Yamaha GF24-12, GF12-12, GF16-12 User Manual

0 (0)

MIXING CONSOLE

Owner’s Manual

Keep This Manual For Future Reference.

E

WARNING: THIS APPARATUS MUST BE EARTHED

IMPORTANT

THE WIRES IN THIS MAINS LEAD ARE COLOURED IN ACCORDANCE WITH THE FOLLOWING CODE:

GREEN-AND-YELLOW : EARTH

BLUE : NEUTRAL

BROWN : LIVE

As the colours of the wires in the mains lead of this apparatus may not correspond with the coloured markings identifying the terminals in your plug, proceed as follows:

The wire which is coloured GREEN and YELLOW must be connected to the terminal in the plug which is marked by the letter E or by the safety earth symbol or coloured GREEN and YELLOW.

The wire which is coloured BLUE must be connected to the terminal which is marked with the letter N or coloured BLACK.

The wire which is coloured BROWN must be connected to the terminal which is marked with the letter L or coloured RED.

*This applies only to products distributed by YAMAHA KEMBLE MUSIC (U.K.) LTD.

Precautions 3

Precautions

Warnings

Do not allow water to enter this unit or allow the unit to become wet. Fire or electrical shock may result.

Connect this unit’s power cord only to an AC outlet of the type stated in this Owner’s Manual or as marked on the unit. Failure to do so is a fire and electrical shock hazard.

Do not scratch, bend, twist, pull, or heat the power cord. A damaged power cord is a fire and electrical shock hazard.

Do not place heavy objects, including this unit, on top of the power cord. A damaged power cord is a fire and electrical shock hazard. In particular, be careful not to place heavy objects on a power cord covered by a carpet.

If you notice any abnormality, such as smoke, odor, or noise, or if a foreign object or liquid gets inside the unit, turn it off immediately. Remove the power cord from the AC outlet. Consult your dealer for repair. Using the unit in this condition is a fire and electrical shock hazard.

Should this unit be dropped or the cabinet be damaged, turn the power switch off, remove the power plug from the AC outlet, and contact your dealer. If you continue using the unit without heeding this instruction, fire or electrical shock may result.

If the power cord is damaged (i.e., cut or a bare wire is exposed), ask your dealer for a replacement. Using the unit with a damaged power cord is a fire and electrical shock hazard.

Do not remove the unit’s cover. You could receive an electrical shock. If you think internal inspection, maintenance, or repair is necessary, contact your dealer.

Do not modify the unit. Doing so is a fire and electrical shock hazard.

Cautions

This unit has ventilation holes at the top and right side to prevent the internal temperature rising too high. Do not block them. Blocked ventilation holes are a fire hazard.

Hold the power cord plug when disconnecting it from an AC outlet. Never pull the cord. A damaged power cord is a potential fire and electrical shock hazard.

Do not touch the power plug with wet hands. Doing so is a potential electrical shock hazard.

Operating Notes

Using a mobile telephone near this unit may induce noise. If noise occurs, use the telephone away from the unit.

XLR-type connectors are wired as follows:

pin 1: ground, pin 2: hot (+), and pin 3: cold (–).

Insert TRS phone jacks are wired as follows: sleeve: ground, tip: send, and ring: return.

The performance of components with moving contacts, such switches, rotary controls, faders, and connectors, deteriorates over time. The rate of deterioration depends on the operating environment and is unavoidable. Consult your dealer about replacing defective components.

—Owner’s Manual

4 Introduction

Introduction

Thank you for purchasing the Yamaha GF24/12, GF16/12, or GF12/12 mixing console. These mixers provide an ample twelve outputs, and are suitable for a wide variety of applications ranging from concert sound reinforcement to installed systems. In order to take full advantage of the mixer’s functionality and to enjoy years of trouble-free performance, please read this manual carefully.

Note:

This owner’s manual assumes that you are familiar with basic operation of a mixing console and its specialized vocabulary.

At points where the specifications of the GF24/12, GF16/12, and GF12/12 differ, the specifications of the GF16/12 and GF12/12 are given in curly brackets { }.

Features of the system

In addition to the main stereo outputs, this mixer provides six AUX outputs plus four group outputs (a total of 12 outputs). The AUX/GROUP outputs can be used not only as sends to external effect processors or to a multitrack recorder, but are also ideal for creating separate foldback mixes for each speaker and amp.

