Allen&Heath GS-R24M User Manual

USER GUIDE

Publication AP7784

Limited One Year Manufacturers Warranty

This product is warranted to be free from defects in materials or workmanship for period of one year from the date of purchase by the original owner. To ensure a high level of performance and reliability for which this equipment has been designed and manufactured, read this User Guide before operating. In the event of a failure, notify and return the defective unit to the place of purchase. If this is not possible then please contact the authorised ALLEN & HEATH distributor or agent in your country as soon as possible for repair under warranty subject to the following conditions.

Conditions of Warranty

The equipment has been installed and operated in accordance with the instructions in this User Guide. The equipment has not been subject to misuse either intended or accidental, neglect, or alteration other than as described in the User Guide or Service Manual, or approved by ALLEN & HEATH. Any necessary adjustment, alteration or repair has been carried out by an authorised ALLEN & HEATH distributor or agent. This warranty does not cover fader wear and tear. The defective unit is to be returned carriage prepaid to the place of purchase, an authorised ALLEN & HEATH distributor or agent with proof of purchase. Please discuss this with the distributor or the agent before shipping. If the unit is to be repaired in a different country to that of its purchase the repair may take longer than normal, whilst the warranty is confirmed and parts are sourced. Units returned should be packed to avoid transit damage. In certain territories the terms may vary. Check with your ALLEN & HEATH distributor or agent for any additional warranty which may apply.

If further assistance is required please contact Allen & Heath Ltd.

IMPORTANT- PLEASE READ CAREFULLY:

By using this Allen & Heath product and the software within it, you agree to be bound by the terms of the relevant End User Licence Agreement (EULA), a copy of which can be found on the Allen & Heath website in the product's pages. You agree to be bound by the terms of the EULA by installing, copying, or otherwise using the software.

This product complies with the European Electromagnetic Compatibility directive 2004/108/EC and the European Low Voltage Directive 2006/95/EC.

This product has been tested to EN55103 Parts 1 & 2 1996 for use in Environments E1, E2, E3, and E4 to demonstrate compliance with the protection requirements in the European EMC directive 2004/108/EC. During some tests the specified performance figures of the product were affected. This is considered permissible and the product has been passed as acceptable for its intended use. Allen & Heath has a strict policy of ensuring all products are tested to the latest safety and EMC standards. Customers requiring more information about EMC and safety issues can contact Allen & Heath.

NOTE: Any changes or modifications to the console not approved by Allen & Heath could void the compliance of the console and therefore the users authority to operate it.

GS-R24 User Guide AP7784 Issue 1

Allen & Heath Limited

Kernick Industrial Estate, Penryn, Cornwall, TR10 9LU, UK

http://www.allen-heath.com

Allen & Heath 3 GS_R24 User Guide

PACKED ITEMS

Check that you have received the following:

