17
Owner’s Manual
Owner
’s Manual
GAIN
INSERT
LOW CUT
EQ
EQ
IN/OUT
MUTE
FADER
PAN
ASSIGN
MAIN MIX
SUB 1-2
SUB 3-4
AUX SEND 1 MASTER
MASTER SECTION
AUX SEND 1
AUX SEND 2
"POST" SIGNAL
"PRE" SIGNAL
AUX SEND 2 MASTER
INPUT
AUX SEND 2 PRE/POST SWITCH
AUX SEND 1 PRE/POST SWITCH
TO AUX SEND 1
OUTPUT
TO AUX SEND 2
OUTPUT
Auxiliary Section
This section includes the AUX MASTERS (Sends) and
the AUX RETURNS. These can be a bit confusing to the
uninitiated, so here’s the whole idea behind aux sends
and returns: sends are outputs and returns are inputs.
AUX SENDs tap signals off the channels, via the AUX
knobs [11], mix these signals together, then send them
out the AUX SEND jacks [62].
These outputs are fed to the inputs of an external
processor like a reverb or digital delay. From there,
the outputs of this external device are fed back to the
mixer’s AUX RETURN jacks [61]. Then these signals are
sent through the AUX RETURN level controls [38], and
fi nally delivered to the MAIN MIX [46].
So, the original “dry” signals go from the channels to
the MAIN MIX and the affected “wet” signals go from
the AUX RETURNS to the MAIN MIX, and once mixed
together, the dry and wet signals combine to create a
glorious sound!
The AUX SENDS can also be used to provide another
mix for stage monitors, for example. In this case, the
AUX RETURNS aren’t used to return the signal. Instead,
they can be used as additional stereo inputs.
35. AUX 1 -6 MASTERS
The AUX MASTERS provide overall control over the
AUX SEND levels, just before they are delivered to the
AUX SEND outputs [62]. These knobs go from off (
∞
)
to +15 dB when turned all the way up.
This is usually the knob you turn up when the lead
singer glares at you, points at his stage monitor, and
sticks his thumb up in the air. (It would follow that if
the singer stuck his thumb down, you’d turn the knob
down, but that never happens.)
36. AUX PRE/POST
The PRE/POST switches determine whether the AUX
SEND signal is tapped from the channel before the fader
(pre-fader) or after the fader (post-fader). Typically,
you use a pre-fader send for monitors so you can control
the monitor levels independently from the MAIN MIX.
Use a post-fader send for effects, so that the “wet” signal
level follows the “dry” signal level.
Most other mixing consoles require you to assign the
pre/post function in pairs (Aux 1/2, Aux 3/4), which can
be very limiting if you want to provide three monitor
sends and one effects send, for example. The Onyx 1640
allows you to assign the pre/post function for each AUX
SEND individually!
Both pre- and post-fader sends are affected by the
MUTE button and the EQ controls (unless the EQ is
bypassed, of course).
Aux “Pre vs. Post”
Signal Flow Diagram
5
MON
MAIN
SUBS
CR/
PHONES
ONLY
SUBS
1-2
3-4
SEND
TO
4
1
SUB ASSIGN
TO AUX 5
2
TO AUX 6
AUX
SENDS
AUX MASTERS
AUX
RETURNS
4
SOLO
PRE
POST
SOLO
PRE
POST
SOLO
PRE
POST
SOLO
PRE
POST
SOLO
PRE
POST
SOLO
PRE
POST
EFX
TO
MON
4
MON
3
MON
3
2
MON
1
MON
6
MON
O
O
+15
O
O
+15
O
O
+10
O
O
+10
O
O
+10
O
O
+10
O
O
+10
O
O
+10
O
O
+15
O
O
+15
O
O
+15
O
O
+15
Summary of Contents for 1640
Page 1: ...O W N E R S M A N U A L...
