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MONITOR
SUBGROUP INSERTS
TIP SEND, RINGRETURN
17
L
4
3
12
2
15
SUBGROUP OUTS
MONITOR
MONO
BAL / UNBAL
16
R
4
3
11
2
AUX INSERTS
TIP SEND, RING RETURN
14
6
5
4
3
2
AUX SENDS
BAL / UNBAL
13
6
5
4
3
2
100 - 240 V
50 - 60 Hz 55W
POWER
ON
22
20
3. Insert
These unbalanced 1/4" jacks are for connecting serial
effects processors such as compressors, equalizers,
de-essers, or filters. The insert point is after the gain
control [23] and low cut filter [24], but before the
channel's EQ [31-36] and level [43]. The channel signal
can go out of the insert jack to an external device, be
processed and come back in on the same insert jack. To
do this requires a standard insert cable that must be
wired thusly:
ring
tip
sleeve
This plug connects to one of the
mixer's Channel Insert jacks.
Tip = Send (output to effects device)
Ring = Return (input from effects device)
Sleeve = Common ground
Insert jacks may be used as channel direct outputs;
post-gain, and pre-EQ. See the connector section on
page 30 (figure G) showing three ways to use insert
cables.
4. Stereo Line Ins
The stereo line inputs are designed for 1/4" TRS
balanced or 1/4" TS unbalanced signals. They may
accept any line-level instrument, effects device, CD
player, etc.
Level control is available -20 dB to +20 dB if you are
connecting a mono source. Use the left (mono) stereo
return input, and the mono signals will appear on both
sides of the main mix.
10
VLZ4 4•Bus
21/22
23/24
INSERTS (TIP SEND, RING RETURN)
BAL / UNBAL
BAL / UNBAL
1
20
19
L
4
MONO
LINE (BAL / UNBAL)
1
20
19
R
STEREO RETURNS
BAL / UNBAL
1
2
1
ONYX MIC PREAMPS
L
5
MONO
1
2
1
R
20
19
RIGHT
TALKBACK
MIC
PHANTOM
ON
INSERT
LINE
TIP SEND
RING RETURN
BAL / UNBAL
21
19
8
SEND to processor
(TRS plug)
RETURN from processor
18
17
16
15
18
17
16
15
18
17
16
15
LEFT
MAIN OUT
MAIN OUT
INSERT
LINE
7
7
TIP SEND
RING RETURN
BAL / UNBAL
8
5. Stereo Returns 1-2
The stereo (aux) returns are designed for 1/4" TRS
balanced or 1/4" TS unbalanced signals, from -20 dB to
+20 dB. They allow the stereo processed output from
external effects processors or other devices to be added
to the main mix.
Level adjustment of the incoming signals is made with
the stereo return controls [54].
You may also use these inputs to add any stereo
line-level signals to your main mix, so it could be
another line-level source, not just an effects processor.
tip
If you are connecting a mono source, use the left
(mono) stereo return input, and the mono signals will
ring
appear on both sides of the main mix.
6. Tape Ins / Outs
The stereo unbalanced RCA inputs allow you to play
a CD player, iPod
The tape in jacks accept an unbalanced signal using
standard hi-fi hookup cables.
The stereo unbalanced RCA outputs allow you to
record the main stereo mix onto a hard disk recorder
or automatic CD burner, for example. This lets you
make a recording for posterity/archive/legal purposes
whenever the band gets back together again.
The tape output is the stereo main mix, and it is not
affected by the main mix level control [75]. The output
could also be used as an extra set of main outputs for
feeding another zone.
14
13
12
11
14
13
12
11
14
13
12
11
MONO
TAPE
MAIN OUT
IN
INSERT
LINE
OUTPUT
9
L
U
R
+6
LEVEL
TIP SEND
RING RETURN
BAL / UNBAL
8
10
6
UNBALANCED
dock, or other line-level source.
®
3
10
9
8
7
2
10
9
8
7
1
10
9
8
7
OUT
USB
L
18
R
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