The MONO OUT jack can be controlled independently from the STEREO OUT jacks. Since a monaural mix of the main output is sent from this output, it can be used to extend a PA system.

All input channels provide a high-pass filter, a three-band EQ, and 60 mm faders.

All input channels/AUX returns provide a PFL switch, and AUX/group/stereo output channels provide an AFL switch. You can audition input and output sources at the touch of a button.

All mono input channels provide balanced XLR type and TRS phone jack connectors that accommodate a range of sources from mics to line level devices.

Switchable phantom power is provided. This can supply DC +48 V power from the XLR type input connectors to condenser mics and direct boxes that require an external power supply.

Two stereo input channels allow connection of line-level equipment. 1/4" phone jack and phono jack inputs can be selected by a switch.

Two stereo AUX returns are provided. This allows AUX return signals to be sent to an AUX bus or GROUP bus as well as to the ST bus. These can also be used as spare line level input jacks.

An insert I/O jack is provided on each mono input channel and on the ST bus, allowing you to insert external effect processors as desired.

The TAPE IN jacks and REC OUT jacks let you easily connect a master recorder for recording or playback.

Contents

 

Front and rear panel .......................

5

Channel controls ..................................

6

Master controls ..................................

10

Connectors ........................................

17

Specifications................................

21

General specifications.........................

21

Input specifications ............................

22

Output specifications .........................

22

Dimensions ........................................

23

Block/Level Diagram ..........................

24

—Owner’s Manual

Yamaha GF24-12, GF12-12, GF16-12 User Manual

Front and rear panel

5

Front and rear panel

This section explains the names and functions of each section of the GF24/12, GF16/12, and GF12/12.

The functionality of these mixers is grouped into ten sections. These are the two channel control sections, seven master control sections, and the rear panel connectors. Their functions will be explained sequentially.

Front panel

6 7

9

POWER

1

 

2

 

3

 

4

 

5

 

6

 

7

 

8

 

9

 

10

11

17

18

19

20

21/22

23/24

 

 

 

 

 

 

 

 

PEAK

 

 

 

 

 

PEAK

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

+8

 

 

 

 

 

+8

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

+5

 

 

 

 

 

+5

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

+3

 

 

 

 

 

+3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

+1

 

 

 

 

 

+1

 

26dB

 

26dB

 

26dB

 

26dB

 

26dB

 

26dB

 

26dB

 

26dB

 

26dB

 

26dB

 

26dB

 

26dB

 

26dB

 

26dB

 

26dB

 

BA

 

BA

 

 

 

 

 

 

 

 

0

 

 

 

 

 

0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

–1

 

 

 

 

 

–1

GAIN

 

GAIN

 

GAIN

 

GAIN

 

GAIN

 

GAIN

 

GAIN

 

GAIN

 

GAIN

 

GAIN

 

GAIN

 

GAIN

 

GAIN

 

GAIN

 

GAIN

 

GAIN

 

GAIN

 

GROUP

 

GROUP

 

 

 

–3

 

 

 

 

 

–3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

–5

 

 

 

 

 

–5

+10

–34

+10

–34

+10

–34

+10

–34

+10

–34

+10

–34

+10

–34

+10

–34

+10

–34

+10

–34

+10

–34

+10

–34

+10

–34

+10

–34

+10

–34

 

 

 

 

1 0

 

 

3 0

 

 

 

 

–7

 

 

 

 

 

–7

–15

–60

–15

–60

–15

–60

–15

–60

–15

–60

–15

–60

–15

–60

–15

–60

–15

–60

–15

–60

–15

–60

–15

–60

–15

–60

–15

–60

–15

–60

+10

–34

+10

–34

10

 

10

 

 

 

–10

 

 

 

 

 

–10

80

80

80

80

80

80

80

80

80

80

80

80

80

80

80

80

80

 

 

 

 

 

 

 

 

–15

 

 

 

 

 

–15

PEAK

 

PEAK

 

PEAK

 

PEAK

 

PEAK

 

PEAK

 

PEAK

 

PEAK

 

PEAK

 

PEAK

 

PEAK

 

PEAK

 

PEAK

 

PEAK

 

PEAK

 

PEAK

 

PEAK

 

 

 

 

 

 

 

 

 

–20

 

 

 

 

 

–20

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2 0

10

 

4 0

10

 

 

 

 

 

 

 

 

 

 

HIGH

 

HIGH

 

HIGH

 