ST1

ST3

-5

GAIN

LINE

POL

HF

12k

Q

F

700

HM

G

Q

F

30

LM

G

80Hz

AUX

1

AUX

2

AUX

3

AUX

4

AUX

5

AUX

6

PAN

L-R

1-2

ABC

10

0

10

20

30

40

0 20

-15 +15

1k

400Hz

-15 +15

60

18Hz

-15 +15

-15LF+15

0.8

LR

30

0

40

20

-15 +15

1k

400Hz

-15 +15

60

18Hz

-15 +15

-15LF+15

0.8

LR

20

GAIN

50

6040-14 6

+48V

LINE

HPF

POL

100Hz

HF

12k

1

-15 +15

1

-15 +15

Q

0.8

6

2k

4k

1k

F

6k

700

6k

700

HM

18k

400Hz

G

1

-15 +15

Q

0.8

6

120

60

300

F

600

30

600

30

LM

1k

18Hz

G

-15 +15

80Hz

-15LF+15

EQ IN

AUX

1

+6

AUX

2

+6

AUX

3

+6

AUX

4

+6

Pre

AUX

5

+6

AUX

6

+6

PAN

LR

M

L-R

BUS

1-2

3-4

ABC

DAW

D

MUTE

SOLO/

SELECT

10

0

10

20

30

40

GAIN

50

6040-14 6

+48V

LINE

HPF

POL

100Hz

HF

12k

1

-15 +15

Q

0.8

6

2k

4k

1k

F

6k

700

HM

18k

400Hz

G

1

-15 +15

Q

0.8

6

120

60

300

F

600

30

LM

1k

18Hz

G

-15 +15

80Hz

-15LF+15

EQ IN

AUX

1

+6

AUX

2

+6

AUX

3

+6

AUX

4

+6

Pre

AUX

5

+6

AUX

6

+6

PAN

LR

M

L-R

BUS

1-2

3-4

ABC

DAW

D

MUTE

SOLO/

SELECT

10

0

10

20

30

40

50

6040-14 6

+48V

LINE

HPF

POL

100Hz

HF

12k

1

-15 +15

1

-15 +15

Q

0.8

6

2k

4k

1k

F

6k

700

6k

700

6k

HM

18k

400Hz

G

1

-15 +15

Q

0.8

6

120

60

300

F

600

30

600

30

600

LM

1k

18Hz

G

-15 +15

80Hz

-15LF+15

EQ IN

AUX

1

+6

AUX

2

+6

AUX

3

+6

AUX

4

+6

Pre

AUX

5

+6

AUX

6

+6

PAN

LR

M

L-R

BUS

1-2

3-4

ABC

DAW

D

MUTE

SOLO/

SELECT

10

0

10

20

30

40

LINE

POL

HF

12k

Q

F

700

HM

G

Q

F

30

LM

G

80Hz

AUX

1

AUX

2

AUX

3

AUX

4

AUX

5

AUX

6

PAN

L-R

1-2

ABC

10

0

10

20

30

40

-15 +15

1k

400Hz

-15 +15

60

18Hz

-15 +15

-15LF+15

0.8

LR

GAIN

50

6040-14 6

+48V

LINE

HPF

POL

100Hz

HF

12k

1

-15 +15

Q

0.8

6

2k

4k

1k

F

6k

700

6k

700

HM

18k

400Hz

G

1

-15 +15

Q

0.8

6

120

60

300

F

600

30

600

30

LM

1k

18Hz

G

-15 +15

80Hz

-15LF+15

EQ IN

AUX

1

+6

AUX

2

+6

AUX

3

+6

AUX

4

+6

Pre

AUX

5

+6

AUX

6

+6

PAN

LR

M

L-R

BUS

1-2

3-4

ABC

DAW

D

MUTE

SOLO/

SELECT

10

0

10

20

30

40

20

GAIN

LINE

POL

HF

12k

-15 +15

Q

0.8

1k

F

700

HM

400Hz

G

-15 +15

Q

0.8

60

F

30

LM

18Hz

G

-15 +15

80Hz

-15LF+15

AUX

1

AUX

2

AUX

3

AUX

4

AUX

5

AUX

6

PAN

LR

L-R

1-2

ABC

10

0

10

20

30

40

GAIN

50

6040-14 6

+48V

LINE

HPF

POL

100Hz

HF

12k

1

-15 +15

Q

0.8

6

2k

4k

1k

F

6k

700

6k

700

HM

18k

400Hz

G

1

-15 +15

Q

0.8

6

120

60

300

F

600

30

600

30

LM

1k

18Hz

G

-15 +15

80Hz

-15LF+15

EQ IN

AUX

1

+6

AUX

2

+6

AUX

3

+6

AUX

4

+6

Pre

AUX

5

+6

AUX

6

+6

PAN

LR

M

L-R

BUS

1-2

3-4

ABC

DAW

D

MUTE

SOLO/

SELECT

10

0

10

20

30

40

50

6040-14 6

+48V

HPF

100Hz

6

4k

6k

18k

6

300

600

1k

+6

M

3-4

D

MUTE

SOLO/ SELECT

20

-15 +15

1k

400Hz

-15 +15

60

18Hz

-15 +15

-15LF+15

0.8

LR

0

40

20

GAIN

50

6040-14 6

