Neve 8424 User manual

8424
User Manual
Issue 1

2
Health & Safety Notice
FOR YOUR OWN SAFETY AND FOR THE PROTECTION OF OTHERS
PLEASE OBSERVE THE FOLLOWING HEALTH AND SAFETY INSTRUCTIONS
•READ THESE INSTRUCTIONS AND KEEP THEM HANDY
•HEED ALL SAFETY WARNINGS
•DO NOT USE NEAR WATER
•CLEAN ONLY WITH A DRY CLOTH
•DO NOT INSTALL NEAR HEAT SOURCES
•DO NOT BLOCK VENTILATION OPENINGS
•PROTECT THE POWER CORD
•USE ONLY ACCESSORIES SPECIFIED BY THE MANUFACTURER
•UNPLUG WHEN UNUSED FOR LONG PERIODS OF TIME
•MODULES OR CARDS SHOULD NOT BE INSERTED OR REMOVED WITH THE
POWER ON
•REFER ALL SERVICING TO QUALIFIED PERSONNEL ONLY
•NO USER SERVICEABLE PARTS INSIDE
•PLEASE OBSERVE THE RECOMMENDED 'POWER UP' & 'POWER DOWN'
PROCEDURES
FAILURE TO OBSERVE THESE PROCEDURES AND RECOMMENDATIONS
WILL INVALIDATE THE MANUFACTURER’S WARRANTY

3
Important Safety Instructions
Read these instructions
Keep these instructions
Heed all warnings
Follow all instructions
Do not use this apparatus near water
Clean only with a dry cloth
Do not block any ventilation openings.
Install in accordance with the manufacturer's
instructions.
Do not install near any heat sources such as radiators,
heat registers, stoves or other apparatus (including
amplifiers) that produce heat.
Do not defeat the safety purpose of the polarized or
grounding-type plug.
A polarized plug has two blades and a third grounding
prong.
The wide blade or the third prong are provided for your
safety.
If the provided plug does not fit into your outlet, consult an
electrician for replacement of the obsolete outlet.
As this apparatus is constructed to Class I, it shall be
connected to a MAINS socket outlet with protective
earthing connection.
Protect the power cord from being walked on or
pinched particularly at plugs, convenience receptacles, and
the point where they exit the apparatus.
Where the MAINS plug or an appliance coupler is used as
the disconnect device, the disconnect device shall remain
readily operable.
Only use attachments / accessories specified by the
manufacturer.
CAUTION Use only with the optional 8424 cart/stand
specified by AMS Neve, or sold with the apparatus. When a
cart is used, use caution when moving the cart / apparatus
combination to avoid injury from tip-over. Use with other
equipment may result in instability causing injury.
Unplug this apparatus during lightning storms or when
unused for long periods of time.

4
Refer all servicing to qualified service personnel.
Servicing is required when the apparatus has been
damaged in any way, such as power-supply cord or plug is
damaged, liquid has been spilled, or objects have fallen into
the apparatus, the apparatus has been exposed to rain or
moisture, does not operate normally or has been dropped.
WARNING:
TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE THIS
APPARATUS TO RAIN OR MOISTURE.
WARNING:
THIS APPARATUS HAS CLASS I CONSTRUCTION AND SHALL BE CONNECTED TO A
MAINS SOCKET OUTLET WITH A PROTECTIVE EARYTHING CONNECTION.
WARNING:
WHERE THE MAINS PLUG OR AN APPLIANCE COUPLER IS USED AS THE DISCONNECT
DEVICE, THE DISCONNECT DEVICE SHALL REMAIN READILY OPERABLE.

5
Warning Symbols
No user serviceable parts inside
Environmental considerations
Temperature Operating 5°C to 30°C
(41°F to 86°F)
Non-operating -20°C to 50°C
(-2°F to 122°F)
Max Gradient 15°C/Hour
(59°F/Hour)
Relative Humidity Operating 20% to 80%
Non-operating 5% to 90%
Max wet bulb 28°C non-condensing
(or 57°F non-condensing)
Altitude Operating 0 to 2,000m
.Non-operating 0 to 12,000m
Cooling
Care must be taken not to place any accessories that could
block the ventilation above or below the heat sinks at the
rear of the console.
All PSU's will operate over an ambient temperature range
of -10°C to +30°C (14°F to 86°F).
The console must not be powered up or operated with the
dust cover still in place.
Please refer to the manual before operating
Danger of electric shock
Disconnect from the MAINS before opening cover

