Focusrite Red 4Pre User manual

User Guide
58 in /64 out Thunderbolt™ 2 audio interface – with Pro Tools | HD
and Dante™ network audio connectivity
Red 4Pre
www.focusrite.com
FFFFFA001418-01

2
CONTENTS
About this User Guide .......................................................4
Box Contents...............................................................4
Introduction..................................................................5
Key Features...................................................................5
System Block Diagram ..........................................................6
Red 4Pre Controls and Connections ...........................................7
Front Panel ....................................................................7
Rear Panel ....................................................................8
Physical Characteristics .....................................................9
Power Requirements ........................................................9
Operation...................................................................10
INPUTS .................................................................. 10
Analogue Inputs ...........................................................10
Input Controls .............................................................10
Preamp Overview Screen .......................................................10
Preamp Focus Screen ..........................................................10
Input Configuration.........................................................11
Input Functions................................................................11
Encoder Toggle Function ........................................................12
Line Inputs 5 – 8 ...........................................................12
DIGITAL INPUTS ........................................................... 13
ADAT ....................................................................13
S/PDIF ...................................................................13
Loopback Input ............................................................13
DANTE CONNECTION....................................................... 13
MONITORING ............................................................. 14
Monitors .................................................................14
Monitor Display ...............................................................14
Mute and Dim .................................................................14
Headphones ..............................................................14
METER DISPLAY........................................................... 15
Meter Source Selection .........................................................15
ANALOGUE OUTPUTS ...................................................... 15
THUNDERBOLT CONNECTION ............................................... 16
Logic Pro X Setup ..........................................................16

3
PRO TOOLS CONNECTION................................................... 17
Using Red 4Pre with other Pro Tools | HD interfaces .............................17
Loop Sync ....................................................................17
Pro Tools Setup............................................................18
Global Settings ..............................................................19
Host .....................................................................19
Sync .....................................................................19
Retain....................................................................19
Routing ..................................................................19
Focusrite Control ...........................................................20
System Requirements ......................................................20
Software Installation .......................................................20
Operation.................................................................20
Device Settings................................................................20
Mixing & Routing ..............................................................20
Device Settings GUI ........................................................21
Monitor Controls ..............................................................21
Appendices..................................................................22
Appendix 1 – Connector Pinouts ..............................................22
XLR Connectors ...............................................................22
DB25 (AES59) Connector ........................................................22
1/4” Jack Connectors...........................................................23
Pro Tools Interface ............................................................23
BNC Connectors...............................................................23
Ethernet Connector ............................................................23
Appendix 2 – Channel Allocation..............................................24
Sample Rate: 44.1 / 48 kHz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
Sample Rate: 88.2 / 96 kHz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
Sample Rate: 176.4 / 192 kHz ....................................................26
Appendix 3 – AIR information ................................................27
Performance and specications ..............................................28
Focusrite Red 4Pre Warranty and Service ......................................30
Registering Your Product ....................................................30
Customer Support and Unit Servicing .........................................30
Troubleshooting ...........................................................30

4
About this User Guide
This user guide applies to the Red 4Pre Thunderbolt Interface. It provides information about installing
and operating the unit and how it can be connected into your home or studio system.
Box Contents
• Red 4Pre unit
• IEC AC mains cable
• Product registration card – which provides the following important information:
Unit serial number
Bundle code (for registering your product and for accessing your free software)
Thunderbolt™ and the Thunderbolt logo are trademarks of Intel Corporation in the U.S. and/or other countries.
Dante™ and Audinate™ are registered trademarks of Audinate Pty Ltd.

