Mackie Big Knob Operation Manual page 12

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
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 either +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.
POWER
~100-240 VAC
A
MONITOR MONITOR
50/60 Hz 25W
ON
-10dB +4dB -10dB
L L
AC SELECT
100 - 120V 220 - 240V
R R
BAL/UNBAL BAL/UNBAL
12
BIG KNOB
Knob or
OUTPUTS
B C
MONITOR
2-TRACK 2-TRACK DAW
A B OUTPUT
+ 4 + 4 + 4
dB dB dB
+4dB -10dB + 4dB
-10 -10 -10
dB dB dB
L L L L
R R R R
BAL/UNBAL BAL/UNBAL BAL/UNBAL BAL/UNBAL
DESIGNED BY MACKOIDS IN WOODINVILE, WA, USA • "BIG KNOB" & "MACKIE" ARE TRADEMARKS OF LOUD TECHNOLOGIES INC. • COPYRIGHT ©2004
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
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.
DAW
STUDIO
PHONES PHONES
2 - TRACK
AMP MIX INPUT
A
L
U
+ 4
dB + 4 dB
-10dB + 4dB
-10
dB -10 dB
L L L
-10dB + 10dB
DAW
MIX
R R R L
U
-10dB + 10dB
BAL/UNBAL
BAL/UNBAL BAL/UNBAL
AC SELECT Switch
SOURCES
+ 4dB 2 - TRACK +
- 10dB - 10dB
B
(MONO) (MONO)
R L
U
BAL/
-10dB + 10dB
UNBAL
GROUND
+ 4dB
PHONO
- 10dB
(MONO)
L R
R
U
RIAA
BAL/ -10dB + 10dB
UNBAL
4dB
R
BAL/
UNBAL
TALK BACK
FOOT
SWITCH