6
Important Safety Instructions
READ THESE INSTRUCTIONS AND KEEP THEM HANDY
HEED ALL SAFETY WARNINGS
THE CONSOLE MUST BE EARTHED WHEN OPERATED
DO NOT USE NEAR WATER
CLEAN ONLY WITH A DRY CLOTH
DO NOT INSTALL NEAR HEAT SOURCES
DO NOT BLOCK VENTILATION OPENINGS
THE AMBIENT ROOM TEMPERATURE SHOULD BE NO
GREATER THAN 30°C / 86°F
PROTECT THE POWER CORDS
USE ONLY ACCESSORIES SPECIFIED BY THE
MANUFACTURER
UNPLUG WHEN UNUSED FOR LONG PERIODS OF TIME OR
DURING LIGHTNING STORMS
MODULES AND CARDS SHOULD NOT BE INSERTED OR
REMOVED WITH THE POWER ON
REFER ALL SERVICING TO QUALIFIED PERSONNEL ONLY
THE CONSOLE MUST ONLY BE MOVED BY AT LEAST TWO
PEOPLE
NO USER SERVICEABLE PARTS INSIDE

7
IMPORTANT POWER NOTICE
THE 8424 CONSOLE IS SUPPLIED WITH A 3-CORE AC POWER CABLE
APPLICABLE TO THE REGION IT IS TO BE OPERATED IN, AND MUST
BE CONNECTED TO A 3-PIN EARTHED SUPPLY.
IF A REPLACEMENT CABLE IS USED, THEN THE EARTH FROM THE
MAINS SOCKET OR TECHNICAL EARTH TO THE CONSOLE MUST BE
MAINTAINED.
IF ONLY A 2-PIN (NO EARTH) SUPPLY IS AVAILABLE, THEN THE
8424 CONSOLE MUST BE INSTALLED BY A QUALIFIED ELECTRICIAN
TO ENSURE THAT THE CONSOLE METALWORK IS PERMANENTLY
EARTHED.
THE CONSOLE SHOULD ONLY BE POWERED FROM A SINGLE-PHASE
SUPPLY WITH THE NEUTRAL CONDUCTOR AT EARTH POTENTIAL.
FAILURE TO FOLLOW THESE PROCEDURES AND RECOMMENDATIONS
COULD INVALIDATE THE MANUFACTURER'S WARRANTY

