The Electro-Harmonix Pico Swello is an Electro-Harmonix wah pedal, currently around $144.94. Close alternatives include the Emma DiscomBOBulator and the Electro-Harmonix Q-Tron Plus. It pairs well with the 1959 Fender Tweed Deluxe and the Fender Bassman Combo Amp.
Electro-Harmonix Pico Swello
Electro-Harmonix · pedal
The Electro-Harmonix Pico Swello is a compact auto swell pedal that slows the volume envelope of your playing to create smooth volume swells, working polyphonically so chords as well as single notes swell fully. Beyond classic violin like swells, it can generate envelope filter and wah like textures, big synth style pads, and even act like a compressor to soften picking irregularities. With simple controls in a tiny enclosure, it delivers expressive, ambient swell effects effortlessly. It suits ambient, post rock, cinematic and pedal steel style players who want hands free polyphonic volume swells, pad textures and attack smoothing in a space saving pedal without manually working a volume pedal.
- swell
- compressor
- envelope
- synth
- ambient
- attack
- smooth
- envelope filter
Good for
- Busking
- Live
Price updated Aug 27, 2026
Genres the Electro-Harmonix Pico Swello is commonly used in
- Shoegaze
- Post-Rock
- Ambient
- Funk
cited
Inferred from shared tonal signals, not a stated genre tag. - Experimental
cited
Inferred from shared tonal signals, not a stated genre tag. - Soul
cited
Inferred from shared tonal signals, not a stated genre tag.
Amps that pair well with the Electro-Harmonix Pico Swello
Pedals that stack with the Electro-Harmonix Pico Swello
Nobels ODR-1
Nobels
8% matchNobels ODR-1 leans toward full, and that's a real, usable character to pair with
Paul Cochrane Timmy
Paul Cochrane
8% matchWhat Paul Cochrane Timmy brings here leans toward transparent — that's worth building a pairing around
Caroline Guitar Company Meteore
Caroline Guitar Company
6% matchRun Caroline Guitar Company Meteore after Electro-Harmonix Pico Swello in the signal chain, clear of Electro-Harmonix Pico Swello's own gain stage — goes in the amp's FX loop (or last, into a clean amp)
Dunlop - MXR Carbon Copy Deluxe Analog Delay
Dunlop
6% matchRun Dunlop - MXR Carbon Copy Deluxe Analog Delay after Electro-Harmonix Pico Swello in the signal chain, clear of Electro-Harmonix Pico Swello's own gain stage — goes in the amp's FX loop (or last, into a clean amp)
Cheaper alternatives
Dunlop Cry Baby
Dunlop
67% similarityShared character: wah, attack
Electro-Harmonix Nano BassBalls
Electro-Harmonix
62% similarityShared character: single_rig, wah, attack
Maestro Agena
Maestro
93% similaritysimilar tone character
Electro-Harmonix XO Micro Q-Tron
Electro-Harmonix
93% similaritysimilar tone character
Electro-Harmonix Micro Q-Tron Envelope Filter
Electro-Harmonix
93% similaritysimilar tone character
Boutique & premium upgrades
Similar charactersee all similar tone character →
Emma DiscomBOBulator
pedal
73% similarityShared character: controls, each_note, mono_synth
Electro-Harmonix Q-Tron Plus
Electro-Harmonix
67% similarityShared character: mono_synth, wah
Tycobrahe Parapedal Wah
Tycobrahe
65% similarityShared character: mono_synth, wah
Guyatone Wah Rocker WR3
pedal
63% similarityShared character: mono_synth, wah, attack
Musitronics Mu-Tron III
Musitronics
62% similaritySimilar voicing: ambient, smooth
Keeley Neutrino V2
Keeley
94% similaritysimilar tone character
See all alternatives to the Electro-Harmonix Pico Swello (cheaper + boutique) →
Questions people ask
What are good alternatives to the Electro-Harmonix Pico Swello?+
The closest matches in character are the Emma DiscomBOBulator, the Electro-Harmonix Q-Tron Plus, the Tycobrahe Parapedal Wah. Budget picks: Dunlop Cry Baby, Electro-Harmonix Nano BassBalls, Maestro Agena. Boutique upgrades: Maxon AF-9 Auto Filter, Pigtronix Resotron Analog Tracking Filter, Ashdown Type 23 Three Band Filter.
What pairs well with the Electro-Harmonix Pico Swello?+
Strong matches from rig and tone-complementarity evidence: 1959 Fender Tweed Deluxe, Fender Bassman Combo Amp, Nobels ODR-1 — 1959 Fender Tweed Deluxe leans toward mid-forward, and that's a real, usable character to pair with.
How much does the Electro-Harmonix Pico Swello cost?+
Around $144.94 (live listing price, updated Aug 27, 2026).