Earthquaker A/B BOX
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Essential Information About the EarthQuaker Devices A/B Box Pedal
Essential Information About the EarthQuaker Devices A/B Box Pedal
- Passive A/B Selector : instantly switch between two signal paths without power or active electronics.
- Highly versatile : 1 input to 2 outputs or 2 inputs to 1 output, usable in both directions depending on your setup.
- Indispensable routing tool for pedalboards: amp switching, instrument selection, tuner output, mute function, or setting up a "dry/wet" path.
- Preserves tone : no circuitry between input and outputs, for a simple and direct signal approach.
Manufacturer Information
Earthquaker
https://www.earthquakerdevices.com
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A Pedalboard Classic: The A/B Switch, EarthQuaker Devices Version
A/B boxes are among the oldest and most useful tools in the guitar and bass world: they don't create effects but make your setup more flexible and quicker to manage. With the A/B Box, EarthQuaker Devices offers a deliberately minimalist version focused on the essentials: passively selecting an input or output without intentional coloration or superfluous features. In a range often associated with creative pedals, this A/B Box stands as the Swiss Army knife that simplifies life on stage and in the studio.
Who Is This A/B Box For, and In What Uses Does It Make a Difference?
This A/B Box is aimed at all musicians, from beginners who want a clear setup to session guitarists who constantly change configurations. It is ideal if you play rock, blues, pop, indie, metal, or ambient : whenever you need to route a signal quickly, it becomes essential.
On stage, it allows switching from one amp to another (for example, a clean combo and a more saturated head), or toggling between two effects chains. In rehearsal, it facilitates comparing two instruments without adjusting settings. In the studio, it helps organize a "dry" path and a "wet" path to record a clean take alongside a processed signal, or to switch a source to two different destinations as needed.
Technical specifications
| Effects | Selector | Type | sector |
| Technology | Analog | Use | electric guitar |
| Format | Pedal | Color | Black |
Questions frequently asked
Does the EarthQuaker A/B Box require a power supply?
Its passive design shows a consumption of 0 mA and does not require any power supply.
Can two instruments be connected to the same effects chain?
The wiring can be used in a 2-input to 1-output configuration to select one of two sources. This function notably allows switching between two instruments to the same effects chain.
How to switch between two amplifiers with this pedal?
In a 1-input to 2-outputs configuration, the signal is routed to output A or output B. The pedal allows selecting one of the two connected amps. Both outputs are not meant to be used simultaneously: this is an A/B switch.
Does the A/B Box alter the guitar's tone?
The passive architecture contains no buffer, preamp, or conversion to avoid adding any intentional coloration. However, cable length and the impedances of connected devices can influence the signal behavior.
Can this A/B switch be used with a tuner?
One output can be dedicated to a tuner to route the signal as needed. The selector can also serve as a mute during an instrument change.