8
Table of Contents
Health & safety Notice..............................................................................................................2
Important safety instructions USA ..................................................................................3
Warning Symbols .......................................................................................................... 5
Environmental Considerations ...................................................................................... 5
Cooling..........................................................................................................................5
Important Safety Instructions UK ..................................................................................6
Important Power Notice................................................................................................ 7
Introduction .............................................................................................................................9
Console Overview ................................................................................................................... 10
Channel Strip Overview .......................................................................................................... 11
Master Section Overview........................................................................................................ 12
About This Manual.................................................................................................................. 13
Conventions Used ....................................................................................................... 13
Console surface Colour coding .................................................................................... 13
Power Procedure .................................................................................................................... 14
Safety notice ............................................................................................................... 14
Power Up Procedure................................................................................................... 14
Power Down Procedure .............................................................................................. 14
Quick Start .............................................................................................................................. 15
Cabling Requirements ................................................................................................. 15
Boot Mode.................................................................................................................. 15
Connecting the Console .............................................................................................. 15
Studio Setup............................................................................................................................ 16
Channel Strip........................................................................................................................... 17
Overview..................................................................................................................... 17
A/B Channel Input....................................................................................................... 17
Direct Pre .................................................................................................................... 17
Direct Output Signal Path............................................................................................ 17
Input Trim Encoder ..................................................................................................... 18
Global Input Trim Reset .............................................................................................. 18
Channel Meter ............................................................................................................ 18
Stereo Cue .................................................................................................................. 19
Aux sends 1-3.............................................................................................................. 20
Insert/Input C.............................................................................................................. 20
Pan.............................................................................................................................. 20
Group Pan ................................................................................................................... 20
Channel Routing.......................................................................................................... 21
Solo............................................................................................................................. 21
ISO .............................................................................................................................. 21
Cut .............................................................................................................................. 21
Channel Fader............................................................................................................. 21
Groups 1-4............................................................................................................................... 22
Overview..................................................................................................................... 22
Group EQ .................................................................................................................... 22
Pan.............................................................................................................................. 22
Group routing ............................................................................................................. 22
Group 1-4 Output Pre ................................................................................................. 22
Group Output Signal path ........................................................................................... 22
Solo............................................................................................................................. 23
ISO .............................................................................................................................. 23
Cut .............................................................................................................................. 23
Group fader................................................................................................................. 23
1073 Preamps ......................................................................................................................... 24
Overview..................................................................................................................... 24
Gain Control................................................................................................................ 24
Trim Control................................................................................................................ 24
Preamp Controls ......................................................................................................... 24
500 series Routing....................................................................................................... 24
Instrument DI Inputs............................................................................................................... 25
Overview..................................................................................................................... 25
Instrument DI Controls................................................................................................ 25
500 series Routing....................................................................................................... 25
500 Series Slots ....................................................................................................................... 26
Overview..................................................................................................................... 26
500 Series Routing ...................................................................................................... 26
Direct Input/Output .................................................................................................... 26
Reverb Returns ....................................................................................................................... 27
Overview..................................................................................................................... 27
Reverb Return Controls............................................................................................... 27
Reverb Return Routing................................................................................................ 27
Aux & Cue Masters ................................................................................................................. 28
Overview..................................................................................................................... 28
Global Aux Controls..................................................................................................... 28
AUX 2&3 as CUE mix 2................................................................................................. 28
Engineer Headphones............................................................................................................. 29
Overview..................................................................................................................... 29
EHP 1........................................................................................................................... 29
EHP 2........................................................................................................................... 29
EHP 2 Source Selection................................................................................................ 29
Talkback.................................................................................................................................. 30
Overview..................................................................................................................... 30
Talkback controls ........................................................................................................ 30
Talkback Trim Pots ...................................................................................................... 30
Cue Talkback .............................................................................................................. 30
Slate Talkback ............................................................................................................. 30
Return Talkback .......................................................................................................... 31
Talkback Footswitch.................................................................................................... 31
Solo Modes ............................................................................................................................. 32
SIP ...............................................................................................................................32
AFL ..............................................................................................................................32
PFL...............................................................................................................................32
Global Solo Controls.................................................................................................... 33
Master Controls ......................................................................................................................34
Overview..................................................................................................................... 34
Solo Safe......................................................................................................................34
Reset ...........................................................................................................................34
48 MIX.........................................................................................................................34
Aux On/Pre.................................................................................................................. 34
IPC MTR.......................................................................................................................34
A/B CH IP.....................................................................................................................34
Stereo Mix Processing............................................................................................................. 35
Overview..................................................................................................................... 35
EQ ...............................................................................................................................35
Stereo Width...............................................................................................................35
Stereo Mix Routing .................................................................................................................35
Overview..................................................................................................................... 35
Mix bus Inject L/R........................................................................................................ 35
500 1/2........................................................................................................................ 35
Cue Bus .......................................................................................................................35
INS IN ..........................................................................................................................35
PRE..............................................................................................................................36
Stereo Mix Output Signal Path ...................................................................................36
Master Fader...............................................................................................................36
Control Room Monitor............................................................................................................37
Overview..................................................................................................................... 37
Control Room Source ..................................................................................................37
Monitor Level Controls................................................................................................ 37
VU Meter.................................................................................................................................38
Overview..................................................................................................................... 38
Meter Select................................................................................................................38
Services ...................................................................................................................................39
Master Options ........................................................................................................... 39
Talkback options .........................................................................................................40
Oscillator Functions.....................................................................................................40
System.........................................................................................................................40
Recall Store System.................................................................................................................41
Overview..................................................................................................................... 41
Save............................................................................................................................. 41
Load ............................................................................................................................42
Auto Scan .................................................................................................................... 44
Manual Recall..............................................................................................................46
Return Talkback Options.........................................................................................................47
Overview..................................................................................................................... 47
Live room return Talkback ..........................................................................................47
Producers sofa mic......................................................................................................48
Additional Recording Input..........................................................................................48
Service outputs (DC Remotes) ................................................................................................ 49
2T VU MTR OSC TB..................................................................................................................49
Example Applications..............................................................................................................50
Mixing .........................................................................................................................50
Recording ....................................................................................................................51
Overdubbing ............................................................................................................... 52
48 Input Mix Mode .................................................................................................................53
IN-Line Mode (ILM) .................................................................................................................54
Parallel Processing ..................................................................................................................55
Audio Interface Setup .............................................................................................................56
Firmware update software .....................................................................................................57
Abbreviations and acronyms ..................................................................................................59
Dimensions & power requirements........................................................................................ 60
Console Physical/Technical Information...................................................................... 60
Fuse ratings.................................................................................................................60
Console Rear Connections ...................................................................................................... 61
Power Unit .................................................................................................................. 61
Channel inputs ............................................................................................................61
Master Inputs/outputs................................................................................................62
Monitor Connections .................................................................................................. 62
Console Connections Table .....................................................................................................63
Main............................................................................................................................63
Channel inputs A/DAW Returns ..................................................................................64
CH DAW RET I/P A 1-8 .........................................................................................64
CH DAW RET I/P A 9-16 .......................................................................................64
CH DAW RET I/P A 17-24 .....................................................................................64
Channel inputs C/DAW Returns...................................................................................65
Input C 24-32 ......................................................................................................65
Input C 33-40 ...................................................................................................... 65
Input C 41-48 ......................................................................................................65
Channel Direct Outputs...............................................................................................66
Direct outs 1-8 .................................................................................................... 66
Direct outs 9-16................................................................................................... 66
Direct outs 17-24 .................................................................................................66
Line inputs and Outputs ..............................................................................................67
XLR inputs and Outputs...............................................................................................67
DC Remote Pin out Functions......................................................................................67
2T VU MTR Pin out Functions...................................................................................... 67
8424 Audio Specification ........................................................................................................68
General Specification ..............................................................................................................69

