Mackie VLZ3 4BUS Manual De Usuario

14

   VLZ3 4•Bus

This is where you plug in your external talkback 

microphone if you need to have one. You may use a 
dynamic or self-powered condenser microphone.

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. 

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 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.

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    
VLZ3 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.