5
INTRODUCTION
Thank you for purchasing the Focusrite Red 4Pre.
Red 4Pre is a dual Thunderbolt™ & Pro Tools | HD audio interface and preamplifier, suitable for a
wide range of audio integration applications.
Featuring Mic, Line and Instrument analogue inputs and fourteen analogue outputs – including
independent loudspeaker and headphone monitoring and LCD meter display. Red 4Pre provides an
interface for Pro Tools | HD equipped workstations and, with its built-in Dante™ card, is ready for
networked audio expansion via the dual Ethernet ports.
Key Features
• Two Thunderbolt 2 Interface ports for direct or chained connection.
• 8 line-level input and output signals via DB25 connectors on the rear panel.
• Four remote controlled microphone preamps providing up to 63dB of gain, each with phantom
power, high-pass filter, phase-reverse and ‘AIR’ mode. See Appendix3, page 27 for further information.
• Two instrument inputs accessed via front-mounted 1/4” jacks.
• Analogue monitoring via dedicated balanced 1/4” jack outputs on the rear panel, plus two
independent headphone outputs on the front panel.
• Digital devices can be accommodated via the dual ADAT I/O and S/PDIF connections.
• Two Primary Mini DigiLink connectors provide up to 60 input and 64 output channels of I/O to Pro
Tools | HD.
• Dual Ethernet ports provide up to 32 x 32 channels of networked audio expansion over Dante.
• BNC connectors allow the Red 4Pre to sync or slave to external devices via Word Clock.
• Permanent 8-channel LCD meter display – selectable to show all input types.
• Simple host and sync selection setup.
• Focusrite Control application allows full remote hardware operation, plus mixing and routing
control when in Thunderbolt host mode.

6
System Block Diagram
Mic
1-4
Analogue
Inputs
Pro Tools
Instrument
1-2
Line
1-8
16
2
Line
3-10
Monitor
1-2
Headphones
1-2
ADAT 1
1-8
S/PDIF In
Thunderbolt
Dante
Network
ADAT 2
9-16
S/PDIF Out
DAW
Digital
I/O
2
Analogue
Outputs
16
2
8
2
8
Word Clock
Loop Sync Sync
Network
Loopback In 2
ch1-4
ch1-2
ch1-8
A-D
2
64
60
32
32
Input Function
& Gain Input Select Output ControlMeters
Pre
SELECT
I
3
2
4
I
2
INST GLOBAL
MONITOR
METER
I
2
Focusrite
ROUTER
D-A
Host
Select
Numbers indicating channel capacities relate to a 44.1/48 kHz sample rate. Refer to the Channel I/O tables
on pages 24–26 for the channel counts at higher sample rates.

7
Red 4Pre Controls and Connections
Front Panel
• Instrument Inputs. Two high-impedance inputs on 1/4” jack sockets.
• Input Select buttons provide direct access to the menu settings for analogue input channels 1–4.
• The Input Encoder and its associated Display is used to select and adjust the configuration
menu settings for the input channels; it also functions as the input gain control.
• The Level Meter is an eight channel, switchable LCD meter which is able to display groups of
input signals.
• The Output Encoder functions as the volume control for the monitor and headphone outputs.
It is used to configure the global system settings, control the meter selection and select the
monitor dim and mute features. Its function is determined by the adjacent Monitor, Meter and
Headphone Select buttons.
• The Meter button calls up the selection menu for the level meters onto the Output Encoder
display.
• The Monitor button assigns the output Encoder to the monitor loudspeaker functions.
Pressing the Meter and Monitor buttons simultaneously enters Red 4Pre’s Global conguration menu, where
host, sync, power-up and network settings are assigned.
• The Headphone 1 and 2 buttons assign the Output Encoder to the selected headphone control
functions.
• Headphone Outputs are standard 1/4” stereo jacks.
SELECT
I
3
2
4
I
2
INST GLOBAL
MONITOR
METER
I
2
Focusrite
Pre
Level Meter
Display
Meter & Monitor
Buttons
Instrument
Inputs
Input Select
Buttons
Input
Encoder
Input
Display
Output
Display
Output
Encoder
H/phone
Select
H/phone
Outputs
Power Switch