9
Introduction 1
For almost 60 years, the designers and engineers at Neve have worked uncompromisingly to produce the world's
premier audio recording and mixing equipment. As a result, our products have long exceeded the most stringent
requirements for sound quality and musicality –from countless classic albums to the vast majority of each year's
blockbuster films. This technical expertise and industry-led design is taken forward into every new Neve console,
combining with modern enhancements to meet the needs of todays studios. Introducing the 8424…..
Legendary 80-series Neve sound, 4groups, 24 channel faders
The 8424 console is designed to fit the needs of the modern hybrid studio where the speed of in-the-box workflow
is enhanced with the ultimate sound quality of analogue outboard gear. The 8424 provides a centralised platform
with unparalleled connectivity, facilitating an ergonomic link between the linear analogue processing world of
outboard gear, analogue synths, and instruments, to the digital world of DAW workflow, software plugins
and session recall.
The 8424’s Marinair® transformer-coupled Stereo Mix bus delivers legendary Neve® sound, derived from the iconic
80-series consoles. 24 channels, 4 groups and 48-mix capability give this small footprint console huge routing and
summing potential. Dual on board 1073® preamps, Instrument DI’s and headphone amplifiers provide a
comprehensive recording platform, with a fast, efficient workflow that keeps the creativity flowing in the studio.
The 8424 has an on-board Recall system which further integrates the console into the modern hybrid studio
workflow. This unique feature enables this pure analogue console to save, load, and recall all settings, faders and
pot positions for on a session by session basis. With this unrestricted workflow, engineers can take advantage of
all analogue features without the added worry of losing console settings and wasting valuable studio time.
As with all Neve products, the 8424 offers sound and build quality beyond reproach. All the audio connections
on the 8424 are balanced and +4dBu with the exception of the iMon input and engineers’ headphones.
The 8424 is designed to be straightforward and accessible to all. this versatile and powerful desk provides a central,
creative hub where analogue outboard gear, synthesisers and a host of instruments combine with the digital world
of DAW workflow, software plugins, and session recall. Every piece of studio magic can now be connected through
the ultimate creative platform –The 8424 console.
AMS Neve Ltd
AMS Technology Park
Billington Road
Burnley
Lancashire
England
BB11 5UB
Phone: [phone]
Fax: [phone]
Email: [e-mail]
Web: www.ams-neve.com
© ® 2005 - 2020 AMS Neve Ltd own the copyright of all information and figures contained in this manual which are not to be copied or reproduced by any
means or disclosed in part or whole to any third party without written permission. As part of our policy of continual product improvement, we reserve the right
to alter specifications without notice but with due regard to all current legislation.
Disclaimer: The information in this manual has been carefully checked and is believed to be accurate at the time of publication. However, no responsibility is
taken by AMS Neve Ltd for inaccuracies, errors or omissions nor any liability assumed for any loss or damage resulting either directly or indirectly from use of the
information contained within.
Trademarks: Neve®, 1073® and Marinair® are registered trademarks. AMS Neve Limited pursues a policy of continual improvement therefore all specifications
are subject to change without notice. All trademarks are property of their respective owners E & O E ©2020 AMS Neve Ltd.