+48V

LINE

HPF

POL

100Hz

HF

12k

1

-15 +15

Q

0.8

6

2k

4k

1k

F

6k

700

6k

700

HM

18k

400Hz

G

1

-15 +15

Q

0.8

6

120

60

300

F

600

30

600

30

LM

1k

18Hz

G

-15 +15

80Hz

-15LF+15

EQ IN

AUX

1

+6

AUX

2

+6

AUX

3

+6

AUX

4

+6

Pre

AUX

5

+6

AUX

6

+6

PAN

LR

M

L-R

BUS

1-2

3-4

ABC

DAW

D

MUTE

SOLO/

SELECT

10

0

10

20

30

40

30

0

40

20

GAIN

50

6040-14 6

+48V

LINE

HPF

POL

100Hz

HF

12k

1

-15 +15

1

-15 +15

Q

0.8

6

2k

4k

1k

F

6k

700

6k

700

HM

18k

400Hz

G

1

-15 +15

Q

0.8

6

120

60

300

F

600

30

600

30

LM

1k

18Hz

G

-15 +15

80Hz

-15LF+15

EQ IN

AUX

1

+6

AUX

2

+6

AUX

3

+6

AUX

4

+6

Pre

AUX

5

+6

AUX

6

+6

PAN

LR

M

L-R

BUS

1-2

3-4

ABC

DAW

D

MUTE

SOLO/

SELECT

10

0

10

20

30

40

-5

-10

40

LEV

0

-20

50

5

-30

10

OO

10

OO

6040-14 6

+48V

To LR

To CH

HPF

100Hz

SIP SAFE SIP SAFE

ST2

ST4

-5

-10

LEV

0

-20

6

5

-30

4k

10

OO

10

OO

6k

HF

18k

12k

-15 +15

2k5

6

-15HM+15

300

600

250Hz

1k

-15LM+15

80Hz

-15LF+15

EQ IN

AUX

1

+6

SOLO/ SELECT

+6

AUX

2

+6

AUX

3

+6

AUX

4

+6

Pre

AUX

5

+6

AUX

6

+6

BAL

LR

M

3-4

D

M

L-R

BUS

1-2

3-4

SEND=

POST EQ

DAW

I/P=DAW

MUTE

SOLO/

SELECT

10

0

10

20

30

40

I/P = DAW

INST

+48V

BOOST

POL

INST INST

30

0

40

20

GAIN

50

6040-14 6

MIN MAX

Drive

Valve

Channel 1

-5

LEV

-10

0

-20

5

-30

10

PAN

LR

L-R

M

BUS

1-2

3-4

AFL

AUX1

AUX2 AUX4

+60+60+6

AFL

AFL AFL AFL AFL AFL

L-R

M

=

PAN

L R

PK!

+6

0

SIG

1

MUTE

AFL

10

0

10

20

30

40

0 20

MIN MAX

Channel 2

-10

-20

-30

AUX3

PAN

MUTE

AFL

10

0

10

20

30

40

L R

30

Drive

Valve

-5

LR

=

I/P = DAW

+48V

BOOST

40

50

6040-14 6

0

5

10

M

BUS

3-4

AFL

0

+6

L-R

M

=

PAN

L R

PK!

+6

0

SIG

1

MUTE

AFL

10

0

10

20

30

40

LEV

-20

-30

AUX5

0

STUDIO

-10

OFF = SEL MODE

1

Aux 1

+6

Aux 2

+6

5-6

Aux 3/5

+6

Aux 4/6

+6

Stereo

Grp 1-2

+6

Stereo

Grp 3-4

+6

Stereo

L-R

+6

M

+6

-5

LEV

0

5

10

AFL

0

+6

SOLO MODE

PFL MODE

AFL MODE

ADD MODE

SOLO CLEAR

GS-R24M GS-R24

READ

WRITE

MIDI FADER MODE

OFF = NO FADER MIDI

10

0

10

20

30

40

POWER

+16

STUDIO

2

ALLEN&HEATH

+9 +6

Aux 1

+3

0

-3

-6

+6

-9

-12

Aux 2

-16

-20

-30

+6

L

R

PFL/AFL ACTIVE

5-6

Aux 3/5

+6

Aux 4/6

+6

Stereo

Grp 1-2

+6

Stereo

Grp 3-4

+6

Stereo

L-R

+6

M

+6

-5

-10

0

-20

5

-30

10

AFL

AUX6

0

+6

SIP

MONO CH

MIDI ENABLEDMOTOR FADERS

MONO O/P

2 TO 1

2 TRACK DUB

1 TO 2

2 TRACK 1 REPLACE L-R

MIN MAX

TO STUDIO

TO AUX 1 & 2

TO AUX 3 & 4

TO GROUPS

PHONES LEVEL

MIN MAX

2 TRACK 1

2 TRACK 2

DIG MASTER

MONO

CRM LEVEL L-R/5.1

MIN MAX

MONO L-R

ALT SPKRS

DIM L-R

DIG MASTER INPUT

MIN MAX

L-R

GTS STOP PLAY RECGTE

PHONES

MIDI

1

127

TALK LEV

TALK

O

MAIN MIX L-R

SPKRS

17-24=AUX+GRP

A: DAW SEND B: INS SOURCE

5.1 SURROUND

C: FDR SOURCE

SHIFT

10

0

10

20

30

40

127

ROUTING KEY:

D: FADER

30

0

40

20

GAIN

LINE

POL

HF

12k

1

-15 +15

Q

0.8 2k

1k

F

700

MIDI

2

HM

400Hz

G

-15 +15 1

Q

0.8 120

60

F

30

LM

18Hz

G

-15 +15

O

80Hz

-15LF+15

EQ IN

AUX

1

AUX

2

AUX

3

AUX

4

Pre

AUX

5

AUX

6

PAN

LR

L-R

BUS

PRE INS / POST EQ

=

1-2

MICLINE / DAW

=

ABC

MICLINE / DAW

=

ACTIVE / BYPASS

=

DAW

MUTE

10

0

10

20

30

40

20

GAIN

LINE

POL

HF

12k

Q

F

700

HM

G

Q

F

30

LM

G

80Hz

AUX

1

AUX

2

AUX

3

AUX

4

AUX

5

AUX

6

PAN

L-R

1-2

ABC

10

0

10

20

30

40

-15 +15

1k

400Hz

-15 +15

60

18Hz

-15 +15

-15LF+15

0.8

LR

GAIN

50

6040-14 6

+48V

LINE

HPF

POL

100Hz

HF

12k

1

-15 +15

Q

0.8

6

2k

4k

1k

F

6k

700

6k

700

HM

18k

400Hz

G

-15 +15

1

Q

0.8

6

120

60

300

F

600

30

600

30

LM

1k

18Hz

G

-15 +15

80Hz

-15LF+15

EQ IN

AUX

1

+6

AUX

2

+6

AUX

3

+6

AUX

4

+6

Pre

AUX

5

+6

AUX

6

+6

PAN

LR

M

L-R

BUS

1-2

3-4

ABC

DAW

D

MUTE

SOLO/

SELECT

10

0

10

20

30

40

50

6040-14 6

+48V

HPF

100Hz

6

4k

6k

18k

6

300

600

1k

+6

M

3-4

D

SOLO/ SELECT

20

-15 +15

1k

400Hz

-15 +15

60

18Hz

-15 +15

-15LF+15

0.8

LR

0

40

20

GAIN

50

6040-14 6

+48V

LINE

HPF

POL

100Hz

HF

12k

1

-15 +15

Q

0.8

6

2k

4k

1k

F

6k

700

6k

700

HM

18k

400Hz

G

-15 +15

1

Q

0.8

6

120

60

300

F

600

30

600

30

LM

1k

18Hz

G

-15 +15

80Hz

-15LF+15

EQ IN

AUX

1

+6

AUX

2

+6

AUX

3

+6

AUX

4

+6

Pre

AUX

5

+6

AUX

6

+6

PAN

LR

M

L-R

BUS

1-2

3-4

ABC

DAW

D

MUTE

SOLO/

SELECT

10

0

10

20

30

40

30

0

40

20

GAIN

50

6040-14 6

1

6

2k

4k

18k

1

6

120

300

600

1k

EQ IN

+6

Pre

+6

BUS

DAW

MUTE

SOLO/ SELECT

50

6040-14 6

+48V

LINE

HPF

POL

100Hz

HF

12k

1

-15 +15

1

-15 +15

Q

0.8

6

2k

4k

1k

F

6k

700

6k

700

6k

HM

18k

400Hz

G

-15 +15

1

Q

0.8

6

120

60

300

F

30

600

30

600

LM

1k

18Hz

G

-15 +15

80Hz

-15LF+15

EQ IN

AUX

1

+6

AUX

2

+6

AUX

3

+6

AUX

4

+6

Pre

AUX

5

+6

AUX

6

+6

PAN

LR

M

L-R

BUS

1-2

3-4

ABC

DAW

D

MUTE

SOLO/

SELECT

10

0

10

20

30

40

GS-R24 MIXER

Also Packed in the box

• Safety Instructions—English

• Safety Instructions—French

• Addendum note ROHS

• Sticker

• This User Guide

PACKED SEPARATELY ARE THE POWER SUPPLY AND INTERFACE MODULE

Allen & Heath 4 GS_R24 User Guide

CONTENTS

Thank you for purchasing your Allen & Heath GS-R24. To ensure that you get the maximum benefit from the unit please spare a few minutes familiarizing yourself with the controls and setup procedures outlined in this user guide. For further information please refer to the additional information available on our web site, or contact our technical support team.

http://www.allen-heath.com

This User Guide does not cover the interface modules available for the GS-R24. The varied modules will have their own User Guide and details of software drivers, digital connectivity and computer related issues. Also see the website for details.

Warranty ........................................................... 3

Packed Items..................................................... 4

Contents............................................................ 5

Introduction to GS-R24....................................... 6

Dimensions & Weights........................................ 7

Specifications..................................................... 8

Block Diagram.................................................... 10

Mono Input Channel........................................... 11

Stereo Input Channel.......................................... 16

Valve Input Channel ........................................... 20

Aux Masters....................................................... 22

Groups............................................................... 23

Studio Outputs................................................... 24

Main 2 Track Input & Output connectors.............. 25

Master Section ................................................... 26

Monitoring modes............................................... 27

17-24 = Aux/Grp & 5.1 Surround switches........... 28

Meterbridge ....................................................... 29

MIDI Control—Modes of Operation...................... 30

Fader Touch Sensors.......................................... 30

MIDI Controllers................................................. 31

MIDI Implementation ......................................... 32

Power Up Configuration Modes............................ 35

Connection Diagram (Basic)................................ 36

Mono Input Channel Workflow Options................ 37

Internally set Option Jumper Links ...................... 40

Wiring diagrams for audio leads……..................... 41

Product Support ................................................. 42

Allen & Heath 5 GS_R24 User Guide

INTRODUCTION TO THE GS-R24

A Technical Overview:

The Allen & Heath GS-R24 mixer has been carefully and lovingly designed in the beautiful county of Cornwall in the UK and is manufactured alongside a wide range of professional audio mixing consoles. Allen & Heath has a long history of making classic recording mixers such as the Sigma, Syncon, System 8, Saber and the GS3000, but for a few years have concentrated on the live sound, installation and pro DJ markets. The GS-R24 resurrects the GS product line and stands as a classic recording console for the modern age of Digital Audio Workstation software. We spent a long time examining how modern recording methods, equipment and software applications have changed the way musicians and sound engineers work and listening to ideas and requests on forums such as Gearslutz, we have created a product which offers more than a sum of its parts—a combination of not just different technology, but different methods and philosophies.