HIGH

 

HIGH

 

HIGH

 

HIGH

 

HIGH

 

HIGH

 

HIGH

 

HIGH

 

HIGH

 

HIGH

 

HIGH

 

HIGH

 

HIGH

 

HIGH

 

AUX

 

 

AUX

 

 

 

 

 

L

R

 

L

R

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1 0

 

 

3 0

 

 

 

 

 

 

STEREO

 

PFL•AFL/TAPE IN PHANTOM

–15

+15

–15

+15

–15

+15

–15

+15

–15

+15

–15

+15

–15

+15

–15

+15

–15

+15

–15

+15

–15

+15

–15

+15

–15

+15

–15

+15

–15

+15

–15

+15

–15

+15

10

 

10

 

 

 

 

1

2

 

3

4

 

MID

 

MID

 

MID

 

MID

 

MID

 

MID

 

MID

 

MID

 

MID

 

MID

 

MID

 

MID

 

MID

 

MID

 

MID

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

250

5K

250

5K

250

5K

250

5K

250

5K

250

5K

250

5K

250

5K

250

5K

250

5K

250

5K

250

5K

250

5K

250

5K

250

5K

MID

 

MID

 

2 0

10

 

4 0

10

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ST

 

 

ST

 

 

 

 

 

 

 

 

 

 

 

–15

+15

–15

+15

–15

+15

–15

+15

–15

+15

–15

+15

–15

+15

–15

+15

–15

+15

–15

+15

–15

+15

–15

+15

–15

+15

–15

+15

–15

+15

–15

+15

–15

+15

0

10

 

0

10

0

10

 

 

 

 

 

 

 

 

LOW

 

LOW

 

LOW

 

LOW

 

LOW

 

LOW

 

LOW

 

LOW

 

LOW

 

LOW

 

LOW

 

LOW

 

LOW

 

LOW

 

LOW

 

LOW

 

LOW

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

–15

+15

–15

+15

–15

+15

–15

+15

–15

+15

–15

+15

–15

+15

–15

+15

–15

+15

–15

+15

–15

+15

–15

+15

–15

+15

–15

+15

–15

+15

–15

+15

–15

+15

 

PFL

 

 

PFL

 

ON

 

 

 

 

 

 

 

 

AUX

AUX

AUX

AUX

AUX

AUX

AUX

AUX

AUX

AUX

AUX

AUX

AUX

AUX

AUX

AUX

AUX

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1 AUX RETURN 2

TAPE IN

 

MIXING CONSOLE

 

 

 

 

1 0

PRE

1 0

PRE

1 0

PRE

1 0

PRE

1 0

PRE

1 0

PRE

1 0

PRE

1 0

PRE

1 0

PRE

1 0

PRE

1 0

PRE

1 0

PRE

1 0

PRE

1 0

PRE

1 0

PRE

1 0

PRE

1 0

PRE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

10

10

10

10

10

10

10

10

10

10

10

10

10

10

10

10

10

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PHANTOM +48V

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

10

 

 

10

 

10

 

10

 

10

 

10

 

 

2 0

10

2 0

10

2 0

10

2 0

10

2 0

10

2 0

10

2 0

10

2 0

10

2 0

10

2 0

10

2 0

10

2 0

10

2 0

10

2 0

10

2 0

10

2 0

10

2 0

10

 

 

 

 

 

 

 

 

 

 

 

 

 

OFF

ON

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

5

 

 

5

 

5

 

5

 

5

 

5

 

 

 

PRE

 

PRE

 

PRE

 

PRE

 

PRE

 

PRE

 

PRE

 

PRE

 

PRE

 

PRE

 

PRE

 

PRE

 

PRE

 

PRE

 

PRE

 

PRE

 

PRE

 

0

 

 

0

 

0

 

0

 

0

 

0

 

 

3 0

10

3 0

10

3 0

10

3 0

10

3 0

10

3 0

10

3 0

10

3 0

10

3 0

10

3 0

10

3 0

10

3 0

10

3 0

10

3 0

10

3 0

10

3 0

10

3 0

10

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

5

 

 

5

 

5

 

5

 

5

 

5

METER SELECT

4 0

 

4 0

 

4 0

 

4 0

 

4 0

 

4 0

 

4 0

 

4 0

 

4 0

 

4 0

 

4 0

 

4 0

 

4 0

 

4 0

 

4 0

 

4 0

 

