Справочник Пользователя для Mackie VLZ3 4BUS

Owner's Manual   

9

This is a female XLR connector that accepts a  

balanced mic or line level input from almost any type of 
source. The mic preamps feature our XDR2 design, with 
higher fidelity and headroom rivaling any standalone 
mic preamp on the market today.

The XLR inputs are wired as follows: 

 

Pin 1 = Shield or ground 

 

Pin 2 = Positive (+ or hot) 

 

Pin 3 = Negative (– or cold)

We use phantom-powered, balanced  inputs just like 

the big mega-consoles, for  exactly the same reason: This 
kind of circuit is   excellent at rejecting hum and noise. 

Professional ribbon, dynamic, and condenser mics all 

sound excellent through these inputs. The mic/line  
inputs will handle any kind of level you can toss at 
them, without overloading. 

Microphone-level signals are passed through the 

mixer's splendid microphone preamplifiers to become 
line-level signals.

The XDR2 preamps accept balanced line-level signals 

because the mixer is equipped with a -20 dB pad on 
channels 1-16 (2404-VLZ3) and channels    

 

1-24 (3204-VLZ3) so hot signals may pass.

See Appendix B (page 29) for further details and 

some rather lovely drawings of the connectors you can 
use with your mixer. 

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. 

Phantom power may be selected by pressing up on the  

mixer's phantom [21] switch.

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 are certain it is safe 
to do so.

These 1/4" jacks share circuitry (but not phantom 

power) with the mic preamps, and can be driven by  
balanced or unbalanced sources.

To connect balanced lines to these inputs, use a 1⁄4" 

Tip-Ring-Sleeve (TRS) plug, wired as follows: 
 

Tip = Positive (+ or hot) 

 

Ring = Negative (– or cold) 

 

Sleeve = Shield or ground

To connect unbalanced lines to these  inputs, use a 

1⁄4" mono (TS) phone plug, wired as follows: 
 

Tip = Positive (+ or hot) 

 

Sleeve = Shield or ground