GS-R24 is designed to fulfil the needs of musicians, sound engineers and producers and is adaptable to different workflow methods. Briefly, some of the capabilities of the GS-R24 include:

• Multi-track recording to the digital domain with easy interfacing to a computer DAW with zero latency monitoring of live sources.

• Multi-track recording to the digital domain with monitoring sourced from the recorded track in the DAW.

• Over-dubbing a recorded track whilst monitoring the track and/or live source.

• Multi-track mixdown using state-of-the-art analogue summing techniques.

• Multi-track mixing performed in the DAW using the GS-R24 as a controller.

• Patching, routing and monitoring a comprehensive matrix of signals in a studio environment—artists monitors, effects

processors, external devices and studio control room monitors.

• Surround sound mixes can be created in a DAW and conveniently monitored through a single level control.

• Automating a mix using the motorised faders on GSR-24M to either create an automated mix in the digital domain or

create an automated analogue summing mix using the faders for channel level control as well as parameter control.

Our claim that the GS-R24 is a modern classic recording console is not without foundation. It is a progression of our in-line recording mixers, many regarded as “classics” but with interfacing to each channel provided by a Digital Audio Workstation. Actually, the GS-R24 isn’t just designed for modern times—it is built with the future in mind, with the interfacing hardware housed in a removable module which can be swapped and updated over time. This means that you won’t have to change your lovely console when you need to upgrade your digital interfacing technology years from now.

The GS-R24 is built utilising individual vertically mounted channel circuit boards with each rotary control fixed with a metal nut to the front panel. This provides a very robust product that will resist damage and give years of reliable use. It also makes servicing easier should it be required. The motor fader system can be removed separately to the rest of the system and faders can be changed individually if the are damaged (from top impact for example).

Mic/Line Pre-amps:

The ultimate performing pre-amps are fitted to GS-R24. Similar in topology to those used in the renowned ZED-R16, they comprise a symmetrical circuit with individual linearising feedback to both phases, along with the lowest noise transistors available, providing very low distortion over a wide bandwidth and extremely low noise which translates to superior clarity and dynamic range.

EQ:

Extremely powerful, flexible and fully implemented mono channel EQ. Parametric mid sections with extended frequency range and controllable Q- factor allow a huge range of corrective and creative possibilities.

MIDI Control:

We have developed the control aspect on GS-R24 to give an intuitive, flexible, easy way to control multiple parameters in a variety of DAWs. Each of the mono channel faders has MIDI capability and are motorised on GS-R24M. In addition there is a MIDI Select switch on each channel and in the MIDI controller section 2 x 60mm faders, 12 x rotaries, 14 switches plus transport controls and a jogwheel.

Interface Modules:

The interface module fits in the rear panel of the console. It handles 32 channels in and 32 channels out plus the control protocol. This manual does not cover the details of the modules as the variety of modules available will change in the future. Please consult the A&H website for details and the User Guide for the individual modules.

Allen & Heath 6 GS_R24 User Guide

DIMENSIONS & WEIGHTS

613mm (24.1”)

1125mm (44.3”)

9

7

.

0

192mm (7.5”)

°

616mm (24.25”)

Weight kg (lb)

Unpacked Packed

GS-R24 30 (66) 38 (84)

GS-R24M 38 (84) 40 (88)

Allen & Heath 7 GS_R24 User Guide

GS-R24 SPECIFICATIONS

Operating Levels

Inputs

Mono channel (XLR) Input -6 to –60dBu for nominal (+14dBu in max) Mono channel Line Input (Jack socket) +14 to –40dBu (+34dBu maximum) Insert point (TRS Jack socket) 0dBu nominal +21dBu maximum

Stereo Input (Jack sockets) 0dBu nominal (control = Off to +10dB) Stereo input (phono sockets) 0dBu nominal (control = Off to +15dB) Valve channel (XLR) -10 to –60dBu for nominal (+10dBu max) Valve channel (Line) +10 to –40dBu for nominal (+30dBu maximum) Valve channel (Inst gain boosted) -16 to –66dBu for nominal (122mV to 0.388mV rms) 2 Track Input (phono or TRS jack sockets) 0dBu nominal +21dBu maximum

Outputs Main (2 Track 1) L-R (XLR) & Groups 1-4 (TRS Jack) +4dBu nominal. +27dBu maximum. L-R Insert & Group Inserts (TRS Jack socket) 0dBu nominal +21dBu maximum 2 Track 2 Outputs (Jack sockets) 0dBu nominal. +21dBu maximum. All other analogue outputs 0 nominal +21dBu maximum