4 0

 

 

10

 

 

10

 

10

 

10

 

10

 

10

 

 

10

10

10

10

10

10

10

10

10

10

10

10

10

10

10

10

10

 

15

 

 

15

 

15

 

15

 

15

 

15

STEREO PFL•AFL

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

20

 

 

20

 

20

 

20

 

20

 

20

 

GROUP

 

PRE

 

PRE

 

PRE

 

PRE

 

PRE

 

PRE

 

PRE

 

PRE

 

PRE

 

PRE

 

PRE

 

PRE

 

PRE

 

PRE

 

PRE

 

PRE

 

PRE

 

30

 

 

30

 

30

 

30

 

30

 

30

 

 

5 0

5 0

5 0

5 0

5 0

5 0

5 0

5 0

5 0

5 0

5 0

5 0

5 0

5 0

5 0

5 0

5 0

 

40

 

 

40

 

40

 

40

 

40

 

40

 

 

10

10

10

10

10

10

10

10

10

10

10

10

10

10

10

10

10

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

AFL

AFL

 

AFL

 

AFL

 

AFL

 

AFL

TAPE IN

6 0

10

6 0

10

6 0

10

6 0

10

6 0

10

6 0

10

6 0

10

6 0

10

6 0

10

6 0

10

6 0

10

6 0

10

6 0

10

6 0

10

6 0

10

6 0

10

6 0

10

AUX 1

 

AUX 2

AUX 3

AUX 4

 

AUX 5

AUX 6

 

 

PAN

 

PAN

 

PAN

 

PAN

 

PAN

 

PAN

 

PAN

 

PAN

 

PAN

 

PAN

 

PAN

 

PAN

 

PAN

 

PAN

 

PAN

 

BAL

 

BAL

 

PAN

 

 

PAN

 

PAN

 

PAN

 

 

MONO

 

 

 

L

R

L

R

L

R

L

R

L

R

L

R

L

R

L

R

L

R

L

R

L

R

L

R

L

R

L

R

L

R

L

R

L

R

L

R

L

R

L

R

L

R

 

 

 

 

 

 

ODD

EVEN

ODD

EVEN

ODD

EVEN

ODD

EVEN

ODD

EVEN

ODD

EVEN

ODD

EVEN

ODD

EVEN

ODD

EVEN

ODD

EVEN

ODD

EVEN

ODD

EVEN

ODD

EVEN

ODD

EVEN

ODD

EVEN

ODD

EVEN

ODD

EVEN

 

 

0

10

0

10

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

C-R MONITOR

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

LEVEL

ON

 

ON

 

ON

 

ON

 

ON

 

ON

 

ON

 

ON

 

ON

 

ON

 

ON

 

ON

 

ON

 

ON

 

ON

 

ON

 

ON

 

 

TO ST

 

 

TO ST

 

TO ST

 

TO ST

 

 

 

POST

 

 

10

 

10

 

10

 

10

 

10

 

10

 

10

 

10

 

10

 

10

 

10

 

10

 

10

 

10

 

10

 

10

 

10

 

 

10

 

 

10

 

10

 

10

 

 

 

10

0

10

 

1–2

 

1–2

 

1–2

 

1–2

 

1–2

 

1–2

 

1–2

 

1–2

 

1–2

 

1–2

 

1–2

 

1–2

 

1–2

 

1–2

 

1–2

 

1–2

 

1–2

 

 

 

 

 

 

 

 

 

 

 

 

 

PHONES

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

LEVEL

5

 

5

 

5

 

5

 

5

 

5

 

5

 

5

 

5

 

5

 

5

 

5

 

5

 

5

 

5

 

5

 

5

 

 

5

 

 

5

 

5

 

5

 

 

 

5

 

 

0

3–4

0

3–4

0

3–4

0

3–4

0

3–4

0

3–4

0

3–4

0

3–4

0

3–4

0

3–4

0

3–4

0

3–4

0

3–4

0

3–4

0

3–4

0

3–4

0

3–4

 

0

 

 

0

 

0

 

0

 

 

 

0

 

 

5

ST

5

ST

5

ST

5

ST

5

ST

5

ST

5

ST

5

ST

5

ST

5

ST

5

ST

5

ST

5

ST

5

ST

5

ST

5

ST

5

ST

 

5

 

 

5

 

5

 

5

 

 

 

5

 

 

10

 

10

 

10

 

10

 