8
Rear Panel
• AC Mains Inlet. Standard IEC receptacle for connection of AC mains. Red 4Pre features a
‘Universal’ PSU, enabling it to operate on any supply voltage between 100 V and 240 V AC.
• Word Clock – Input allows synchronisation to word clock.
• Word Clock – Output provides an output of the chosen system clock reference.
• Loop Sync I/O sockets allow Red 4Pre to integrate with a standard Pro Tools system I/O chain.
• Dual Thunderbolt 2 Connection. Two ports allow either direct or chained connection to your
workstation.
• Pro Tools Interface. Two Mini DigiLink Primary connectors; use Mini DigiLink cables to connect
to the Pro Tools | HD and HDX PCIe card.
• Line Inputs on 25-way D-Sub female connector. The line inputs are wired according to the AES59
Standard (also known as the TASCAM Analogue standard).
Note that Line input circuits 1 – 4 can be re-assigned to the Microphone and/or Instrument connectors so may not
always be available in the D-sub. See page 11 for further information.
• Line Outputs on 25-way D-Sub female connector.
• Microphone Inputs on latching XLR3-F connectors.
• Network. Two RJ45 Ethernet connectors for the Dante network. The connectors form an integral
2-port switch, allowing either to be used on the network
• ADAT I/O 1 and 2. Two independent 8-channel ADAT optical inputs and outputs using standard
TOSLINK connectors.
• S/PDIF I/O. 2-channel digital interface on RCA (phono) connectors.
• Monitor Outputs. Balanced 1/4” TRS jacks for connection of Left and Right monitor loudspeakers.
Outputs are at line level so unpowered speakers will require external amplification.
See Appendix 1, page 22 for the connector pinouts.
THIS EQUIPMENT MUST BE
EARTHED BY THE POWER CORD
WARNING
Focusrite
WORD
CLOCK
LOOP
SYNC OPTICAL 9-16 OPTICAL 1-8
IN OUT IN OUT
IN OUT
SPDIF MONITOR OUTPUTS
PRIMARY PORT
LINE INPUTS 1-8
LINE OUTPUTS 3-10 MIC INPUTS
1234
12
R L
1 2
IN
OUT
Thunderbolt 2
Interface
Pro Tools
Interface Line Inputs
Loop
Sync
Word
Clock
AC Inlet
ADAT
I/O x2
Dante
Network
S/PDIF
I/O
L/R Monitor
Outputs Line Outputs Microphone Inputs

9
Red 4Pre dimensions are illustrated in the diagram above.
Red 4Pre requires 1U of vertical rack space and at least 360 mm of rack depth, to allow for cables.
Red 4Pre weighs 4.97 kg and for installations in a fixed environment (eg., a studio), the front-panel
rack mountings will provide adequate support. However, if the units are to be used in a mobile
situation (eg., flight-cased for touring, etc.), it is recommended that side support rails or shelves are
used within the rack.
Cooling is by fan assistance from side to side; the fan used is low-speed and low-noise. Do not mount
the unit immediately above any other equipment which generates significant heat, for example, a
power amplifier. Also, ensure that when mounted in a rack, the side vents are not obstructed.
Note.The maximum operating environmental temperature is 40°C / 104°F.
Power Requirements
Red 4Pre is mains-powered. It incorporates a ‘Universal’ power supply which can operate on any AC
mains voltage from 100 V to 240 V. The AC connection is via a standard 3-pin IEC connector on the
rear panel.
A mating IEC cable is supplied with the unit – this should be terminated with a mains plug of the
correct type for your country.
The AC power consumption of the Red 4Pre is 35W.
Please note that there are no fuses in Red 4Pre, or other user-replaceable components of any type.
Please refer all servicing issues to the Customer Support Team (see “Customer Support and Unit
Servicing” on page 30).
Physical Characteristics
465.0mm / 18.3”
31.8mm / 1.25”
300mm / 11.8”

10
OPERATION
Inputs
Red 4Pre has the capacity to accommodate eight analogue inputs, two independent 8-channel ADAT
inputs, a 2-channel S/PDIF input plus 32 Dante input channels. (Additionally, when in Thunderbolt host
mode, an internal 2-channel loopback signal can be added as an extra stereo input – see page 13 for details)
Analogue Inputs
The 8 analogue inputs can be assigned to the Instrument, Microphone or Line input connectors as
follows: Input channels 1 and 2 are selectable as instrument, microphone or line level; Inputs 3 and
4 are mic or line selectable; Inputs 5 – 8 are line level only.
Input Controls
Input selection and configuration for channels 1 to 4 is carried out
using the Preamp Select buttons and the Input Encoder.
The illuminated Select button identifies the channel being controlled.
• Pressing a Select button makes that channel the active channel
Power-up always selects channel 1
• The Input Encoder acts as the gain control for the active channel
• Pushing (’clicking’) the Input Encoder selects menu options or
operates the Toggle function (see page 12)
Preamp Overview Screen
This is the default display for input channels 1 to 4. It shows at-
a-glance the current input type, gain setting and phantom power
status of the four inputs.
The highlighted number indicates the active channel (as shown for
channel 1).
Note: a clipping channel will be indicated by its gain level bar changing to red (as
shown for channel 3) – reset by pressing the channel’s Select button.
Preamp Focus Screen
Pressing an input Select button brings up the Focus screen which
displays additional detail about that channel’s current settings.
If no changes are made within approximately 3 seconds, the display
will revert to the Overview screen.
In the example shown, channel 1 has the phase and HPF functions enabled.
Line
+48V
I2 Phase
HPF
Air
I
Preamp Focus Screen
Line 48
12
Line 48
2
31
Mic 48
3
50
Mic
4
12
I
48
Preamp Overview Screen
Select Buttons / Input Encoder

