The Behringer Ultra-DI DI400P is a highly affordable, compact passive direct injection box designed to seamlessly connect guitars, basses, or keyboards directly to audio mixers and PA systems. Equipped with a high-performance Behringer OT-2 transformer, it converts unbalanced instrument signals into a balanced XLR output, ensuring an ultra-flat frequency response over long cable runs without losing high-frequency detail. The unit features parallel 1/4" inputs and outputs to split your signal to an onstage amplifier simultaneously, alongside a dedicated Ground Lift switch to instantly eliminate irritating ground loop hum. [1] (), [2] ()