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.
Control Elements and Connections
(1) + (2) 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.
(3) OUTPUT (XLR): This is the balanced mic-level output. Use a high-quality balanced microphone cable to establish
a connection.
(4) 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 the LIFT position, the ground connection is interrupted.
The SERIAL NUMBER of the DI400P is located at the bottom.
Connecting an Instrument Signal
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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