Справочник Пользователя для Mackie 1220I

Owner's Manual   

13

Professional ribbon, dynamic, and condenser mics all 

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

Microphone-level signals are passed through the 

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

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 for each channel can be selected  

using that channel's phantom [20] 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.

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

Insert jacks continued...

Insert jacks can be used as channel direct outputs; 

post-gain, and pre-EQ. See the connector section on 
page 29 (fi gure G) showing three ways to use inserts.

This is where you plug in things such as: microphones, 

line-level  instruments, guitars, effects, a  recorder, PA 
system, powered monitors, powered subwoofer, etc. 
Check out the hookup diagrams for some connection 
ideas. See Appendix B (page 28) for further details and 
some rather lovely drawings of the connectors you can 
use with your mixer. 

This is a female XLR connector, that accepts a 

balanced microphone input from almost any type of 
microphone. The microphone preamps feature our Onyx 
design, with higher fi delity 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  microphone 

inputs just like the big studio mega-consoles, for  exactly 
the same reason: This kind of circuit is   excellent at  
rejecting hum and noise. You can plug in almost any 
kind of mic that has a standard  XLR-type male mic   
connector.

48V

48V

48V

48V

ON

YX MIC PRE

 

HI-Z

LINE

PREMIUM ANALOG MIXER 

w/ PERKINS EQ & FIREWIRE

 

TAPE 

MAIN OUT

IN

OUT

L

R

BAL/UNBAL

BAL/UNBAL

ALT 3-4 OUT

BAL/UNBAL

CTRL - RM OUT

L

L

L

L

R

R

R

R

(MONO)

(MONO)

(MONO)

(MONO)

R/4

L/3

L

R

L

R

1

2

75Hz

18dB/OCT

3

75Hz

18dB/OCT

4

ON

YX MIC PRE

 

HI-Z

LINE

ON

YX MIC PRE

 

ON

YX MIC PRE

 

1

LINE

2

LINE

4

LINE

3

LINE

BAL/UNBAL

BAL/UNBAL

BAL/UNBAL

BAL/UNBAL

BAL/UNBAL

BAL/UNBAL

BAL/UNBAL

BAL/UNBAL

LINE IN 9-10

LINE IN 11-12

LINE IN 7-8

LINE IN 5-6

9

10
18
19

20

12

13

14

15

16

11

17