10
Console Overview 9
8424 Console Features
•24 Mono channels with source selections and 100mm faders
•24 Channel Direct Outputs
•4 Groups with 100mm faders
•3 Mono Auxiliary sends
•1 Stereo Cue send
•2 Stereo Reverb Returns
•Marinair® Transformer coupled Stereo Mix bus
•2 1073® Microphone Pre-amplifiers
•2 Hi-z DI inputs
•2 500 Series Slots
•4 Mono, 1 Stereo 2-band shelving EQ
•1 Stereo Width control
•2 stereo External inputs
•3 Loudspeaker Outputs
•2 engineers headphone outputs
•30 Balanced Inserts on Channels, Groups & Stereo mix
•48 Input Capability
•8 Stage LED Channel Input Meters
•Assignable Backlit VU meters
•Global channel A/B input switch
•Oscillator
•Smart routing
•Comprehensive connectivity on console rear
•Internal Power Supply
Channels 1 –16
Master Section
Channels 17-24

11
Channel Strip Overview 9
A/B Input select
Input Trim
Channel Meter
Stereo Cue Send
Aux Sends 1-3
Channel Insert
Channel Pan
Channel Routing
Channel solo/cut
Channel Fader
Stereo Cue Pan
GRP Pan
Insert to Input C
Direct Out Pre

12
Stereo VU Meters
Aux/Cue masters
Group/Stereo
Mix Routing
Routing
Group Faders
Mix Fader
Group Pan
Master Section Overview 1
1073 Preamps
Services Screen
Headphone 2
Group/Mix EQ
Control Room
Monitor Section
Talkback
Controls
Stereo Width
Instrument DI’s
500 Series Slots
Reverb Returns
Global Controls
Group Solo/Cut
Stereo Mix Cut

13
About this manual 1
This manual consists of:
•A section-by-section operational overview of all parts of the console surface
•Technical & physical specifications including power consumption,
dimensions, weight and other relevant information
•Schematics and reference drawings of D-Type pin-outs
There is a Heading Index at the start.
There is also a table explaining the Acronyms and Abbreviations of the most
commonly used buttons and functions on page 58 of this document.
Many rotary controls on the 8424 have a push-activation ON/OFF function.
Simply push the pot to switch the control ON or OFF.
Where relevant, the ON/OFF state of the control is displayed by an adjacent LED.
Conventions used 1
All button names / rotary controls are shown in BOLD CAPITALS.
Additional Global controls and notes for set parameters are shown
in bold grey italics.
An arrow-shaped bullet-point indicates you should do this action.
Console surface colour coding 1
The knobs and buttons on the Channel Strip and master sections of the
console are colour-coded for ease of operation.
Type
Control
Colour
Rotary
Level Control
Dark Grey
Pan
Dark Blue
Gain/Trim
Dark Red
High Shelf EQ
Light Blue
Low Shelf EQ
Black
Monitor level
Bright Red

14
Power Procedure 1
Safety Notice
Before plugging the 8424 into the mains supply, please make sure of the following safety precautions:
The amplifier connected to the speakers is turned off and the volume controls are turned fully down (or if
using active speakers, ensure they are turned down and turned off).
Ensure the 8424 Control Room Monitor level is fully turned down.
All faders (including the Main Output faders) are at the bottom of their run at the CUT (∞) position.
Power-up procedure
Turn on the power to 8424 using the power switch on the rear of the console.
Switch the amplifier on (or the speakers if you are using active speakers).
Turn the amp (or speakers) to the desired level.
On the 8424, ensure that the Control Room level is turned down and un-cut the monitoring (as a safety feature,
the monitoring system will always be CUT when first switching the system on).
Move the Channel faders to the desired levels and put the Main mix fader up to 0dB.
Turn the Control Room Monitoring level up.
In this state, the console is ready to start recording from the A or B inputs with the Direct Outputs feeding the DAW
(or tape machine)
Power Down Procedure 1
Ensure your work is saved to the relevant medium.
Turn the Control Room Monitoring down as far as it will go and press the master CUT button for the speakers.
Turn the output level on the speaker's amplifier down to CUT, then turn the power off (if using active speakers,
turn each speaker down before removing the power).
Safely remove the power to 8424.
Failure to follow this procedure correctly could
invalidate the manufacturer warranty