11
Input Configuration
The settings for an input channel – its input type and function options
– are selected via the Config Menu.
• To enter the Config Menu, press-and-hold a channel’s Select
button
To exit this screen, press any of the channel Select buttons (or, rotate
the Input Encoder to the ‘Back’ option and then click).
Input Functions
The following channel functions can be set, or toggled On/Off, from the Config Menu screen:
• Type selects the signal input type to be used for the channel:
For channels 1 & 2: Instrument › Mic › Line
For channels 3 & 4: Mic › Line
• +48V enables phantom power for the selected microphone input
• Phase applies phase inversion to the selected channel
• HPF switches in the 80Hz high-pass filter
• AIR changes the microphone, line and instrument input characteristics to AIR mode. (See Appendix
3, page 27 for further information)
• Link combines channels 1 & 2 [and/or 3 & 4] so they operate as a stereo pair. When linked, Gain
and Input Type changes to either of the paired channels will be applied to both
When linking channels, the existing gain and input type settings for channel 1 [or 3] will be applied to channel
2 [or 4]
• Back exits the Config Menu screen and returns to the Overview display
Pressing any of the channel Select buttons will also exit the Cong menu screen)
To change an input function:
1 Rotate the Input Encoder until the required function is
highlighted
2 Push the Input Encoder to step through the input types or to
toggle On/Off
+48V
Phase
HPF
Air
Link
Back
Line
On Off
Type
OffOn
On
On
Off
Off
On Off
Channel Config Menu Screen
+48V
Phase
HPF
Air
Link
Back
Line
Type
OffOn
On Off
On Off
On
On
Off
Off
Channel Function Selection

12
Encoder Toggle Function
The Input Encoder can be programmed to toggle any one of the input
functions with a single push (ie., without having to enter the Config
Menu screen). This can be very useful when, for example, experimenting with
microphone phasing.
To select a function for the Input Encoder toggle feature:
1 Enter the Config Menu screen
2 Scroll to the function required for the toggle feature
3 Press-and-hold the Input Encoder until the confirmation
message appears in the input display
The selected function will now toggle on/off* each time the Input
Encoder is clicked.
*If ‘Type’ was selected, clicking the Input Encoder will step through the available
inputs.
Line Inputs 5 – 8
Line input channels 5 to 8 are always available on the input DB25 connector.
The gain of these channels is not variable.
An input signal level of +18 dBu corresponds to 0 dBFS.
+48V
Phase
HPF
Air
Link
Back
Line
On Off
Type
OffOn
On
On
Off
Off
On Off
Stored
Press Function
Phase
Input Encoder Toggle Confirmation
THIS EQUIPMENT MUST BE
EARTHED BY THE POWER CORD
WARNING
Focusrite
WORD
CLOCK
LOOP
SYNC OPTICAL 9-16 OPTICAL 1-8
IN OUT IN OUT
IN OUT
SPDIF MONITOR OUTPUTS
PRIMARY PORT
LINE INPUTS 1-8
LINE OUTPUTS 3-10 MIC INPUTS
1234
12
R L
1 2
IN
OUT