Headroom Analogue headroom from nominal (0Vu) 21dB Analogue headroom at Mix summing amplifier 23dB

Frequency Response Mic in to Mix L/R Out, 10dB gain +/-1dB 10Hz to 130kHz. Mic in to Mix L/R Out, 30dB gain +/-0.5dB 20Hz to 80kHz. Mic in to Mix L/R Out, 50dB gain +/-1dB 20Hz to 80kHz. Line in to Mix L/R out 0dB gain +/-0.5dB 20Hz to 20kHz Stereo in to Mix L/R out +/-0.5dB 20Hz to 40kHz

THD+n Mic in to Mix L/R Out, 10dB gain 1kHz +10dBu out (DC to 22kHz) 0.0015% Mic in to Mix L/R Out, 30dB gain 1kHz (DC to 22kHz) 0.0025% Mic in to Mix L/R Out, 50dB gain 1kHz (DC to 22kHz) 0.0035%

Mic in to Mix L/R Out, 30dB gain 10kHz (DC to 30kHz) 0.0025% Line in to Mix L/R out 0dB gain +10dBu 1kHz (DC to 22kHz) 0.002% Stereo in to Mix L/R out 0dB gain +10dBu 1kHz (DC to 22kHz) 0.002%

Allen & Heath 8 GS_R24 User Guide

GS-R24 SPECIFICATIONS

Noise Mono ch Mic Pre EIN @ 60dB gain 150R input Z 22-22kHz -128.5dBu Mono ch Mic Pre EIN @ 30dB gain 150R input Z 22-22kHz -124dBu Mix Noise, LR out, 0 channels routed, Ref +4dBu, 22-22kHz -97dB (-93dBu) Mix Noise, LR out, 12 channels routed, Ref +4dBu, 22-22kHz -90dB (-86dBu) Mix Noise, LR out, 24 channels routed, Ref +4dBu, 22-22kHz -89dB (-85dBu) Mix Noise, Aux 1-4 out, sends minimum, masters at unity 22-22kHz -84dBu Mix Noise, Groups 1-4, 24 channels routed, Ref +4dBu, 22-22kHz -89dB (-85dBu)

Power consumption Motorised Fader model 170W Nominal 300W Max Power consumption non-Motorised Fader model 170W

