Focusrite Red 4Pre Thunderbolt Interface

Limited Time Offer! Get a FREE RedNet AM2 with select Red series interfaces – a $399.99 value! Offer ends September 30.

High-resolution, 58 in x 64 out audio interface with Thunderbolt 2 and Pro Tools | HD support, ultra high-speed Dante networking, and four digitally controlled mic preamps with ISA range “Air” effect.


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SKU: FOCREDNET4PRE Categories: , Brand:


Focusrite’s Red 4Pre is a high-resolution 58 x 64 audio interface with dual Thunderbolt 2 ports, direct connectivity to Pro Tools | HD, Dante audio-over-IP networking, and Focusrite’s lowest latency yet, which enables recording with plug-ins in real time. No audio interface would be complete without analog inputs, and that’s where the Focusrite 4Pre particularly shines. It features four digitally controlled, Red Evolution mic preamps, with Focusrite’s signature “Air” circuitry, created in Focusrite’s ISA range and perfected in the Red Evolution preamps. The lineage of Focusrite’s Red range began with Mr. Rupert Neve designing preamps for George Martin’s Air studios, and now culminates with the Red Evolution preamps, which have astoundingly low self-noise. The Red 4Pre’s ultra low-noise input is further supported and enhanced by Focusrite’s unique dual-path mastering quality conversion, which maintains a balanced signal throughout the chain. The Red 4Pre’s parallel path summing conversion lowers noise and improves output level, resulting in an overall improvement in signal-to-noise ratio of 3dB. The Focusrite Red 4Pre delivers the sound quality, versatility, and control capabilities engineers and producers have relied on that Focusrite has delivered since 1985.

Focusrite Red 4Pre audio interface unique features:

  • Mastering quality, “dual path” converters lower noise floor and increase output
  • Four digitally controlled, Red Evolution mic preamps with ISA “Air”
  • Direct connection to Pro Tools | HD via dual DigiLink connectors

Focusrite Red 4Pre audio interface in one take:

  • 58-in/64-out audio interface
  • Dual Thunderbolt 2 and Avid DigiLink ports
  • Dual Ethernet ports for Dante audio over IP networking for 64 additional channels
  • Software mixer with hardware-focused workflow
  • Focusrite’s lowest round-trip latency allows real-time recording with plug-ins
  • Two individually powered, software controlled headphone outs enable two cue mixes
  • Two instrument DIs
  • Word clock and Loop Sync (Pro Tools HD) I/O
  • Remote control from iPhone or iPad – Download the free Focusrite iOS Control app and adjust cue mixes created with the Focusrite Control desktop app remotely from an iPad, iPhone or iPod touch
  • Red 2 & 3 Plug-In Suite is included as a free download

INSIDE THE BOX—Focusrite Red 4Pre audio interface

Versatile connectivity and expandability

Focusrite’s Red 4Pre is a high-resolution audio interface with 58 input channels and 64 output channels. The Red 4Pre features Thunderbolt 2 connectivity, which enables the lowest round-trip latency regardless of which DAW you use, enabling you to track and overdub with plug-ins and record virtual instruments in real time. A study in simplifying workflow, the Red 4Pre seamlessly integrates with Pro Tools | HD systems and other Avid interfaces via twin primary DigiLink connectors. Since the best things come in twos, the Red 4Pre is also outfitted with dual Thunderbolt 2 ports, which allow daisy chaining of additional peripherals such as hard drives and displays. The Red 4Pre is also equipped with dual Ethernet ports for high-speed, low-latency Dante audio-over-IP networking, letting you expand your recording capability up to 64 additional channels anywhere on your network. Dual Dante ports enable you to connect additional Red or other Dante-compatible components to provide additional channels irrespective of the interface used to drive the Red 4Pre.

Red Evolution Air-enabled Microphone Preamplifiers

The Red Evolution microphone preamps in the Red 4Pre are the latest incarnation and pinnacle of the renowned Focusrite Red range preamps. The Red Evolution preamps are designed to deliver ultra clean, transparent audio with an astounding –129dB EIN (Equivalent Input Noise), which in essence is the heat noise generated by components as electrons pass through them, and an equally astounding 0.0009% THD+N (Total Harmonic Distortion + Noise). The Red Evolution preamps have 63dB of gain for use with any kind of microphone. The Red 4Pre mic preamp can be digitally controlled for adjusting/recalling settings and stereo linking via Focusrite Control software.