10

 

10

 

10

 

10

 

10

 

10

 

10

 

10

 

10

 

10

 

10

 

10

 

10

 

 

10

 

 

10

 

10

 

10

 

 

 

10

 

 

15

 

15

 

15

 

15

 

15

 

15

 

15

 

15

 

15

 

15

 

15

 

15

 

15

 

15

 

15

 

15

 

15

 

 

15

 

 

15

 

15

 

15

 

 

 

15

 

 

20

 

20

 

20

 

20

 

20

 

20

 

20

 

20

 

20

 

20

 

20

 

20

 

20

 

20

 

20

 

20

 

20

 

 

20

 

 

20

 

20

 

20

 

 

 

20

PHONES

30

 

30

 

30

 

30

 

30

 

30

 

30

 

30

 

30

 

30

 

30

 

30

 

30

 

30

 

30

 

30

 

30

 

 

30

 

 

30

 

30

 

30

 

 

 

30

 

 

40

 

40

 

40

 

40

 

40

 

40

 

40

 

40

 

40

 

40

 

40

 

40

 

40

 

40

 

40

 

40

 

40

 

 

40

 

 

40

 

40

 

40

 

 

 

40

 

 

 

PFL

 

PFL

 

PFL

 

PFL

 

PFL

 

PFL

 

PFL

 

PFL

 

PFL

 

PFL

 

PFL

 

PFL

 

PFL

 

PFL

 

PFL

 

PFL

 

PFL

 

 

AFL

AFL

 

AFL

 

AFL

 

 

 

AFL

 

 

1

 

2

 

3

 

4

 

5

 

6

 

7

 

8

 

9

 

10

11

17

18

19

20

21/22

23/24

GROUP 1

 

GROUP 2

GROUP 3

GROUP 4

 

 

STEREO

 

 

 

 

 

 

1

 

 

 

2

 

 

3

4 5 8

Channel controls

 

 

 

 

Master controls

1. Mono input channels (page 6)

 

3.

GROUP section (page 10)

2. Stereo input channels (page 8)

 

4.

AUX section (page 11)

 

 

 

 

 

 

 

 

 

5.

STEREO/MONO section (page 12)

 

 

 

 

 

 

 

 

 

6.

AUX RETURN section (page 13)

 

 

 

 

 

 

 

 

 

7.

TAPE IN section (page 14)

 

 

 

 

 

 

 

 

 

8.

Other controls/connectors (page 14)

Rear panel

 

 

 

 

 

 

9.

Meter section (page 16)

 

 

 

 

 

 

 

 

 

 

Connectors (page 17)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

INSERT I/O

 

 

 

 

 

C-R OUT +4dB

ST INSERT I/O 0dB AUX RETURN +4dB

 

OUT IN

 

 

 

 

R

L R

 

L 2L

(MONO)

1L

 

 

 

 

 

 

 

 

 

 

 

 

POWER

GROUP OUT +4dB

 

2R

 

1R 23L

INPUT B

 

 

 

 

 

1

 

 

21L INSERT I/O

INSERT I/O

INSERT I/O

 

ON/ OFF 4

3

2

 

 

 

 

 

 

 

 

 

 

 

0dB

0dB

 

0dB

 

 

 

AUX OUT +4dB (BALANCE)

 

24R

 

22R

 

 

 

 

6

5

4

3

2

1

 

 

INPUT

INPUT

 

INPUT

 

 

 

 

 

 

 

 

 

B

B

 

B

 

 

 

 

 

 

TAPE IN –10dBV

 

 

 

 

 

 

 

 

 

 

 

 

23L

(MONO)

21L

 

 

 

 

 

 

R

 

L

R

L 24R

INPUT A

22R

 

 

 

 

MONO OUT +4dBV

STEREO OUT +4dBV

REC OUT –10dBV

INPUT A

INPUT A

INPUT A

 

—Owner’s Manual

6

Front and rear panel

 

 

 

 

 

Channel controls

 

 

 

 

 

 

 

 

 

Mono input channels

 

 

 

 

26dB

 

Here are the 20 {12, 8} mono input channels of

 

 

 

1

the GF24/12 {GF16/12, GF12/12}. The input

 

GAIN

 

 

 

 

channel section processes the signal from the

 

 

 

 

2

 

+10

–34

input jacks of the connector section, and sends

 

 

–16

–60

 

the result to the GROUP buses, AUX buses, and

 

 

80

3

 

 

the ST bus.