Weight GS-R24 unpacked/packed 30/38kg Weight GS-R24m unpacked/packed 32/40kg

Allen & Heath 9 GS_R24 User Guide

BLOCK DIAGRAM

INSTRUMENT

/LINE LEVEL

GROUP 4

STEREO 1 L

STEREO 1 R

STEREO 2 L

STEREO 2 R

VALVE 1

VALVE 2

MASTER L

MASTER R

CHANNEL 1

CHANNEL 8

CHANNEL 9

CHANNEL 16

17-24 = AUX-GROUP

CHANNEL 17

Hi Z

AUX 1

CHANNEL 18

AUX 2

CHANNEL 19

AUX 3

CHANNEL 20

AUX 4

CHANNEL 21

GROUP 1

CHANNEL 22

GROUP 2

CHANNEL 23

GROUP 3

CHANNEL 24

MIC IN

PHANTOM POWER SWITCH

ST1 & 2 JACK

ST1 & 2 RCA

LINE IN

MIC IN

PHANTOM POWER SWITCH

GAIN BOOST

VALVE CHANNEL

RECORDING

INTERFACE

CLASS A

HI-Z DI

FET

+

-

SOURCE = DAW

+48V

Line Invert

GAIN

MIDI

RECORDING

INTERFACE

VALVE

STAGE

SOLID

STATE

STAGE

METER LED

BLEND

DRIVE

MASTER R

LEVEL

CHANNEL 1

CHANNEL 8

CHANNEL 9

CHANNEL 16

CHANNEL 17

CHANNEL 24

STEREO 1 L

STEREO 1 R

STEREO 2 L

STEREO 2 R

VALVE 1

VALVE 2

MASTER L

INSERT

TALKBACK

MIC

GAIN

MIDI CONTROLLER PROCESSOR

MIDI FADERS + ROTARIES + SWITCHES

LOGIC CONTROL FOR

SOLO MODES & MIDI

PFL

AFL

ADD

SOLO-IN-PLACE

INTERFACE I/P CH 25-30

SURROUND

-20dB

-20dB DIM

ALT

SURROUND ONLY

ALTERNATE SPEAKERS

CENTRE

SUB BASS

LEFT

RIGHT

TALK

STUDIO AUX 1 - 2

AUX 3 - 4 GROUPS

SOLO MODE

MONITORS LEVEL

CONTROL ROOM MONITORS

LEFT

RIGHT

DIRECT OUT

TALK TO STUDIO

AFL L

AFL R

1-2

3-4

MONO POSTFADE

DIGITAL MASTER IN

L-R POSTFADE

2 TRACK 2 IN

2 TRACK 1 IN

AFL

PFL

+

MONO

PHONES

LEVEL

PAN

L-R

LR

AUX 5-6 PRE/POST

SELECT

AUX 5

AUX 4

AUX 6

MONO

TALK TO

STUDIO

STEREO STEREO

STEREO

AFL

STUDIO OUT

LEVEL

STUDIO OUT L

STUDIO OUT R

DACADC

METER BAR

PRE FADER MONO

+

POST FADER MONO

PRE

LOGIC CONTROL

AUX 1

AUX 3

AUX 2

AUX 1 AUX 2

AUX 3 AUX 5

AUX 4 AUX 6

GRP 1-2 GRP 3-4

GRP 2

L-R POSTFADE M POSTFADE

L-R

M

COPY FOR 2-6

SOLO/SELECT

SOLO LOGIC

POST FADER MONO

MIDI SELECT

AFL R

AFL

AUX 1

+6dB

AUX1 OUT

R

L

R

L

GAIN

+

-

DIGITAL SEND

A

+

SOURCE = DAW

MIX L

MIX R

POST-EQ

100Hz

B

STEREO CHANNEL

LF

gg

4 BAND EQUALISER

LMF HF

HMF

gg

EQ

IN

SOFT MUTE

MUTE

FADER

+

PRE FADER MONO

PFL

AFL L

1-2

3-4

GROUP INSERT

TIP SEND

AFL

MONO

L-R

COPY FOR 2-6

GROUP 1 OUT

SELECT

+

CHANNEL

METER

AUX 6

+

BAL

MONO

L-R

TIP SEND

GROUP 1

+10dB

MUTE

GROUP METER

RECORDING

INTERFACE

MONO CHANNEL

DACADC

SELECT

PRE FADER

POST FADER

AUX 5-6 PRE/POST

PRE

LOGIC CONTROL

SOLO LOGIC

TO MIDI CPU

MIDI DATA

FADER OUTPUT

POSTFADER

AUX 1

AUX 3

AUX 5

AUX 2

AUX 4

MIDI SELECT

AFL R

2 TRK 2 IN

2 TRK 1 IN

R

MONO INSERT

+10dB

MONO

L-R POSTFADE

MONO OUT

L

+-+

-

DUB 1-2

-2dBu NOMINAL UNBALANCED

RIGHT

LEFT

2TRK 2 OUT

INSERT

LF

ggfqgfqg

4 BAND PARAMETRIC EQUALISER

LM

HM

HF

PREFADE

SOLO/SELECT

CONTROL

IN

SOFT MUTE

FADER

BYPASS

D

PFL

AFL L

3-4

L INSERT

R INSERT

TIP SEND

MAIN LR

+10dB

DUBBING

DUB 2-1

+4dBu NOMINAL

BALANCED

MAIN (2TRK 1) OUT

LEFT

RIGHT

+48V

Line Invert

GAIN

HPF

DIGITAL SEND

A

DIGITAL RETURN

PRE-INSERT

POST-EQ

EQ

C

MUTE

PRE-MUTE

FADER

PAN

L-R

1-2

POST-EQ

RECORDING

INTERFACE

DACADC

DIGITAL RETURN

POST-EQ

CHANNEL METER

FADER OUTPUT

POSTFADER

PRE-MUTE

POST-EQ

DIRECT OUT

MONO

MAIN MIX L MAIN MIX R MONO MIX GROUP 1 GROUP 2 GROUP 3 GROUP 4

AUX 1 AUX 2 AUX 3 AUX 4 AUX 5 AUX 6 PFL

AFL L AFL R

DIGITAL MASTER

LEVEL

REPLACE L-R

2 TRACK 1

RECORDING

INTERFACE

DACADC

DIGITAL MASTER IN

MAIN MIX L-R VU METERS

VU VU

Allen & Heath 10 GS_R24 User Guide

MONO INPUT CHANNEL

REAR PANEL CONNECTIONS

T

DIRECT OUT

Direct Output Jack Socket

Standard 1/4” (6.25mm) Jack socket for Channel output signal. Wired Tip=Hot(+), Ring=Cold(0V), Sleeve=Chassis. Nominal level is 0dBu. The source for the Direct Output is selectable by option jumpers internally, factory set to Pre-Fade.

T

INSERT

Insert Jack Socket

Standard 1/4” (6.25mm) Jack socket for unbalanced insert send and return signals. Wired Tip=send, Ring=return, Sleeve=Chassis. Nominal level is 0dBu. The insert point is after the 100Hz filter and before the EQ.

Line Input Jack Socket

LINE

MIC

Standard 1/4” (6.25mm) Jack socket for balanced or unbalanced line level signals. Wired Tip=Hot(+), Ring=cold (-), Sleeve=Chassis.