Inheriting more than just the name of the Focusrite Red Range, they feature Focusrite’s unique “Air” circuit, a purely analog effect that emulates the sound of the transformer-based mic preamps of the ISA range, the foundations of Focusrite’s “Heritage Sound,” designed by Mr. Rupert Neve for George Martin’s Air studios. Air recreates the sound-shaping effect of the classic ISA transformer by using an authentic analog model of the original transformer-based preamp design. When Air is enabled, the microphone impedance is set to 2.1k ohm and the frequency response curve is given a subtle mid-high boost—all in the analog domain. Engaging Air reconfigures the three-stage preamp signal chain to switch in the correct transformer-style input impedance, followed by a linear gain stage, and finally inserting a passive frequency-shaping stage to recreate the tight low end and elevated high-end response, creating the effect described by audio professionals as the classic “Air” sound of the Focusrite ISA mic pre.

Focusrite’s high-performance dual path conversion

Focusrite has been building mastering-quality ADA converters for decades, and the converters in the Red 4Pre are the best Focusrite has ever made. Maintaining a balanced signal throughout the system, the converters use a parallel-path summing configuration to lower the noise floor. With high-performance, precision conversion chips and maximized sound quality through premium component selection, advanced design and optimized board layout, the Red 4Pre’s converter design strikes a precise balance between multiple factors—including dynamic range, distortion, noise floor and conversion latency—for the optimal overall sound. With 24-bit/192kHz sampling capability and 118dB A-D / 121dB D-A dynamic range, it is ideal for high-resolution audio.

The Red 4Pre delivers a frequency response flat from 20Hz to 35kHz ±0.25 dB or better and ≤0.0009% THD+N—and when Focusrite quotes a specification, you can be sure it’s what the Red 4Pre will actually give you on a real session, not a purely theoretical figure pulled from the converter chip’s data sheet. The incredibly low THD+N is an important factor in maintaining overall mix clarity as track counts soar. Focusrite pays as much attention to the analog side of the equation as to the digital, optimizing noise levels by keeping digital and analog components well apart and using multi-layer boards with internal ground-planes.

Parallel Path Conversion

Parallel-path summing conversion uses two conversion chips in parallel to significantly enhance the signal-to-noise ratio. Using two converters in parallel and summing the result gives an increase in signal level of 6dB (as the two signals are in phase) while random noise is only increased by 3dB (since phase cancellation happens on average 50% of the time). The result: a net improvement of signal/noise ratio of 3dB. The Red 4Pre operates at standard sample rates up to 24-bit/192kHz, ideal for high-resolution audio (HRA), which generally refers to recordings made at 24-bit/96kHz (or 88.2kHz) resolution or better. All Focusrite interfaces can operate at these specifications. HRA is becoming increasingly popular, with music streaming and download sites offering high-resolution content. In addition, high sample rates offer the best option for archiving, which requires the best possible quality before being down-sampled to lossy formats. High-resolution playback is the wave of the future, and archiving music at the highest possible quality provides future listeners the best chance for an even better musical experience.

Dante Networked Expansion

Dante is the audio networking system of choice for Focusrite products including the RedNet range of modules and the Red 4Pre multi-standard interface. Developed by Audinate, a Sydney Australia-based company, Dante is a hardware/software network protocol that delivers uncompressed, multi-channel, near-zero latency digital audio over standard Ethernet networks. Dante has the ability to pass through network routers and provide native gigabit support. Dante provides easy implementation and a cost-saving advantage for studios taking over existing infrastructure with multiple rooms. With Dante, audio can be sent anywhere over existing IT wiring. If changes are required, a single network or fiber-optic cable can carry multiple channels, making it possible to make infrastructure changes relatively quickly and inexpensively, without the need for major construction.