13
Digital Inputs
ADAT
ADAT inputs 1 and 2 are accessed via the rear panel connectors. Signals
will be available if the source is connected and locked.
Each In/Out connection provides:
• 8ch at 44.1 / 48 kHz
• 4ch at 88.2 / 96 kHz (SMUX)
• 2ch at 176.4 / 192 kHz (SMUXII)
S/PDIF
A two-channel S/PDIF I/O connection is accessed via the RCA/Phono connectors
on the rear panel.
Loopback Input
The Red 4Pre’s virtual loopback inputs allow you to record any mix within
Focusrite Control back into your DAW. This could be the audio output of
another software application, or an entire monitor mix within Focusrite
Control including analogue or digital inputs mixed with any playback
signals you wish to capture in your DAW.
Loopback uses the Red 4Pre’s virtual inputs, which have no physical
connectors on the hardware interface itself, but may be selected in the
DAW as signal sources for recording in the same way as any other.
For Focusrite Control information, see page 20.
Dante Connection
Two switched RJ45 connectors for the Dante network are located on the rear
panel. Use a standard Cat 5e or Cat 6 network cable to connect to the Dante
audio network.
Incorporated into each socket are LEDs which illuminate to indicate a valid
network connection and network activity.
Note that the Dante connectors are congured for a single, switched network – they cannot be used as primary and
secondary ports on a redundant network.
For more information on Dante networks, see Audinate’s website: http://www.audinate.com/
THIS EQUIPMENT MUST BE
EARTHED BY THE POWER CORD
WARNING
Focusrite
WORD
CLOCK
LOOP
SYNC
OPTICAL 9-16 OPTICAL 1-8
IN OUT IN OUT
IN OUT
SPDIF MONITOR OUTPUTS
PRIMARY PORT
LINE INPUTS 1-8
LINE OUTPUTS 3-10 MIC INPUTS
1234
12
R L
1 2
IN
OUT
THIS EQUIPMENT MUST BE
EARTHED BY THE POWER CORD
WARNING
Focusrite
WORD
CLOCK
LOOP
SYNC OPTICAL 9-16 OPTICAL 1-8
IN OUT IN OUT
IN OUT
SPDIF MONITOR OUTPUTS
PRIMARY PORT
LINE INPUTS 1-8
LINE OUTPUTS 3-10 MIC INPUTS
1234
12
R L
1 2
IN
OUT
THIS EQUIPMENT MUST BE
EARTHED BY THE POWER CORD
WARNING
Focusrite
WORD
CLOCK
LOOP
SYNC OPTICAL 9-16 OPTICAL 1-8
IN OUT IN OUT
IN OUT
SPDIF
MONITOR OUTPUTS
PRIMARY PORT
LINE INPUTS 1-8
LINE OUTPUTS 3-10 MIC INPUTS
1234
12
R L
1 2
IN
OUT
Focusrite Control –
Loopback Signal Routing

14
Monitoring
Monitors
Monitor outputs, at line level, are provided via the 1/4” jack outputs
on the rear panel.
• The Output Encoder will adjust the monitor output level
whenever the Monitor button is illuminated
Monitor Display
The monitor display shows the current volume level and whether
either Dim or Mute is active. ‘Dim’ attenuates the signal by 18dB.
The L/R meter display shows a pre-fade level (the signal level
present before the Output Encoder).
The display also shows the Global Host and Sync settings and their
lock status flags (see ‘Global Settings’ on page 19).
Mute and Dim
Mute and Dim functions are individually enabled via the Monitor
Setup menu. Additionally, the Output Encoder can be programmed
to toggle either the Dim or Mute function when clicked.
Menu activation:
1 Press-and-hold the Monitor button to enter the Setup menu
2 Rotate the Output Encoder to highlight either Dim or Mute
3 Click to select On or Off
4 To exit, press Monitor again (or select the ‘Back’ option)
Toggle Function programming:
1 Enter the Monitor Setup menu as above
2 Rotate to highlight the function to be programmed
3 Press-and-hold the Output Encoder until the confirmation
message appears
The selected function will now toggle on/off each time the Output
Encoder is clicked.
Headphones
Two independent stereo headphone outputs are available on the
front panel.
• To adjust a headphone’s volume level – or to activate Dim or
Mute – press one of the Headphone Select buttons
Also see: Focusrite Control – Monitor Controls, on page 21
For Dim and Mute activation and programming, refer to the ‘Mute and Dim’
section above but substitute ‘Monitor button’ with the appropriate Headphone
Select button.
Internal
L R
-65
Thunderbolt
Mute
Dim
Monitor
Mute
Dim
On Off
On Off
Back
Monitor Display
Monitor Setup Menu
Mute
Press Function
Stored
Headphone Select Buttons
Encoder Toggle Confirmation

