DI Boxes

DI Boxes at Maplin

What is a DI Box?

A DI box (short for Direct Injection box) is an essential audio tool used in live sound, studio recording, and broadcasting. It converts high-impedance, unbalanced signals—typically from instruments like electric guitars, basses, or keyboards—into low-impedance, balanced signals suitable for mixing consoles or audio interfaces.

Using a DI box helps eliminate noise, hum, and signal loss, especially over long cable runs. It also ensures better sound quality and compatibility with XLR inputs on professional audio equipment.

Whether you’re setting up for a live gig or a studio session, choosing the best DI box depends on your signal source, budget, and the level of audio clarity you need.

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FAQ

What does a DI box do?

A DI box (Direct Injection box) converts high-impedance, unbalanced signals from instruments like guitars, basses, and keyboards into low-impedance, balanced signals, making them suitable for connection to mixing consoles or audio interfaces.

What’s the difference between a passive and active DI box?

Passive DI boxes: Don’t require a power source and are best for high-output, active instruments.

Active DI boxes: Require a power source (either a battery or phantom power) and are ideal for low-output, passive instruments like vintage guitars or basses.

Why do I need a DI box?


A DI box helps improve audio quality by reducing noise, hum, and signal loss, especially over long cable runs. It ensures your instrument signal is clear and free from interference when plugged into professional audio equipment.

How do I connect a DI box to my setup?

To use a DI box, connect your instrument (e.g., guitar or keyboard) to the input of the DI box. Then, connect the XLR output of the DI box to a mixer, audio interface, or PA system. If you're using an active DI box, make sure it’s powered (via battery or phantom power).