14
VLZ4 4•Bus
19. Talkback Mic
This is where to plug in an external talkback
microphone. Dynamic and self-powered condenser
microphones work well.
20. Power
Press the top of this rocker switch inwards to turn on
the mixer. The front panel power LED [57] will glow
with happiness, or at least it will if you have the mixer
plugged into a suitable live AC mains supply.
Press the bottom of this switch to put the mixer into
standby mode. It will not function, but some circuits are
still live. To remove AC power, either turn off the AC
mains supply, or unplug the power cord from the mixer
and the AC mains supply.
As a general guide, you should turn on your
mixer first, before any external power
amplifiers or powered speakers, and turn it
off last. This will reduce the possibilities of any turn-on,
or turn-off thumps in your speakers.
21. 48V Phantom Power
Most modern professional condenser mics require
48V phantom power, which lets the mixer send
low-current DC voltage to the mic’s electronics through
the same wires that carry audio. (Semi-pro condenser
mics often have batteries to accomplish the same
thing.) “Phantom” owes its name to an ability to be
“unseen” by dynamic mics (Shure SM57/SM58, for
instance), which don’t need external power and aren’t
affected by it anyway.
Press the top of this switch in if your microphone
requires phantom power. (Always check the position
of this switch before connecting microphones.) A red
LED [56] will illuminate just above the main mix
meters [58] to indicate that phantom power is active.
This is a global switch that affects all mic channels' XLR
jacks at once.
Never plug single-ended (unbalanced)
micro phones, or ribbon mics into the mic
input jacks if phantom power is on. Do not
plug instrument outputs into the mic XLR input jacks
with phantom power on, unless you know for certain it
is safe to do so.
Be sure the main level [75] is turned
down when connecting microphones to the mic inputs
when phantom power is turned on, to prevent pops from
getting through to the speakers.
22. Power Connection
This is a standard 3-prong IEC power connector.
Connect the detachable linecord (included in the box
with your mixer) to the power receptacle, and plug the
other end of the linecord into an AC outlet. The
VLZ4 4•Bus Series Mixers have a universal power
supply that can accept
any AC voltage ranging from
100 VAC to 240 VAC. No need for voltage select switches.
It will work virtually anywhere in the world. That’s why
we call it a “Planet-Earth” power supply! It is less
susceptible to voltage sags or spikes, compared to
conventional power supplies, and provides greater
electromagnetic isolation and better protection against
AC line noise.
Disconnecting the plug’s ground pin is
dangerous. Don’t do it.
POWER
ON
PHANTOM
ON
3
2
1
2
1
2
1
6
5
4
3
2
1
6
5
4
3
2
1
4
SUBGROUP OUTS
BAL / UNBAL
SUBGROUP INSERTS
TIP SEND, RINGRETURN
AUX INSERTS
TIP SEND, RING RETURN
AUX SENDS
BAL / UNBAL
3
2
1
4
L
R
MONO
L
R
MONO
STEREO RETURNS
BAL / UNBAL
21/22
23/24
BAL / UNBAL
BAL / UNBAL
MONITOR
MONO
MONITOR
L
R
100 - 240 V
50 - 60 Hz 55W
TALKBACK
MIC
RIGHT
MAIN OUT
INSERT
LINE
LEFT
MAIN OUT
INSERT
LINE
MONO
MAIN OUT
INSERT
LINE
LEVEL
OUTPUT
L
USB
R
L
R
TAPE
OUT
IN
TIP SEND
RING RETURN
TIP SEND
RING RETURN
TIP SEND
RING RETURN
BAL / UNBAL
BAL / UNBAL
BAL / UNBAL
20
20
20
19
19
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16
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15
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15
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14
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13
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9
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8
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7
7
6
6
6
5
5
5
4
4
4
3
3
3
2
2
2
1
1
1
ONYX MIC PREAMPS
LINE
(BAL / UNBAL)
INSERTS
(TIP SEND, RING RETURN)
L
INE
(BAL / UNBAL)
I
NSERTS
(TIP SEND, RING RETURN)
ONYX MIC PREAMPS
UNBALANCED
REVISION
SERIAL NUMBER
REPLACE WITH THE SAME TYPE FUSE AND RATING.
DISCONNECT SUPPLY CORD BEFORE CHANGING FUSE
UTILISE UN FUSIBLE DE RECHANGE DE MÊME TYPE.
DEBRANCHER AVANT DE REMPLACER LE FUSIBLE
WARNING:
TO REDUCE THE RISK OF FIRE OR ELECTRIC
SHOCK, DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR
MOISTURE. DO NOT REMOVE COVER. NO USER SERVICEABLE
PARTS INSIDE. REFER SERVICING TO QUALIFIED PERSONNEL.
AVIS: RISQUE DE CHOC ELECTRIQUE — NE PAS OUVRIR
THIS DEVICE COMPLIES WITH PART 15 OF THE FCC RULES FOR THE U.S. AND THE ICES-003 FOR CANADA. OPERATION
IS SUBJECT TO THE FOLLOWING TWO CONDITIONS: (1) THIS DEVICE MAY NOT CAUSE HARMFUL INTERFERENCE, AND
(2) THIS DEVICE MUST ACCEPT ANY INTERFERENCE RECEIVED, INCLUDING INTERFERENCE THAT MAY CAUSE
UNDESIRED OPERATION.
+6
U
3
14
20
2
13
1
16
11
17
12
22
7
7
9
18
21
19
4
15
5
10
8
8
8
6
