Passive DI Box

The Passive DI Box is a professional audio interface designed to connect unbalanced, high-impedance signals from musical instruments to the balanced, low-impedance inputs found on mixing consoles and PA systems. Its passive circuitry ensures a pure, uncoloured signal path, making it an essential tool for live sound engineers and recording studios alike.

Featuring a robust metal housing, this DI box is built to withstand the rigours of touring and regular use. A key function is the ability to link the signal simultaneously to both the mixing console and the instrument's own amplifier, providing monitoring flexibility for the musician on stage. This 'thru' or link output maintains signal integrity without degradation.

Key Features & Controls

The unit is equipped with a comprehensive set of controls to handle various signal levels and eliminate unwanted noise. An attenuation switch offers three settings (0dB, -20dB, -40dB) to prevent input clipping from high-output instruments like active basses or keyboards. A ground lift switch effectively breaks ground loops that can cause hum and buzz, ensuring a clean audio signal.

Technical Specifications

The input impedance of 50kΩ is optimised for passive guitar and bass pickups, preventing any unwanted loading of the instrument's signal. The output provides a balanced, low-impedance 600Ω signal via XLR, perfect for running long cable lengths to the mixing desk without noise interference. This combination of features makes it a versatile and reliable solution for a wide range of audio applications.