15
Quick Start 1
Cabling Requirements 1
•DAW Interface Outputs (Input A) - 25-Pin D-Sub > D-Sub loom x3
•Line Inputs (Input B) - ¼’’ TRS Jack 1-24
•Direct outputs - 25-Pin D-Sub > D-Sub Loom x 3
•Insert send/Return - ¼’’ TRS Jack 1-24
•Group insert Send/Return –¼’’ TRS Jack 1-4
•Mix/Aux/Cue/Group output –XLR x9
•loudspeaker Outputs –XLR x6
•Reverb returns/EXT/500 series/1073 inputs –XLR x10
Boot Mode 1
Upon start-up, the 8424 is configured with all channel inputs on Input B.
This can be changed by switching the inputs individually on each channel, or
by pressing the global A/B CH IP switch in the master select section of the
console. Green LED’s indicate Input A state, Yellow indicate Input B.
To protect the system from feedback, the direct outputs from the channels
are fed from Input B by default. This can be changed in the services screen
by selecting MAST> IPA DIR [Y].
The console will always boot up in safe mode. This state ensures that no
damage incurs to loudspeakers or additional studio equipment on start-up.
In safe mode all feeds to speakers will be CUT (speaker outs will illuminate
RED to indicate CUT state). The control room monitor level should also be
turned fully down automatically to further protect studio equipment.
Connecting the console 1
Connect DAW interface outputs into the 8424 channel Inputs A via
the three D-sub connectors 1>8 9>16 17>24.
Connect line level instruments or external preamps into the 8424
channel inputs B where required. 1>24 ¼’’ Jack.
Connect channel Direct Outputs 1-24 to DAW interface inputs via
the D-sub connector 1>8 9>16 17>24.
Connect MIX O/P L and MIX O/P R into your DAW interface to
record your Stereo Mix back into the DAW.
Connect group 1-4 outputs GRP1 OUTPUT 1-4 into your DAW
interface if required.
Connect Aux outputs AUX O/P 1-3 to external FX units.
Connect external FX returns to Reverb Returns REV1 and REV2 L+R.
Connect Headphones to EHP1 and EHP2
Connect headphone amplifiers to CUE O/P L+R if required.
Connect studio speakers to A LS O/P Left and Right XLR.
Connect additional studio Speakers to M1 LS O/P Left and Right XLR.
Connect any analogue hardware inserts to each channel or group
using the ¼’’ jack connectors at the rear of the console.
Connect analogue hardware inserts to the master channels using
the XLR connectors at the rear of the console MIX INS SEND and
MIX INS RETURN.

16
Audio Interface
Studio Setup 1
Line Input B
1-16
1073 & DI
inputs
Line Input B
17-24
Insert
Sends
Aux
Sends
Reverb
Returns
EHP 2
DAW Returns
Input A
1-24
Monitor
Outputs
Line Level
Instruments
Loudspeakers
A, M1, M2
Microphones
DI Instruments
Artist
Headphones
External Preamps
Outboard Rack Gear
External FX Units
Engineer
Headphones
DAW
Computer
EHP 1
Insert
Returns