 

 

 

 

 

 

 

 

4

PEAK

 

 

 

 

 

 

 

1 Pad switch

 

 

 

HIGH

 

 

 

 

 

 

 

 

 

This attenuates the input signal by 26 dB. The

 

 

–15

+15

 

pad is on when this switch is pressed in.

 

MID

 

 

 

 

 

 

 

 

 

 

2 GAIN control

 

 

 

 

250

5K

5

This adjusts the input sensitivity. The range of

 

 

 

 

 

 

 

 

 

levels that can be accommodated is –16 dB to

 

 

–15

+15

 

–60 dB when the pad switch (1) is off, and

 

LOW

 

 

+10 dB to –34 dB when the pad switch is on.

 

 

 

 

 

 

 

AUX

 

3 High pass filter switch

 

 

 

–15

+15

 

 

 

 

 

1 0

 

 

This is an on/off switch for the high pass filter

 

10

 

that cuts the frequency range below 80 Hz at a

 

 

 

PRE

 

 

 

 

 

 

 

 

 

slope of 12 dB/octave. The high pass filter is on

 

2 0

 

 

when the switch is pressed in.

 

 

10

 

4 PEAK indicator

 

 

 

 

 

 

 

 

3

 

PRE

 

This is an indicator that detects post-EQ clipping.

 

0

10

 

It will light 3 dB before clipping, indicating that

 

6

 

 

 

 

 

 

 

 

the signal is near the clipping level. If this LED

 

4 0

10

7

lights, lower the GAIN control (2).

 

 

 

 

 

5 EQ controls (HIGH/MID/LOW)

 

 

 

 

PRE

 

 

 

5 0

 

This is a three-band equalizer that boosts/cuts

 

10

 

 

 

 

 

 

 

 

 

 

 

each frequency band over a ± 15 dB range. The

 

6 0

10

 

center frequency and equalizer type for each

 

PAN

 

 

band is shown below.

 

 

 

L

R

8

 

Center

 

 

 

 

Band

Type

 

 

ODD

EVEN

 

frequency

 

 

 

 

9

 

 

 

 

 

 

 

 

 

 

 

ON

 

HIGH

10 kHz

shelving

 

 

10

 

MID

250 Hz–5 kHz

peaking

 

 

 

 

 

 

 

 

 

1–2

0

LOW

100 Hz

shelving

 

 

 

 

 

 

5

 

 

The response is flat when the knob is in the “

 

 

0

3–4

 

 

 

5

ST

A

position.

 

 

 

 

 

6 AUX controls (1–6)

 

 

 

 

 

 

 

 

 

10

 

These knobs adjust the level at which the input

 

 

15

 

 

 

 

channel signal is sent to the AUX buses 1–6. AUX

 

 

20

 

 

 

30

 

controls 1 and 2 are fixed at pre-fader, and AUX

 

 

40

B

 

 

 

PFL

controls 3–6 can be switched between pre/post

 

 

 

 

fader using the PRE switch (7). When a knob is

 

 

 

 

C

 

 

 

 

in the “” position, the level is “nominal”.

—Owner’s Manual

Channel controls

7

7PRE switches

These switches select whether the pre or post - fader signal will be sent to AUX buses 3–6. This setting is switched in pairs: AUX 3/4 and 5/6.

When the switch is pressed in, the pre-fader signal will be sent to the corresponding pair of AUX buses. When the switch is in the out (up) position, the post-fader signal will be sent.

8PAN control

This adjusts the left/right position at which the input channel signal will be sent to the ST (stereo) bus, GROUP bus 1/2, and GROUP bus 3/4.

9ON switch

This switches the input channel on/off. When this switch is turned off, the signal of the input channel will not be sent to the ST bus, GROUP buses, or AUX buses. However even if this switch is off, you can use the PFL switch (B) to monitor the signal from the C-R OUT jacks or the PHONES jack.

0Group select switches

These switches send the signal of the input channel to GROUP buses 1–4. When the 1–2 switch is on (pressed in) the signal will be sent to GROUP bus 1/2. When the 3–4 switch is on, the signal will be sent to GROUP bus 3/4.

AST (stereo) switch

This switch sends the signal of the input channel to the ST bus. When this switch is on, the signal will be sent to the ST bus.