With Dante, you can connect up to 64 additional channels to the Red 4Pre via Ethernet-based networking. A single connection carries both audio and built-in clocking. Whether the Red 4Pre is connected to the computer via Thunderbolt, DigiLink, or Dante, simply connect Dante-equipped units such as two RedNet A16R (32 channels of analogue I/O), four RedNet MP8R (32 channels of RedNet mic pre), or other Dante-enabled products. Place mic preamps where the music is and outputs where the sound needs to go—wherever you have an Ethernet connection. Unlike daisy chaining via Thunderbolt, Dante lets you run additional channels over a greater distance, adding only 150μs of latency to the system, without wasting money on technology or connectivity that will not be used. To minimize time spent on system configuration, Dante makes networking a true plug-and-play process, allowing automatic device discovery and system configuration. Look for future enhancements of the RedNet series offering complete plug and play Ethernet expansion functionality.

With Dante, audio can be made available anywhere it is required, capturing or relaying a live performance or distributing audio to previously hard-to-reach or prohibitively expensive locations.

Focusrite Control software included:

Red 4Pre includes Focusrite Control software, which gives you a clear-cut and intuitive way to set up monitoring and mixes. The software also provides hardware control of the mic pres, setting recall, assigning stereo pairs, adjusting gain, and enabling functions, such as high-pass filtering and phantom power. In addition, Red 4Pre is packaged with Softube’s Time and Tone Bundle, which is a unique plug-in bundle of four professional quality plug-ins, including the Drawmer S73 Intelligent Master Processor, TSAR-1R Reverb, Tube Delay, and Saturation Knob. Also included is the Focusrite Red Plug-in Suite, which gives you the sought-after, classic sound Focusrite’s Red Range 2 and Red Range 3 equalizer and compressor hardware, as heard on countless hit records.

A professional-level audio interface with crystal-clear sound quality, the Focusrite Red 4Pre provides greater expansion capabilities than any other interface in its class. For more information, call or chat with your Westlake Pro Audio representative today.

Focusrite Red 4Pre Specifications:

Supported Sample Rates: 44.1kHz, 48kHz, 88.2kHz, 96kHz, 176.4kHz, 192kHz

System Requirements:

Apple Mac with at least one Thunderbolt or Thunderbolt 2 port Mac OS 10.9 Mavericks, 10.10 Yosemite or 10.11 El Capitan Internet connection for downloading and installing driver 2m Thunderbolt cable included

Simultaneous inputs and outputs
58 x 64 (not including 2 x virtual loopback inputs in Thunderbolt Mode)

Eight channels of analog-to-digital conversion
2 High impedance instrument inputs 4 Red Evolution mic preamps 8 line inputs (D-Sub)

Fourteen channels of digital-to-analog conversion
2 main monitor outputs (TRS) 8 line outputs (D-Sub) 2 stereo headphone outputs

Eighteen channels of digital I/O
16 channels of ADAT I/O via optical connector supports SMUX and SMUXII for operation up to 192 kHz 2 channels of S/PDIF I/O

Dante expansion
32 input channels 32 output channels Compatible via Dante Virtual Soundcard (Not Included) Advanced Mode allows audio routing of any third-party Dante device to and from the Red 4Pre anywhere on your network Auto-routing mode not currently implemented

Dual Thunderbolt 2 ports (2m Thunderbolt Cable included in the box) Dual Digilink for connecting to Pro Tools | HD

Microphone Preamps
4 Red Evolution Mic Preamps ‘AIR’ Mode +48V Phantom Power Switchable HPF Phase Reverse Stereo linking All features controllable from front panel of Red 4Pre and from within Focusrite Control

Microphone Inputs
Connector type: XLR female, pin 2 positive
Phantom Power: +48V phantom power, switchable per mic input
Frequency Response: 20Hz – 35kHz +/-0.2 dB
Signal to noise ratio: 118dB (A-weighted)
Dynamic Range: 118dB (A-weighted)
THD+N: 0.0009%
Noise EIN: –129dBu (A-Weighted)
Maximum input level: +19dBu
Gain Range: 0-63dB (1dB increments from 8dB)
Common mode rejection ratio: >70dB at 997Hz min gain
Input impedance with Air mode off: 6kΩ
Input impedance with Air mode on: 2kΩ

