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A3 Stompbox

A3 Stompbox creates boutique pedals and custom tone tools for players who want premium feel, smooth control and hand-built character. Based in South Korea, A3 Stompbox is especially known for custom volume and expression pedals, along with analogue effects and pedalboard solutions designed for serious guitarists and bassists.

Whether you are looking for a smooth volume pedal, precise expression control, a custom pedalboard-friendly utility pedal or expressive analogue tones, A3 Stompbox focuses on practical performance, quality components and player-focused design. Their pedals are built for musicians who care about feel, reliability and how each part of the rig responds under the foot.

Explore our A3 Stompbox collection at Gsus4 and find boutique pedals, expression pedals and custom control solutions designed to give your rig a more refined, professional playing experience.

A3 Stompbox - Gsus4
A3 Stompbox | Quad Cortex Duel Expression Pedal | Expression w/ Toe Switch (A3 - CortEXP) - Gsus4
A3 Stompbox | Quad Cortex Duel Expression Pedal | Expression w/ Toe Switch (A3 - CortEXP) - Gsus4
$489.00
$489.00 - $489.00
$489.00
$449.00
$449.00 - $449.00
$449.00

A3 Stompbox Quad Cortex Dual Expression Pedal Expression w/ Toe Switch Medium

A3 Stompbox

The Ultimate DUAL EXPRESSION For Your Modellers Like Quad Cortex, Helix & Kemper Expression Output 1: Smooth Throw Expression Pedal The ...

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$489.00
$489.00 - $489.00
$489.00
$449.00
$449.00 - $449.00
$449.00
A3 Stompbox | The Custom Volume Pedal (250k, Passive) | Mini (A3 - Vol - Mini - SIDEMOUNT) - Gsus4
A3 Stompbox | The Custom Volume Pedal (250k, Passive) | Mini (A3 - Vol - Mini - SIDEMOUNT) - Gsus4
$489.00
$489.00 - $489.00
$489.00
$399.00
$399.00 - $399.00
$399.00

A3 Stompbox The Custom Volume Pedal (250k, Passive) Mini

A3 Stompbox

"The best volume pedal ever with the perfect throw and curve."- Michael Thompson"This is great."- Melvin Davis"So smooth"- Nigel Hendroff"FI...

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$489.00
$489.00 - $489.00
$489.00
$399.00
$399.00 - $399.00
$399.00
A3 Stompbox | The Custom Volume Pedal (250k, Passive) | Standard - Gsus4
A3 Stompbox | The Custom Volume Pedal (250k, Passive) | Standard - Gsus4
$519.00
$519.00 - $519.00
$519.00
$429.00
$429.00 - $429.00
$429.00

A3 Stompbox The Custom Volume Pedal (250k, Passive) Standard

A3 Stompbox

"The best volume pedal ever with the perfect throw and curve."- Michael Thompson"This is great."- Melvin Davis"So smooth"- Nigel Hendroff"FINALL...

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$519.00
$519.00 - $519.00
$519.00
$429.00
$429.00 - $429.00
$429.00
A3 Stompbox | The Custom Expression Pedal | Stainless | Mini (A3 - EXP - Mini - silver) - Gsus4
A3 Stompbox | The Custom Expression Pedal | Stainless | Mini (A3 - EXP - Mini - silver) - Gsus4
$489.00
$489.00 - $489.00
$489.00
$399.00
$399.00 - $399.00
$399.00

A3 Stompbox The Custom Expression Pedal Stainless Mini

A3 Stompbox

"The best volume pedal ever with the perfect throw and curve."- Michael Thompson"This is great."- Melvin Davis"So smooth"- Nigel Hendroff"FI...

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$489.00
$489.00 - $489.00
$489.00
$399.00
$399.00 - $399.00
$399.00
A3 Stompbox | Quad Cortex Duel Expression Pedal | Expression w/ Toe Switch (A3 - CortEXP) - Gsus4
A3 Stompbox | Quad Cortex Duel Expression Pedal | Expression w/ Toe Switch (A3 - CortEXP) - Gsus4
$489.00
$489.00 - $489.00
$489.00
$449.00
$449.00 - $449.00
$449.00

A3 Stompbox Quad Cortex Dual Expression Pedal Expression w/ Toe Switch Mini

A3 Stompbox

The Ultimate DUAL EXPRESSION For Your Modellers Like Quad Cortex, Helix & Kemper Expression Output 1: Smooth Throw Expression Pedal The ...

View full details
$489.00
$489.00 - $489.00
$489.00
$449.00
$449.00 - $449.00
$449.00
A3 Stompbox | The Custom Volume Pedal (250k, Passive) | X - Mini () - Gsus4
A3 Stompbox | The Custom Volume Pedal (250k, Passive) | X - Mini () - Gsus4
$489.00
$489.00 - $489.00
$489.00
$399.00
$399.00 - $399.00
$399.00

A3 Stompbox The Custom Volume Pedal (250k, Passive) X-Mini

A3 Stompbox

  "The best volume pedal ever with the perfect throw and curve."- Michael Thompson"This is great."- Melvin Davis"So smooth"- Nigel Hendroff"F...

View full details
$489.00
$489.00 - $489.00
$489.00
$399.00
$399.00 - $399.00
$399.00