Mackie PPM1012 Channel Controls, Stereo Channels 9/10 and 11/12, Like Unity gain, Signal Flow

Channel Controls

The 10 vertical channel strips look very similar, and have a only few differences between them. Each chan- nel works independently, and just controls the signals plugged into the inputs directly above it.

1

1

MIC 1

MIC 2

MIC 3

MIC 4

MIC 5

MIC 6

MIC 7

MIC 8

2

2

MON SEND

FX SEND

HI-Z

HI-Z

L

L

LINE

LINE

LINE

LINE

LINE

LINE

LINE

LINE

(BAL/UNBAL)

(BAL/UNBAL)

(BAL/UNBAL)

(BAL/UNBAL)

(BAL/UNBAL)

(BAL/UNBAL)

(BAL/UNBAL)

(BAL/UNBAL)

(MONO)

(MONO)

INSERT

INSERT

INSERT

INSERT

INSERT

INSERT

INSERT

INSERT

R

R

INPUT 9/10

INPUT 11/12

1

2

3

4

5

6

7

8

9/10

11/12

U

U

U

U

U

U

U

U

U

U

IC GAI

IC GAI

IC GAI

IC GAI

IC GAI

IC GAI

IC GAI

IC GAI

M

N

M

N

M

N

M

N

M

N

M

N

M

N

M

N

0

+50

0

+50

0

+50

0

+50

0

+50

0

+50

0

+50

0

+50

-20

+20

-20

+20

-20dB

+30dB

-20dB

+30dB

-20dB

+30dB

-20dB

+30dB

-20dB

+30dB

-20dB

+30dB

-20dB

+30dB

-20dB

+30dB

GAIN

GAIN

GAIN

GAIN

GAIN

GAIN

GAIN

GAIN

GAIN

GAIN

LOW CUT

LOW CUT

LOW CUT

LOW CUT

LOW CUT

LOW CUT

LOW CUT

LOW CUT

100 Hz

100 Hz

100 Hz

100 Hz

100 Hz

100 Hz

100 Hz

100 Hz

COMP

COMP

COMP

COMP

COMP

COMP

HI-Z

HI-Z

OFF

MAX

OFF

MAX

OFF

MAX

OFF

MAX

OFF

MAX

OFF

MAX

U

EQ

U

EQ

U

EQ

U

EQ

U

EQ

U

EQ

U

EQ

U

EQ

U

EQ

U

EQ

HI

HI

HI

HI

HI

HI

HI

HI

HI

HI

12kHz

12kHz

12kHz

12kHz

12kHz

12kHz

12kHz

12kHz

12kHz

12kHz

-15

+15

-15

+15

-15

+15

-15

+15

-15

+15

-15

+15

-15

+15

-15

+15

-15

+15

-15

+15

U

U

U

U

U

U

U

U

U

U

MID

MID

MID

MID

MID

MID

MID

MID

HI

HI

MID

MID

2.5kHz

2.5kHz

-15

+15

-15

+15

-15

+15

-15

+15

-15

+15

-15

+15

-15

+15

-15

+15

-15

+15

-15

+15

600

600

600

600

600

600

600

600

U

U

150

1.5k

150

1.5k

150

1.5k

150

1.5k

150

1.5k

150

1.5k

150

1.5k

150

1.5k

LOW

LOW

MID

MID

FREQ

FREQ

FREQ

FREQ

FREQ

FREQ

FREQ

FREQ

400Hz

400Hz

-15

+15

-15

+15

100

8k

100

8k

100

8k

100

8k

100

8k

100

8k

100

8k

100

8k

U

U

U

U

U

U

U

U

U

U

LOW

LOW

LOW

LOW

LOW

LOW

LOW

LOW

LOW

LOW

80Hz

80Hz

80Hz

80Hz

80Hz

80Hz

80Hz

80Hz

80Hz

80Hz

-15

+15

-15

+15

-15

+15

-15

+15

-15

+15

-15

+15

-15

+15

-15

+15

-15

+15

-15

+15

AUX

AUX

AUX

AUX

AUX

AUX

AUX

AUX

AUX

AUX

U

SEND

U

SEND

U

SEND

U

SEND

U

SEND

U

SEND

U

SEND

U

SEND

U

SEND

U

SEND

MON

MON

MON

MON

MON

MON

MON

MON

MON

MON

1

1

1

1

1

1

1

1

1

1

OO

+15

OO

+15

OO

+15

OO

+15

OO

+15

OO

+15

OO

+15

OO

+15

OO

+15

OO

+15

U

U

U

U

U

U

U

U

U

U

MON

MON

MON

MON

MON

MON

MON

MON

MON

MON

2

2

2

2

2

2

2

2

2

2

OO

+15

OO

+15

OO

+15

OO

+15

OO

+15

OO

+15

OO

+15

OO

+15

OO

+15

OO

+15

U

U

U

