Mackie BIGK NOB Operation Manual Download Page 10

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BIG KNOB

BIG KNOB

2-TRACK A Level Switch

This two-position switch sets the input level of the
2-TRACK A inputs to 4 dB (balanced input)
or –10 dB (unbalanced input). Use the +4 dB setting
for professional equipment operating at the +4 dBu
standard, and use the –10 dB setting for consumer
equipment operating at the –10 dBV standard.

2-TRACK A Trim Control

This control adjusts the input sensitivity of the
incoming 2-TRACK A signal by ±10 dB (unity at
center detent). This allows for precise level matching
between the various incoming 2-track sources, which
often do not have output level controls of their own.

2-TRACK B Inputs

These stereo 1/4-inch balanced/unbalanced inputs
are fed by the outputs of the second external 2-track
recorder. If a mono signal is plugged into the LEFT
input only, it is automatically routed to both LEFT
and RIGHT inputs.

2-TRACK B Level Switch

This two-position switch sets the input level of the
2-TRACK B inputs to 4 dB (balanced input)
or –10 dB (unbalanced input). Use the +4 dB setting
for professional equipment operating at the +4 dBu
standard, and use the –10 dB setting for consumer
equipment operating at the –10 dBV standard.

2-TRACK B Trim Control

This control adjusts the input sensitivity of the
incoming 2-TRACK B signal by ±10 dB (unity at
center detent). This allows for precise level matching
between the various incoming 2-track sources, which
often do not have output level controls of their own.

DAW MIX

These stereo 1/4-inch balanced/unbalanced in-
puts are fed by the master mix output of the DAW,
usually the DAW outputs 1-2. If a mono signal is
plugged into the LEFT input only, it is automatically
routed to both LEFT and RIGHT inputs.

DAW MIX Level Switch

This two-position switch sets the input level of the
DAW MIX inputs to 4 dB (balanced input) or
–10 dB (unbalanced input). Use the +4 dB setting

for professional equipment operating at the +4 dBu
standard, and use the –10 dB setting for consumer
equipment operating at the –10 dBV standard.

DAW MIX Trim Control

This control adjusts the input sensitivity of the
incoming DAW MIX signal by ±10 dB (unity at center
detent). This allows you to precisely fi ne tune the
incoming level of the DAW MIX input so it matches
the signal level of other incoming 2-track sources.

PHONO

These stereo RCA unbalanced inputs are fed by the
outputs of a turntable with a moving-magnet cartridge
(MM). These inputs have a built-in precision RIAA
preamplifi er that provides the equalization and gain
required for a phono-level signal to return it to a
proper line-level signal.

This allows you to playback vinyl records and dub
them to a 2-track recorder, as well as send the
phono signal to the input of the DAW for archiving/
restoration/CD burning.

Note:

Two RCA shorting plugs are provided, which

should be plugged into the PHONO inputs when they
are not being used. This terminates the inputs and
reduces the noise fl oor should you accidentally push
in the PHONO INPUT SOURCE SELECT button.

PHONO Trim Control

This trim control adjusts the input sensitivity of
the incoming PHONO signal by ±10 dB. This allows
you to precisely fi ne tune the incoming level of the
PHONO input so it matches the signal level of other
incoming 2-track sources.

The PHONO input does not need a +4/–10 level
switch since a phonograph is always at a consumer
signal level, unlike tape decks and soundcards,
which could be –10 or +4, depending on the model.

PHONO Grounding Lug (GND)

This small grounding lug allows you to connect the
grounding wire from an attached turntable. This
prevents ground loops and hum from showing up in
the phono source’s audio signal.

DAW PHONES MIX INPUT

These stereo 1/4-inch balanced/unbalanced inputs
allow connection of a second stereo mix from the
DAW for a custom headphone mix.

POWER

~100-240 VAC
50/60 Hz 25W

AC SELECT

220-240V

100-120V

BAL/UNBAL

MONITOR

2-TRACK

OUTPUTS

DAW