BPFL (pre-fader listen) switch

This switch sends the pre-fader signal to the PFL/ AFL bus, allowing you to monitor it through headphones or monitor speakers. When this switch is on, the pre-fader signal of the input channel can be heard from the C-R OUT jacks and the PHONES jack, even if the ON switch (9) is off.

CChannel fader

This fader adjusts the input level of the input channel. The position of the channel fader will affect the level of the signal that is output from the ST bus, GROUP buses 1–4, and AUX buses 1– 6 (except when the PRE switch is on for AUX buses 3–6).

 

PHANTOM

 

 

 

 

 

 

 

 

 

 

 

 

 

 

GROUP

AUX PFL/AFL ST

 

 

 

 

 

 

 

1 2 3 4 1 2 3 4 5 6 L R L R

 

 

+48V

 

 

PEAK

 

 

 

 

PHANTOM

INSERT I/O

 

 

 

 

 

 

0dB

 

 

 

 

 

 

+48V

 

 

 

 

 

 

 

 

 

 

 

 

ST

 

 

 

 

 

 

 

 

 

INPUT A

PAD

HA

3 Stage EQ

 

 

1-2

 

1-20

 

HPF

 

 

 

PAN

 

 

 

80

 

 

 

 

 

 

 

 

 

 

 

 

{1-12}

 

 

 

ON

 

3-4

 

 

 

 

 

 

 

{1-8}

 

g

f

g

g

 

 

 

INPUT B

26dB

GAIN

MID

 

HIGH

 

 

 

 

 

LOW

 

 

AUX 1

 

 

 

 

 

 

 

 

AUX 2

 

 

 

 

 

 

 

 

AUX 3

 

 

 

 

 

 

 

PRE

AUX 4

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

AUX 5

 

 

 

 

 

 

 

PRE

AUX 6

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PFL

 

 

 

Mono input channel signal flow

—Owner’s Manual

8 Front and rear panel

4

6

A

B

GAIN

+10 –34

80

PEAK

HIGH

–15 +15

MID

–15

+15

LOW

 

–15

+15

 

AUX

1 0

PRE

10

2 0

10

3 0

PRE

10

4 0

10

5 0

PRE

10

6 0

10

BAL

 

L

R

ODD

EVEN

ON

10

1–2

5

0 3–4

5 ST

10

15

20

30

40

PFL

 

Stereo input channels

 

Here are the two stereo input channels provided

1

by the GF24/12, GF16/12, and GF12/12. The

INPUT 21/22 and 23/24 {13/14 and 15/16 on the

 

2

GF16, and 9/10 and 11/12 on the GF12/12} jacks

3

(6 and 0 of the connector section) are pairs of

connectors that let you control a stereo signal

using one input channel. If a cable is connected only to the INPUT A 21L or 23L jack {13L or 15L on the GF16/12, or 9L or 11L on the GF12/12}, the source will be controlled as a monaural signal.

51 A/B switch

This switch selects input jacks. When the switch is in the upward position () the input signal of the INPUT A jack is selected (page 18, 6 of the connector section). When the switch is in the downward section ( ), the input signal of the INPUT B jack is selected (0 of the connector section).

2GAIN control

This adjusts the input sensitivity. The range of levels that can be accommodated is +10 dB to –34 dB.

 

3 High pass filter switch

 

7

 

This is an on/off switch for the high pass filter

 

 

that cuts the frequency range below 80 Hz at a

 

 

slope of 12 dB/octave. The high pass filter is on

 

 

when the switch is pressed in.

 

 

4 PEAK indicator

 

 

 

8

 

This is an indicator that detects post-EQ clipping.

 

It will light 3 dB before clipping, indicating that

 

 

9

 

the signal is near the clipping level. If this LED

 

lights, lower the GAIN control (2).

 

 

5 EQ controls (HIGH/MID/LOW)

 

 

 

This is a three-band equalizer that boosts/cuts

0

 

each frequency band over a ± 15 dB range. The

 

 

center frequency and equalizer type for each

A

 

band is shown below.

 

 

 

 

 

 

 

 

 

Band

 

Center

 

Type

 

 

 

frequency

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

HIGH

 

10 kHz

 

shelving

 

 

 

 

 

 

 

B

 

MID

 

250 Hz

 

peaking

C

 

LOW

 

100 Hz

 

shelving

 

 

 

 

 

 

 

The response is flat when the knob is in the “

 

 

 

 

position.

 

 

 

—Owner’s Manual

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