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DI Boxes

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DI Boxes

A DI box is a device used in audio engineering that converts an asymmetrical audio signal into a symmetrical signal. The abbreviation DI stands for "Direct Injection". DI/ Balancing boxes are required when a signal source with an unbalanced output (usually coming from a jack or RCA plug) is to be connected to a device with a balanced input (usually via XLR plug). Typical examples of unbalanced signal sources are guitars with built-in pickups (electric guitars, electric basses or acoustic guitars) or keyboards. Common balanced inputs are found on mixing consoles or audio interfaces. Especially with long cable lengths, the balanced signal routing allows an effective reduction of interference signals.