15
Meter Display
The centre LCD screen displays eight level meters. These indicate
the internal signal level, after A-D conversion, with 0 dBFS being at
full scale.
A red clip indicator is displayed on channels that reach clipping
point.
Meter Source Selection
To select the source for the 8-channel LCD display:
1 Press the Meter button on the front panel to access the Meter
Source-List
2 Use the Output Encoder to scroll to the required input
3 Click the Output Encoder to make the selection
4 Press Monitor or one of the Headphone Select buttons to exit
Analogue Outputs
8 analogue outputs are provided on the 25-way D-type female connector
on the rear panel.
Analogue outputs are at fixed gain. 0 dBFS corresponds to a signal
level of +18 dBu.
Analogue Inputs [I-8]
I 2 3 4 5 6 7 8
ADAT 1 [1-8]
Network Inputs [1-8]
SPDIF Inputs [1-2]
Analogue Inputs [1-8]
Network Inputs [9-16]
Network Inputs [17-24]
ADAT 2 [9-16]
Meter Source List
THIS EQUIPMENT MUST BE
EARTHED BY THE POWER CORD
WARNING
Focusrite
WORD
CLOCK
LOOP
SYNC OPTICAL 9-16 OPTICAL 1-8
IN OUT IN OUT
IN OUT
SPDIF MONITOR OUTPUTS
PRIMARY PORT
LINE INPUTS 1-8
LINE OUTPUTS 3-10
MIC INPUTS
1234
12
R L
1 2
IN
OUT

16
Thunderbolt Connection
Confirm that Red 4Pre’s Host setting is set to ‘Thunderbolt’, see Global Host Settings on page 19.
Two Thunderbolt 2 connectors are located on the rear panel.
Connect to the host or into the chain using standard Thunderbolt cables
(not supplied).
See appendix 2 on pages 24–26 for the channel I/O allocation tables.
Logic Pro X Setup
• From the menu bar, go to: Logic Pro X > Preferences > Audio...
• Under the Devices tab, set: Input Devices and Output Devices to ‘Focusrite Thunderbolt’
The following steps are optional but will simplify signal routing:
• From the menu bar, go to: Mix > I/O Labels...
• Select the I/O labels to be provided by the driver
THIS EQUIPMENT MUST BE
EARTHED BY THE POWER CORD
WARNING
Focusrite
WORD
CLOCK
LOOP
SYNC OPTICAL 9-16 OPTICAL 1-8
IN OUT IN OUT
IN OUT
SPDIF MONITOR OUTPUTS
PRIMARY PORT
LINE INPUTS 1-8
LINE OUTPUTS 3-10 MIC INPUTS
1234
12
R L
1 2
IN
OUT

17
Pro Tools Connection
Confirm that Red 4Pre’s Host setting is set to ‘Pro Tools’, see Global Host Settings on page 19.
Connect both rear panel PRIMARY ports to a Pro Tools | HDX card using Mini DigiLink cables.
Each Pro Tools | HDX PCI/PCIe card provides two Mini DigiLink ports (giving the card a capacity of 64
inputs and 64 outputs), thus one Red 4Pre may be connected to each card.
A Red 4Pre will appear as four devices in Pro Tools:
A: 1-16
B: 1-16 (Port 1)
C: 1-16
D: 1-16 (Port 2)
A maximum of 3 Red 4Pre units can be connected, giving a
total I/O capability of 174 inputs and 192 outputs.
Note that both Red 4Pre ports are Primary connectors; this means that an additional Pro Tools interface cannot be
added in series – Red 4Pre does not operate in Expansion mode
Using Red 4Pre with other Pro Tools | HD
interfaces
Pro Tools | HD I/O audio interfaces may be used on the same
Pro Tools system as Red 4Pre. Pro Tools interface units can
be added by using additional Pro Tools | HDX PCIe interface
cards.
Connection to a ProTools | HD system would require the use of DigiLink
-to- Mini DigiLink adapter cables.
Loop Sync
It is important when using additional I/O units that the Loop
Sync connection is complete between all units:
• Using 75Ω BNC cables, connect each LOOP SYNC OUT
connector to the LOOP SYNC IN connector on the next
I/O unit
• Complete the chain by connecting LOOP SYNC OUT on
the final I/O unit back to LOOP SYNC IN on the first unit
Focusrite
PRIMARY PORT
12
Mini DigiLink Cables
PRIMARY EXPANSION
Focusrite
PRIMARY PORT
12
PRIMARY EXPANSION
LOOP
SYNC
IN
OUT
LOOP
SYNC
IN
OUT
Focusrite
LOOP
SYNC
IN
OUT