Line Inputs 1-4
Connector type: DB25 female connector balanced
Frequency response: 20Hz – 35kHz +/-0.2dB
Signal to noise ratio: 118dB (A-weighted)
Dynamic range: 118dB (A-weighted)
THD+N: 0.0009%
Maximum input level: +27dBu
Gain Range: 0-63dB (1dB increments from 8dB)
Common mode rejection ratio: >70dB at 997Hz min gain
Input impedance with Air mode off: 10kΩ
Input impedance with Air mode on: 10kΩ

Line Inputs 5-8
Connector type: DB25 female connector balanced
Frequency response: 20Hz – 35kHz +/-0.2dB
Signal to noise ratio: 118dB (A-weighted)
Dynamic range: 118dB (A-weighted)
THD+N: 0.0007%
Maximum input level: +26dBu
Gain range: N/A (fixed gain)
Reference Level: N/A
Common mode rejection ratio: >70dB at 997Hz min gain
Input impedance with Air mode off: 20kΩ
Input impedance with Air mode on: 20kΩ

Instrument Inputs
Connector type: 1/4″ female TS unbalanced
Frequency response: 20Hz – 35kHz +/-0.2dB
Signal to noise ratio: 117dB (A-Weighted)
Dynamic range: 117dB (A-Weighted)
THD+N: 0.0015%
Maximum input level: +15dBu
Gain range: 0-63dB (1dB increments from 8dB)
Input impedance with AIR mode off: Nominal input impedance = 2M ohm
Input impedance with AIR mode on: Nominal input impedance = 2M ohm

Monitor Outputs
Connector type: 1/4″ female TRS balanced
Frequency response: 20Hz – 35kHz +/-0.25dB
Signal to noise ratio: +120dB (A-Weighted)
Dynamic range: +120dB (A-Weighted)
Maximum output level (0dBFS): +18dBu
THD+N: 0.006%
Stereo level balance: 0.02dB@ 997Hz
Output impedance: Nominal output impedance = 136R balanced (68R each phase)

Line Outputs 3-10
Connector type: DB25 female connector balanced
Frequency response: 20Hz – 35kHz +/-0.25dB
Signal to noise ratio: +121dB (A-Weighted)
Dynamic range (line outputs): +121dB (A-Weighted)
Maximum output level (0dBFS): +18dBu
THD+N: 0.0009%
Stereo level balance: 0.02dB @ 997Hz
Output impedance: Nominal output impedance = 136R balanced (68R each phase)

Headphone Outputs
Connector type: 1/4″ female TRS stereo
Signal to noise ratio: 115dB (A-Weighted) @ 270R
Dynamic range: 115dB (A-Weighted) @ 270R
THD+N: 0.01% @ 270R
Maximum output level: +16dBu @ 270R
Max output power: 80mW (+19dBm) @ 270R
Output impedance: 10Ω

Digital I/O
Synchronization sources: Internal, ADAT, S/PDIF, Word Clock, Loop Sync, Dante

Connector type: coaxial RCA
Supported sample rates: 44.1kHz, 48kHz, 88.2kHz, 96kHz, 176.4kHz, 192kHz

Connector type: optical TOSLINK
Format: ADAT digital lightpipe with S/MUX
Supported sample rates: 44.1kHz, 48kHz, 88.2kHz, 96kHz, 176.4kHz, 192kHz
Channel Assignments @ 44.1 kHz, 48 kHz Port 1 = Channels 1 – 8, Port 2 = 9 – 16 Channel Assignments @ 88.2 kHz, 96 kHz Port 1 = Channels 1 – 4, Port 2 = 5 – 8 Channel Assignments @ 176.4 kHz, 192 kHz Port 1 = Channels 1 – 2, Port 2 = Channels 3 – 4

Word Clock
Connector type: BNC
Word clock input termination: 75 ohm

AC Input connector type: male IEC
AC Requirements: 100 – 240V AC, 50 – 60Hz
Max power consumption: 35W

1U rack mountable

Weights and Dimensions of unboxed unit

Dimensions (H-W-D): 1-11/16″ x 19″ x 13-5/16″ (44 mm x 483 mm x 340 mm)

Weight (without accessories): 4.59kg

Weights and Dimensions of boxed unit

Dimensions (H-W-D): 4-5/16″ x 23-19/32″ x 18-5/16″ (110 mm x 600 mm x 465 mm)

Weight: 14.1 lb. (6.4 kg)

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