Mackie 1220i 18. HI-ZSWITCH (Ch. 1 and 2 only), 19. LOW CUT (Ch.1–4only), 21U

	YX
N
O

9

1

MIC PRE

			2				3
	YX	M			YX	M
		IC	PR			IC	PR
N				N
O			E	O			E

	YX
N
O

MIC

4	CTRL - RM OUT	MAIN OUT	ALT 3-4 OUT	TAPE
	BAL/UNBAL	BAL/UNBAL	BAL/UNBAL	L
P
R
E

12					IN	OUT
L	R	L	R	L/3	R/4	R
LINE IN 5-6	LINE IN 7-8		LINE IN 9-10	LINE IN 11-12

10

1

2

3

4

L

L

L

L

LINE

LINE

LINE

LINE

11

(MONO)

(MONO)

(MONO)

(MONO)

18

BAL/UNBAL

BAL/UNBAL

BAL/UNBAL

BAL/UNBAL

BAL/UNBAL

BAL/UNBAL

BAL/UNBAL

BAL/UNBAL

LINE

LINE

HI-Z

HI-Z

75Hz

75Hz

R

R

R

R

18dB/OCT

18dB/OCT

19

48V 20

48V

48V

48V

PREMIUM ANALOG MIXER w/ PERKINS EQ & FIREWIRE

CTRL ROOM/PHONES

30

30

30

30

U

U

U

U

U

U

U

U

SOURCE

0dB=0dBu

40

40

40

40

20

20

20

20

21U

GAIN

GAIN

GAIN

GAIN

GAIN

GAIN

GAIN

GAIN

L

R

60

U

60

U

60

U

60

-20dB

-20dB

-20dB

-20dB +20dB 23

20

CLIP

-20dB

+40dB

-20dB

+40dB

-20dB

+40dB

-20dB

+40dB

+20dB

+20dB

+20dB

MAIN MIX

15

SEND

SEND

SEND

SEND

SEND

SEND

SEND

SEND

INPUT

10

22

PRE

PRE

PRE

PRE

PRE

PRE

PRE

6

POST

POST

POST

POST

POST

POST

POST

U

EQ

U

EQ

U

EQ

U

EQ

U

EQ

U

EQ

U

EQ

U

LINE

TAPE

3

FW 1-2

24

HIGH

HIGH

HIGH

HIGH

HIGH

HIGH

HIGH

HIGH

0

FW 1-2

ALT 3-4

2

12kHz

-15

12kHz

-15

12kHz

-15

12kHz

12kHz

12kHz

12kHz

12kHz

LEVEL

-15

+15

+15

+15

+15

-15

+15

-15

+15

-15

+15

-15

+15

4

SET

1k

1k

1k

1k

25

FREQ

FREQ

FREQ

FREQ

27

7

U

U

U

U

ASSIGN TO

10

100

8k

100

8k

100

8k

100

8k

MAIN MIX

20

MID

MID

MID

MID

U

U

U

U

26

2.5kHz

2.5kHz

2.5kHz

2.5kHz

30

MID

MID

MID

MID

-15

+15

-15

+15

-15

+15

-15

+15

OO

OO

-15

+15

-15

+15

-15

+15

-15

+15

MAX

MAX

RUDE

CONTROL

PHONES

U

U

U

U

U

U

U

U

SOLO

28

ROOM

LOW

LOW

LOW

LOW

LOW

LOW

LOW

LOW

80Hz

80Hz

80Hz

80Hz

80Hz

80Hz

80Hz

80Hz

AUX MASTER

-15

+15

-15

+15

-15

+15

-15

+15

-15

+15

-15

+15

-15

+15

-15

+15

18. HI-Z SWITCH (Ch. 1 and 2 only)

Engage this switch if you want to connect guitars directly to the 1/4" line inputs of channels 1 or 2.

Without this switch, you need to use a DI box first, before connecting guitars. If these switches are not pressed in, guitars will not sound good, particularly the high frequency response.

Plugging a guitar into a lower-impedance

line-level input can result in the loss of high

frequencies, causing an unnatural and dull sound. Normally, you must use a direct box between a guitar and a mixer’s input, which serves to

convert the impedance of the guitar from high to low. The hi-z inputs on channels 1 and 2 make the need for a direct box unnecessary. However: The hi-z inputs are unbalanced (when the switch is in), so if you’re doing a live show and running a long cord between the instrument and the mixer (say over 25 or 30 feet), it is best to use a direct box with a balanced output to avoid picking up noise over the length of the cord.

19. LOW CUT (Ch.1–4 only)

The mono channels each have a low-cut switch (often referred to as a high-pass filter) that cuts bass frequencies below 75 Hz at a rate of 18 dB per octave.

The low cut switch affects both the mic and line inputs.

We recommend that you use low-cut on every microphone application except kick drum, bass guitar, or bassy synth patches. These aside, there isn’t much down there that you want to hear, and filtering it out makes the low stuff you do want much more crisp and tasty. Not only that, but low-cut can help reduce the possibility of feedback in live situations, and it helps to conserve amplifier power.

Another way to consider low-cut’s function

is that it actually adds flexibility during live

performances. With the addition of low-cut, you can safely use low equalization on vocals.

Many times, bass shelving EQ can really benefit voices. Trouble is, adding low EQ also boosts stage rumble, mic handling clunks and breath pops from way-down low.

Applying low-cut removes all those problems, so you can add low EQ without blowing your subwoofers.

Owner's Manual 17