17
Channel Strip 1
Overview 1
One of the core design concepts of the 8424 is that each channel can select
its input from two alternative line input sources. This enables the 8424 to be
used for Mixing, Recording and Overdubbing. The A/B CH IP switch on every
channel will select either channel Input A(DAW Interface Outputs) or
channel Input Bfor line level instruments or external preamps. Each channel
trim pot will function independently for both Input A and Input B. The Input
trim LEDs will indicate the trim level for each input Aor B. When Switching
between inputs, the TRIM level will swap between Input A and Input B
levels. The I/P LED will indicate the current selected input - Green for Input
A trim or for Input B trim. Each trim level is separate, this allows for
precise and independent trim control of both channel input levels.
A/B Channel Input 1
This function selects the input source for each channel and will light
for Input A or for Input B.
Input A is fed by a 25-way D-Type connector on the rear of each fader bank
in sets of 8.
Input A should be used to connect your DAW interface outputs to the
console.
To protect the system from feedback, the direct outputs from the channels
are fed from Input B by default. This can be changed in the services screen
by selecting MAST> IPA DIR [Y].
Input B is fed by ¼’’ TRS connectors to the rear of each individual channel.
Input B can be used for any line level input such as external pre-amp
outputs or line level instruments to be directly tracked through the console.
The Global A/B CH I/P switch can be found in the centre of the console.
Direct Pre 1
The DIR PRE button will route the channel direct output pre-fader. This can
be used to create DAW stem tracks un-affected by the current control room
fader levels. When DIR PRE is inactive, the direct outputs are post-fader, any
channel fader motions will affect the direct out signal. This can be used to
record audio adjustments directly onto the DAW stem tracks, creating
manual level changes on certain mix elements. Pre or Post fader Direct Outs
are sent post-channel insert, allowing for outboard hardware processing to
be added into the signal chain and recorded into the DAW.
The Global DIR PRE switch is activated from the services screen in
MAST>DIR PRE
Direct Output Signal Path 1
Direct outputs are post fader in their default state.
DIR PRE selected
DIR PRE not selected
Channel Input A/B
Channel Input A/B
Input Trim
Input Trim
Insert
Insert
Direct Output Trim
CUT
Direct output D-Sub
Fader
CUT
Direct Output Trim
Fader
Direct Output D-Sub

18
Input Trim Encoder 1
Each channel features a stepped +/-20dB trim pot. This is controlled by the
rotary encoder at the top of each channel (when in I/P mode).
The gain increments are-
+/- 1dB, 2dB, 3.5dB, 5dB, 6.5dB, 8dB, 9.5dB, 11dB, 12.5dB, 14dB. 15.5dB,
17dB, 18.5dB, 2 0dB.
The encoder LED will indicate the gain level for the selected Aor B channel
input. When switching between A/B CH IP the LED will change to indicate
I/P A or I/P B trim gain. Following shutdown and restart of the console all
channel trim settings are reset to the default setting of 0dB. To save and
load the trim settings for your session, use the services screen in the centre
of the console and choose the SYSTEM SAVE or LOAD.
More information on SAVE/LOAD can be found on page 41.
Note: Loading a saved state will overwrite all Trim A/B/Direct out levels.
The input trim encoder is dual function and can be pressed to toggle
between three states of action-
•I/P sets the encoder to act as a +/- 20dB trim pot for all incoming
line levels. This functions for both Input A and Input B
independently and will toggle between both inputs displaying
for Input A and for Input B.
The Global A/B CH I/P switch can be found in the centre of the console.
•DIR sets the level of the direct output pre/post fade/cut for the
selected channel; the channel direct out has +10dB gain in hand
which can help to boost the input level of any low gain signals into
your DAW interface. By default, direct outputs are set to channel
Input B. Input A can be sent to the Direct Output, via the services
screen in the centre of the console by selecting
MASTER>IPA>DIR:[Y]
•FNC is reserved for future console Firmware upgrades.
Direct out level will always be retained regardless of channel input
selection A or B.
Global Input Trim Reset 1
Channel Input A and B Trim levels can both be globally reset to zero from
the console services screen. To globally reset Input B trim levels from the
services screen, select MAST>ZERO IP B. To globally reset DAW returns
Input A select MAST>ZERO IP A.
Channel Meter 1
Each Channel on the 8424 has its own 8 stage PPM input level meter which
displays input signal levels from -30dB through to +24dB. Levels below 0dB
illuminate green and levels above 0dB will illuminate .The Red LED
will indicate clipping at +24dB.

