Electro Harmonix Pico Swello

Effect Pedal for Electric Guitar

Changes the attack of the guitar to achieve a soft and flowing sound even when playing fast runs and arpeggios
A stronger effect produces dramatic swells in volume, which are perfect for ambient soundscapes and synth pads.
Compacy pico housing
Controls: Vol, Attck, Freq, Mod
Push button: Filter
LED: Effect on
Footswitch: Effect bypass
Input: 6.3 mm jack
Output: 6.3 mm jack
Power adapter connection: Barrel connector 5.5 x 2.1 mm, centre negative
Power supply with a 9 V DC mains adapter (included)
Dimensions: (W x D x H): 51 x 93 x 51 mm
Weight: 544 g

Note: Battery operation is not supported.

30-Day Money-Back Guarantee

3-Year Thomann Warranty

Available since October 2025
Item number 626652
Sales Unit 1 piece(s)
Effect Types Auto Swell

138 €

All prices incl. VAT

Sales Rank

in Miscellaneous Guitar Effects

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2 Customer ratings

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5 / 5

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1 Review

Ouitstanding attack 'removal' pedal

Nadim Bakhshov 04.11.2025

The Pico Swello replaces my old EX Attack Delay, and it’s a major improvement. The polyphonic mode on the Attack Delay always left artefacts and slightly altered the tone — sometimes adding a metallic edge that became distracting. The Pico Swello has none of these issues. It tracks cleanly and responds quickly, so even fast guitar passages are smoothed without glitching. The effect is genuinely impressive: it can turn your guitar into something that feels almost like a bowed instrument, giving you violin-like swells or a fluid, steel-string texture with ease

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Effect Pedal for Electric Guitar

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Electro Harmonix Pico Swello

Effect Pedal for Electric Guitar

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