UNiKA DI-BOX
User Guide
4
Fig-3: ¼"TS Unbalanced connection
Fig-4: ¼"TRS Balanced connection
Tip-Signal (+)
Sleeve-Ground
Tip-Signal Hot (+)
Ring-Signal Cold(-)
Sleeve-Ground
INPUT PAD ATTENUATION
The most common use of the direct input is with guitar pick-ups or keyboards. The optimal
setting for this is most likely with the pad switch set to 0dB, although with some high-output
pick-ups the performance of the direct input may be improved if the pad switch is set to
-20dB to prevent possible clipping of the input signal.
The instrument is connected to the XLR-1/4" Combo jack socket, and a parallel link feed
taken from the other jack socket to the instrument’s own amplifier.
The direct input can also be fed either from a line-level output from the head ( pad set to
-20dB) or from the amplifier power output (speaker output, pad set to -40dB).
ELIMINATING HUM AND BUZZ AND THE GROUND LOOP
The DI-BOX is equipped with output 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.
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.
Summary of Contents for Di-Box
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