Mackie BIGK NOB Operation Manual Download Page 12

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BIG KNOB

BIG KNOB

PHONES AMP and STUDIO OUT

The PHONES AMP and STUDIO OUTS have the
option of being fed signal by the currently selected
INPUT SOURCE SELECT buttons (thus mirroring
the mix being heard by the engineer) or the signal
connected to the DAW PHONES MIX INPUT con-
nectors (thus providing a separate unique monitor-
ing mix for the talent).

This allows the engineer to listen to his or her own
master mix in the control room, while allowing the
talent to listen to a customized headphone mix at
the same time through the PHONES 1 or 2 outputs
on the front panel or through an external headphone
amp connected to the PHONES AMP OUTPUT on
the rear panel, as well as the studio monitor outs
(STUDIO OUTS). The choice of which stereo signal
(current source or headphone mix input) is heard is
determined by the PHONES/STUDIO OUTS SOURCE

select button on the front panel.

PHONES AMP OUTPUTS

Connect these stereo 1/4-inch balanced/unbalanced
connectors to an external multi-headphone amplifi -
er. This allows you to connect multiple sets of head-
phones for the talent. The PHONES AMP OUTPUT
level is not affected by the Big VOLUME

Knob or

the headphone level controls on the front panel. The
headphone amplifi er should have its own individual
volume controls for the headphones.

PHONES AMP Level Switch

This two-position switch sets the level of the PHONES
AMP outputs to 4 dB (out) or –10 dB (pushed
in). Use the +4 dB setting when connecting to balanced
inputs on professional equipment operating at the
+4 dBu standard, and use the –10 dB setting when
connecting to unbalanced inputs on consumer equip-
ment operating at the –10 dBV standard.

STUDIO OUTS

Connect these stereo 1/4-inch balanced/unbalanced
connectors to a pair of active monitors (or to an
amplifi er and passive monitors) in the studio per-
formance space. This allows the performers to hear
playback without having to use headphones, and
allows the control room engineer to communicate
to the performers through the talkback system. The
STUDIO OUTS level is controlled by the STUDIO
OUTS LEVEL

control on the front panel.

STUDIO OUTS Trim Control

This trim control adjusts the sensitivity of the
STUDIO OUTS signal. Use the +4 dB setting when
connecting to balanced inputs on professional equip-
ment operating at the +4 dBu standard, and use the
–10 dB setting when connecting to unbalanced inputs
on consumer equipment operating at the –10 dBV
standard. Although the trim control is typically set to
one side or the other, it can be adjusted to any setting
between the +4 and –10 positions if necessary.

AC Socket

Connect the included detachable power cord to
this AC socket (2-prong IEC connector) on the rear
panel. Make sure the AC SELECT switch is set to
the correct AC voltage (see

AC SELECT Switch

below).

POWER Switch

This rocker style switch turns power on and off for
Big Knob.

AC SELECT Switch

Set this switch to the 100-120V position for 100 VAC
and 120 VAC power, and to the 220-240V position for
220 VAC and 240 VAC power.

POWER

~100-240 VAC
50/60 Hz 25W

AC SELECT

220-240V

100-120V

BAL/UNBAL