playing styles.

Where traditional volume pedals require footwork and precision, the Pico Swellō automates the process with consistent results in a pedalboard-friendly footprint. It’s perfect for players exploring ambient music, post-rock, shoegaze, or experimental textures, but it’s also subtle enough for adding expressive dynamics in more traditional contexts.

With true bypass switching, rugged construction, and standard 9V operation, the Pico Swellō delivers professional performance while taking up minimal space.

Specifications

• Type: Auto-swell / attack envelope pedal
• Controls: Attack, Depth, Mode switch
• Bypass: True Bypass
• Audio: Mono input/output
• Power: 9VDC-200mA power supply included
• Current Draw: ~100mA
• Dimensions: 3.65" x 1.75" x 1.5" (Pico Series compact enclosure)

What’s Included

• Electro-Harmonix Pico Swellō Attack Envelope pedal
• 9VDC-200mA power supply
• Original packaging