UNiKA DI-BT
User Guide
6
Eliminating hum and buzz
The Unika DI-BT Box is equipped with isolation transformers to eliminate hum
and buzz caused by stray DC voltage and ground loops.
Computers, optical projectors and other consumer equipment can be
particularly noisy, anyone that has incorporated audio with a projector knows
that noise can be a serious problem, so transformers can be incredibly useful
when combating system noise.
A ground lift switch on the outputs takes this one step further by lifting pin-
1 on the XLRs. Computers are often the source for noise problems in audio
systems, so greater care is certainly needed to keep things quiet.
Using the headphone output
The DI-BT Box is also equipped with a stereo headphone output. This
headphone amplifier is controlled by the master output level control, and is
designed to be used to check signal before plugging into a PA system.
Adjusting the level control on the DI-BT Box will affect both the XLR and the
headphone output.
The 3.5mm (1/8") output is designed for both ear buds and standard TRS
stereo headphones where tip-left, ring-right and the sleeve is ground.
Be careful! If you push the level too hard it may distort or cause hearing
damage! The DI-BT Box is intended for use by professional audio
engineers who are aware of the importance of listening at safe levels.
This same audio level control sets the output going to your PA or recording
system. Once you have determined that the signal from the computer is OK,
reset the level to 7 o'clock. Plug the XLR outputs to your audio system using
standard balanced mic cables. Turn on the audio system, bring up the level
and then turn up the level on the DI-BT Box.
Summary of Contents for DI-BT
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