19
Stereo Cue 1
Each Channel on the 8424 has a stereo cue send which can send audio from
channel input Aor B(depending which input is selected on the top of the
channel strip) to performers in the live/control room. The CUE send can also
be used as a stereo FX send. The ST CUE also has a third input option - Input
C. This input allows for an additional 24 inputs into the 8424 from the DAW.
More information on Input C uses can be found on page 53.
The CUE rotary send runs from -inf to 0dB and has push activation. Pressing
the Rotary level control will activate the cue send. The ON light will
illuminate green to indicate that the CUE is active. Each cue has its own L/R
Pan control which can be activated by pressing the ST CUE PAN control.
The CUE can be set Pre or Post fader via simple button combinations listed
below. By default, the CUE sends signal from the channels selected input A
or B but can also be fed from Input A independent of channel input
selection or an additional Input C. (see page 53/54 for more information)
To toggle between PRE/POST fader-
Press and hold the CUE PAN and then press the CUE level controller.
The PRE LED will indicate the sends pre-fader state.
To select Input C as the Stereo cue source-
Press and hold the CUE PAN and then press the CUE controller
twice. I/P C I/P A LED will illuminate to indicate that Input C
is the CUE source.
To toggle between I/P C or I/P A Cue send source-
When the I/P C, I/P A LED is illuminated, press and hold A/B CH IP at
the top of the channel strip then press the CUE level control, The I/P
A I/P C LED will illuminate to show that Input A is the signal
stereo cue source or will illuminate to indicate that Input C is
the signal source for the stereo cue send.
To Globally select Input C for all CUE inputs-
Press 48 MIX in the Master section of the console.
48 mix is explained in greater detail on page 53
To Globally select Input A for all CUE inputs-
Press 48 MIX in the Master section of the console
From the services screen press MASTER then select ILM [Y]
ILM is explained in greater detail on page 54
The CUE send pre-fade option will function differently depending on which
channel input A/B is selected. This is to ensure that when recording or
overdubbing, the channel cut does not cut the cue send. Similarly, when
recording/mixing, the channel cut will cut the cue send.
If channel Input Bis selected –cue sends are pre-fade pre-cut
If channel Input A or Cis selected –cue sends are pre-fade post-cut
Global Stereo cue sends pre/post state can controlled by interlocking the
Aux On/Pre button and ST CUE master knob in the centre of the console.
More information on page 28.

20
AUX Sends 1-3 1
There are three mono aux sends per channel. Each rotary control sends level
from -inf to 0dB and has push activation. The ON light will illuminate
once the send is active. Each Aux send 1-3 is set to Post-Fade by default.
To switch to PRE-Fade-
Press and hold the CUE PAN controller, then press the AUX
controller.
The PRE light will illuminate to indicate pre-fader state.
AUX 2 and AUX 3 can also be used as a second stereo cue. AUX 2 becomes
the right signal and AUX 3 becomes the left signal of the second stereo cue
mix.
Further information on additional stereo cue mixes can be found on page
28.
The aux send pre-fade option will function differently depending on which
channel input A/B is selected. This is to ensure that when recording or
overdubbing, the channel cut does not affect the aux send and when mixing,
the channel cut will also cut the aux send appropriately.
If channel Input Bis selected –AUX sends are pre-fade pre-cut.
If channel Input Aor Cis selected –AUX sends are pre-fade post-cut.
Global Aux On/Pre fade state can be set by interlocking the Aux On/Pre
button and Aux master knobs in the centre of the console. More
information on page 28.
Insert/Input C 1
Just below the aux sends on the channel are the Insert IN and Insert to
Input (I/P C) switches. When illuminated, the insert IN switch will activate
the channels insert signal path from the Insert send and Insert return ¼’’ TRS
connector at the rear of the console. When I/P C is selected and illuminated,
the channel insert will be assigned to the signal path for the third channel
input (Input C) DAW interface outputs 24-48 and fed to the ST CUE input.
Further information about inputs 25-48 can be found on Page 52
Global INSERT IN and INSERT I/P C can be activated from the services
screen in MAST>INS IN and MAST>INS IP C
Note: Channel insert sends are always active. This allows a second pre-fade
direct out from each channel.
Pan 1
The 8424 pan-pot runs from 0dBu hard left, - 4.5dBu centre to 0dBu hard
right positions. The channel Pan-Pot functions for both Input A or Input B
depending on the selected channel input.
The Pan-Pot has push-activation and is switched on when the IN light is
illuminated.
All channel pans can be activated globally from the services screen in
MAST>MIX PAN.
GRP PAN 1
GRP Pan or ‘channel pan to group’assigns the channel pan position to the
group routing. When selected, the position of the Pan control is reflected in
the channels group assignments. I.E when the channel is routed to groups 1
and 2, panning hard left will send the channel signal to group 1 only,
panning hard right will send the signal to group 2 only and centre panning
will send the signal in equal amounts to both groups 1 & 2.
Global GRP PAN can be activated from the services screen in MAST>GRP
PAN.