Microphone Input Socket

Standard 3-Pin XLR socket wired as Pin 1=Chassis, Pin 2=hot (+), Pin 3=Cold (-).

FRONT PANEL CONTROLS

Gain Control

M1

This adjusts the gain of the input amplifier to match the signal level of the input. The gain is varied from +6dB to +60dB for signals plugged in to the xlr socket (Mic Input) and –14dB to +40dB for signals plugged into the Line input jack.

20

30

40

50

Line Input Switch

Selects the source for the pre-amp from XLR to Line input jack. The balanced input signal is padded by 20dB but noise and distortion are kept to a minimum in order to make it transparent when connecting external devices.

0

GAIN

48V Phantom Power Switch

LINE

60 40-14 6

+48V

Applies +48V to pins 2 and 3 of the XLR input though 6k8 resistors for phantom powered condenser microphones.

Polarity (phase) reverse switch

Reverses the polarity of the balanced input signal phases for both mic XLR and Line jack inputs.

POL

100Hz Hi-pass Filter

The Hi-pass filter is used for reducing pop noise and rumble from microphone signals. It is a 2-pole (12dB per octave) filter with a corner frequency set at just below 100Hz. The filter affects signals from both Mic XLR and Line jack socket.

Allen & Heath 11 GS_R24 User Guide

HPF

100Hz

dBr

0.00

-5.00

-10.00

-15.00

-20.00

-25.00

-30.00

-35.00

-40.00

10.00 Hz 100.00 1000.00 10000.00 40000.00

GAIN

MONO INPUT CHANNEL

Pre-Amp performance notes

30

0

20

40

50

60 40-14 6

The GS-R24 pre-amp is a highly developed and proven design. Originally evolved from a balanced summing amplifier circuit originally designed back in the late 1980s for the Focusrite Forte console whilst working for industry legend Rupert Neve. Very low noise transistors are employed in a symmetrical topology with local phase compensation resulting in an inherently stable but wide bandwidth, low distortion, very low noise design.

LINE

POL

HF

12k

Q

HM

F

700

G

1k

400Hz

1

-15 +15

0.8

6

2k

18k

-15 +15

1

+48V

1.00000

THD+n plots of pre-amp

HPF

100Hz

0.10000

0.01000

at 10, 20, 30 and 40dB gain showing uniformity of distortion performance over a wide range of gain

0.00100

%

0.00010

10.00 Hz 100.00 1000.00 10000.00

settings.

HF EQ

The HF (High Frequency) equaliser affects the frequency response of the higher audible frequencies. The corner frequency of 12kHz is around 3dB from the maximum cut or boost of the circuit.

4k

6k

dBr

20.00

15.00

10.00

5.00

0.00

-5.00

-10.00

-15.00

-20.00

10.00 Hz 100.00 1000.00 10000.00 40000.00

Q

HMF EQ

0.8

60

F

30

120

6

300

600

The HMF (High Mid Frequency) equaliser affects the upper middle of the audible frequency range. The frequency graduations on the sweep control are the centre frequencies of the EQ. The Q factor is the width of the equaliser curve and is variable from a wide 0.8 to a sharp 6.

LM

18Hz

G

-15 +15

LF

80Hz

-15

1k

+15

dBr

20.00

15.00

10.00

5.00

0.00

-5.00

-10.00

-15.00

-20.00

10.00 Hz 100.00 1000.00 10000.00 40000.00

EQ IN

Allen & Heath 12 GS_R24 User Guide

MONO INPUT CHANNEL

LMF EQ

HF

12k

-15 +15

1

The LMF (Low Mid Frequency) equaliser affects the lower middle of the audible frequency range. The frequency graduations on the sweep control are the centre frequencies of the EQ. As with the HMF section, the Q factor is variable from 0.8 to 6. The graph shows the Q setting in the minimum, and maximum positions, and the extents of the frequency range.

Q

1k

F

700

HM

400Hz

G

-15 +15

Q

60

F

30

LM

18Hz

G

-15 +15

LF

80Hz

-15

0.8

2k

1

120

6

18k

6

1k

+15

4k

300

6k

600

dBr

20.00

15.00

10.00

5.00

0.00

-5.00

-10.00

-15.00

-20.00

10.00 Hz 100.00 1000.00 10000.00 40000.00

LF EQ

The LF (Low Frequency) equaliser affects the frequency response of the lower audible (bass) frequencies. The corner frequency of 60Hz is around 3dB from the maximum cut or boost of the circuit.

dBr

20.00

15.00

10.00

5.00

0.00

-5.00

-10.00

-15.00

-20.00

10.00 Hz 100.00 1000.00 10000.00 40000.00

EQ IN

The EQ IN switch enables the equaliser when pushed in. The EQ is bypassed when the switch is in its up position.

Allen & Heath 13 GS_R24 User Guide