BEHRINGER ULTRA-DI DI400P

Thank you for showing confidence in BEHRINGER products by purchasing the ULTRA-DI DI400P. The DI400P is a high-performance passive direct injection box.

+Please read the safety instructions that appear at the end of this document.

Being on stage or in the studio, musicians often look for ways to connect certain signal sources directly to the mixing console. Even though this approach has obvious advantages, there are still some technical hurdles obstructing its implementation. For example, keyboards seldom feature balanced outputs, and guitars can not be directly connected to mixing consoles because of the high impedance of guitar signals.

The DI400P lets you directly tap into a high-impedance, unbalanced signal—for example, the signal between a guitar and a guitar amp. From there on, you can feed the signal directly to a mixing console.

1. CONTROL ELEMENTS AND CONNECTIONS

Fig. 1: Top view

+ PARALLEL IN/OUT (¼" TS): These connectors are used for connecting unbalanced signal sources. Because both connectors are wired in parallel, they can be used both as an input and as a direct output to loop the signal through to a monitor amplifier.

OUTPUT (XLR): This is the balanced mic-level output. Use a high-quality balanced microphone cable to establish connection.

Using the GND LIFT (ground lift) switch, you can fully separate input and output grounding. Depending on how the equipment to which your DI400P is connected is grounded, using the GND LIFT switch lets you lower hum noise or ground loops. When the GND LIFT switch is in LIFT position, the ground connection is interrupted.

The SERIAL NUMBER of the DI400P is located at the bottom.

2. CONNECTING AN INSTRUMENT SIGNAL

Fig. 2: Guitar ß DI-box ß guitar amp/mixer

This illustration shows the application of a DI-box. The signal feeding the amplifier remains unchanged; it is simply taken and routed into the amp. The low-impedance balanced signal is forwarded to the mic input of the mixing console. This application has its advantages particularly with bass guitars, because very few microphones can linearly transmit bass frequencies with high signal levels. If you are using effects, insert the DI400P after the effects device, so that you can monitor the effects via the PA system or the recording as well.

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Behringer manual Behringer ULTRA-DI DI400P, Control Elements and Connections, Connecting AN Instrument Signal
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DI400P specifications

The Behringer DI400P is a compact yet highly effective direct injection (DI) box designed to enhance audio signal integrity for live performances and studio recordings. As a reliable tool for musicians and audio engineers, the DI400P offers a range of features that cater to various applications, from keyboards and electric guitars to electronic devices and microphones.

One of the standout characteristics of the DI400P is its passive design, allowing it to handle high sound pressure levels without introducing unwanted distortion. This feature makes it an ideal choice for capturing the true essence of an instrument's sound while maintaining a clean and transparent audio signal.

The DI400P is equipped with a balanced XLR output, which helps ensure that the signal remains strong and free from interference over long cable runs. Additionally, it includes a ΒΌ-inch TRS input for connecting unbalanced signals, providing versatility for different audio sources. The device is specifically designed to convert high-impedance, unbalanced signals into low-impedance, balanced outputs, making it easier to integrate with professional audio gear.

Another significant feature of the DI400P is its ground lift switch, which allows users to eliminate unwanted ground loops. This feature is crucial for avoiding hum and noise, ensuring a cleaner signal path during performances or recordings. The rugged metal housing of the DI400P ensures durability on stage or in the studio, protecting the internal circuitry from physical damage.

Furthermore, the DI400P boasts a frequency response of 10 Hz to 30 kHz, allowing it to handle a wide range of audio frequencies, making it suitable for both low-end bass instruments and high-frequency sound sources. Its compact design enhances portability, allowing musicians to carry it easily in their gear bags.

The Behringer DI400P is an affordable yet reliable solution for anyone needing to connect instruments to a sound system or recording interface. With its combination of passive operation, ground lift feature, and solid construction, the DI400P stands as a valuable asset in any audio setup, improving sound quality and reliability. Whether used in live performances or studio settings, the DI400P delivers exceptional performance, making it a preferred choice among audio professionals.
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