18
Pro Tools Setup
• From the Pro tools menu bar, go to:
Setup > Playback Engine...
• In the Playback Engine menu pop-up,
select: ‘HD Native’
The following steps are optional but will simplify signal routing:
• From the menu bar, go to: Setup > I/O Setup...
• Ensure your input and output routing tables are routed as follows by selecting the Default tab at
the bottom left of the page.
Notes
1. The number of input and output channels available is dependent on the sample frequency (see channel allocation
tables in Appendix 2, pages 24–26
2. The Loopback input is not available on the Pro Tools host mode
3. Output routing using Focusrite Control is not available in the Pro Tools Host mode

19
GLOBAL SETTINGS
Press the Meter and Monitor buttons simultaneously to enter the
global settings menu.
• Rotate the Output Encoder to select a menu item
• Click the Output Encoder to step through the available options
To exit the Global settings screen press the Monitor button (or select
the ‘Back’ option).
Host
Selects the connection used for the DAW host:
• Thunderbolt
• Pro Tools
The Lock status in the Monitor display will show green when locked
to the DAW host.
Note: changing Host type will cause the device to perform a power reset.
Sync
Selects the Red 4Pre’s sync source:
• Internal – internally generated. This is the default selection
• Word Clock – received via the BNC Word Clock In connector
• ADAT 1 – received via the rear Optical In 1-8 connector
• ADAT 2 – received via the rear Optical In 9-16 connector
• S/PDIF – received via the rear S/PDIF In RCA/Phono connector
• Dante – provided by the Dante network connection
• Loop Sync – only applicable when in Pro Tools host mode
When sync is established, the Lock status will change to green. A red status indicates no sync.
Retain
Choose whether the previous phantom power settings are restored on power-up:
• Preamp – all previous settings are returned except the 48V settings, which will be set to Off
• Preamp +48V – all previous settings are returned
Routing
• Advanced Routing – allows remote routing using the Dante Controller application
• Auto Routing – not currently implemented
Sync
Retain
Back
Thunderbolt
Host
Internal
Preamp +48VPreamp
Routing Advanced Routing
Internal
L R
-65
Thunderbolt
Mute
Dim
Monitor
Host and Sync Settings and
Lock Status
Global Settings Menu

20
FOCUSRITE CONTROL
The Focusrite Control application provides remote control of all Red 4Pre’s front panel
hardware functions and system settings via a graphical interface on your DAW. Additionally
– when operating in Thunderbolt host mode – the application provides control of all input
and output routing and mixing functions.
Please note: This manual includes information relating to Red 4Pre’s specic front panel controls and device settings. For
compactness, however, the Mixing and Routing operations are not included here but are fully described in the separate
‘Focusrite Control User Manual’; this manual can be downloaded at the following link:
https://focusrite.com/downloads?product=Red+4Pre
System Requirements
Please visit the following link for up-to-date information on computer and operating system
compatibility for Focusrite Control: Compatibility
Software Installation
The Focusrite Control application for Red 4Pre can be installed as follows:
• Using your browser, go to www.focusrite.com/register.
• Follow the on-screen instructions, entering the “Bundle Code” into the form where prompted.
Your Bundle Code can be found on the back of the Getting Started Guide packed with Red 4Pre.
• Enter the unit’s serial number, which can also be found on the back of the Getting Started Guide.
• You will then be able to access the “My Products” page, where Focusrite Control is available for
download, complete with activation codes where applicable.
• Download and install Focusrite Control, which contains the necessary drivers for your interface.
Follow all on-screen instructions.
• When the installation is complete, you will be prompted to restart your computer.
• After a restart, connect Red 4Pre to your computer with a Thunderbolt cable.
Operation
The software control screen is divided in to two sections:
Device Settings
Refer to the GUI descriptions on the following page.
Mixing & Routing
Please refer to the separate Focusrite Control User Manual – see link above.