U

U

U

U

U

U

U

FX

FX

FX

FX

FX

FX

FX

FX

FX

FX

1

1

1

1

1

1

1

1

1

1

OO

+15

OO

+15

OO

+15

OO

+15

OO

+15

OO

+15

OO

+15

OO

+15

OO

+15

OO

+15

U

U

U

U

U

U

U

U

U

U

FX

FX

FX

FX

FX

FX

FX

FX

FX

FX

2

2

2

2

2

2

2

2

2

2

OO

+15

OO

+15

OO

+15

OO

+15

OO

+15

OO

+15

OO

+15

OO

+15

OO

+15

OO

+15

PAN

PAN

PAN

PAN

PAN

PAN

PAN

PAN

PAN

PAN

L R

L R

L R

L R

L R

L R

L R

L R

L R

L R

dB

1

dB

2

dB

3

dB

4

dB

5

dB

6

dB

7

dB

8

dB

9/10

dB

11/12

10

10

10

10

10

10

10

10

10

10

5

OL

5

OL

5

OL

5

OL

5

OL

5

OL

5

OL

5

OL

5

OL

5

OL

U

+10

U

+10

U

+10

U

+10

U

+10

U

+10

U

+10

U

+10

U

+10

U

+10

0

0

0

0

0

0

0

0

0

0

5

5

5

5

5

5

5

5

5

5

-20

-20

-20

-20

-20

-20

-20

-20

-20

-20

10

10

10

10

10

10

10

10

10

10

20

20

20

20

20

20

20

20

20

20

30

SOLO

30

SOLO

30

SOLO

30

SOLO

30

SOLO

30

SOLO

30

SOLO

30

SOLO

30

SOLO

30

SOLO

40

40

40

40

40

40

40

40

40

40

50

50

50

50

50

50

50

50

50

50

60

60

60

60

60

60

60

60

60

60

OO

OO

OO

OO

OO

OO

OO

OO

OO

OO

Stereo Channels 9/10 and 11/12

•Channels 9/10 and 11/12 are stereo channels, and their controls affect signals coming into the stereo line-level inputs

•The stereo channel EQ is a 4-band design with shelving high, shelving low, and peaking lo-mid and peaking hi-mid.

“U” like Unity gain

Mackie mixers have a “U” symbol on almost every level control. It stands for “unity gain,” meaning no change in signal level. The labels on the controls are measured in decibels (dB), so you’ll know what you’re doing level- wise if you choose to change a control’s settings.

Signal Flow

The block diagram on page 33 shows the signal flow, but here is a short description of the flow through the channel strip section:

The input signals from the mic, or line inputs go through a preamplifier whose gain is set by the gain control .

The signal then passes through the low-cut filter (mono channels only) the compressor circuit (ch. 1 to 6 only), the insert jack (mono channels only), the chan- nel EQ, channel fader, pan control, and then onto the main mix.

The mon 1 [33] and mon 2 controls [34] tap the signal off just before (pre) the channel fader.

Owner’s Manual

Mono Channels 1 to 8

•Channels 1 to 8 are mono channels, and their controls affect either the mono mic input or the mono line-level input.

•Channels 1 to 6 each have an internal signal in- line compressor circuit with adjustable thresh- old.

•Channels 7 and 8 each have a hi-z switch, so you can connect guitars directly, without the need for a DI box.

•The 3-band EQ has shelving high, shelving low, and peaking mid EQ with adjustable mid frequency.

The FX 1 [35] and FX 2 controls [36] tap the signal off after (post) the channel fader.

Owner’s Manual

15