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Focusrite Scarlett 18i20 Rackmount 18x20 USB Type-C Audio/MIDI Interface (3rd Generation)

Focusrite Scarlett 18i20 Rackmount 18x20 USB Type-C Audio/MIDI Interface (3rd Generation)
Key Features
  • Bands and Project Studios
  • USB Type-C / Type-A Connectivity
  • 8 Scarlett Mic/Line Preamps, 2 Hi-Z Ins
  • Dual Headphone Outs, 10 Line Outs
Built to deliver top-shelf sound in a rack-friendly and easy-to-use format for bands, project studio engineers, and panel podcasters who need mix-minus functionality when taking calls, the third-generation Focusrite Scarlett 18i20 18x20 USB audio/MIDI interface lets artists, engineers, and producers score pro-level tone with no learning curve.
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Focusrite 18i20 Overview

  • 1Description
  • 2Great for Bands, Project Studios, and Large Home Setups
  • 3Pristine, High-Resolution Conversion
  • 4Scarlett Mic Preamps with Customizable Tone
  • 5Instrument/Line Switching
  • 6Straightforward Controls and Level Indication
  • 7Dual Independent Headphone and Main/Alt Monitor Outputs
  • 8Rear-Panel Line Outputs
  • 9Virtual Loopback for Mix-Minus and More
  • 10MIDI I/O
  • 11Stereo S/PDIF Digital I/O
  • 128-Channel ADAT Optical I/O
  • 13Wordclock Output
  • 14Powerful Software Control
  • 15All the Tools You Need to Start Recording

Built to deliver top-shelf sound in a rack-friendly and easy-to-use format for bands, project studio engineers, and panel podcasters who need mix-minus functionality when taking calls, the third-generation Focusrite Scarlett 18i20 18x20 USB audio/MIDI interface lets artists, engineers, and producers score pro-level tone with no learning curve.

Equally capable for tracking vocals and instruments, the eight improved Scarlett microphone preamps feature switchable phantom power for condenser mics, pads to prevent distortion on loud input signals, and a selectable-per-channel Air circuit, which adds clarity-enhancing brightness based on Focusrite's legendary ISA preamplifier.

The first two XLR-1/4" combo inputs can accept unbalanced instrument level from guitars, basses, synthesizers, and drum machines, or balanced line level from a mixing console or outboard preamps, while combo inputs 3-8 support mic- or line-level sources.

Unlocking the ability to record at standard CD quality or high-fidelity resolutions, the 24-bit / 192 kHz AD/DA converters ensure that signals are captured and reproduced with detail and accuracy. With four balanced 1/4" line/monitor outputs, six additional 1/4" line outs, two 1/4" stereo headphone jacks, and independent volume control of the two headphone outputs and the main/alt speaker outs, the Scarlett 18i20 can simultaneously feed multiple monitoring systems and outboard effects processors with ease.

The virtual loopback function on the Scarlett 18i20 empowers podcasters with an easy mix-minus setup for taking calls without the caller being distracted by a delayed audio return signal. Plus, the onboard talkback feature and built-in talkback mic streamline the task of communicating with your artists during recording sessions. You can even utilize your iPad, iPhone, or iPod touch to wirelessly control the Scarlett 18i20.

Utilize the dual ADAT optical input and output ports to interface external 8-channel AD/DA converters (available separately). Traditional 5-pin MIDI I/O is provided for seamless integration of MIDI equipment such as a keyboard or sound module, and S/PDIF coaxial ports allow proper routing of stereo digital gear.

With its AC powering for stable power in the studio, space-saving USB Type-C connection, and extensive software bundle including elementary versions of Ableton Live and Avid Pro Tools music production workstations, virtual instruments, plug-in effects, loops, and more, the Scarlett 18i20 gives you plenty of powerful tools to kick-start your inspiration. Just connect the Scarlett 18i20 to an AC power source via the supplied power cable, plug into your Mac/Windows computer via USB, fire up your preferred audio recording software, and let the creativity flow.

Great for Bands, Project Studios, and Large Home Setups

With its 1 RU size, USB Type-C connectivity, and AC powering (via the included power cable), the Scarlett 18i20 is well suited for bands, project studios, and large home setups in need of plenty of analog and digital I/O in a rackmountable form factor.

Pristine, High-Resolution Conversion

Thanks to its high-performance 24-bit / 192 kHz AD/DA converters, the Scarlett 18i20 is equipped to capture any source from vocals to acoustic and electric instruments clearly and accurately, so you never have to worry about the interface clouding your sound.

Scarlett Mic Preamps with Customizable Tone

The eight upgraded third-generation Scarlett mic preamps feature switchable 48V phantom power (in banks of four channels) to accommodate your favorite condenser mics, and a selectable-per-channel Air setting, which reproduces the Air effect of Focusrite's original ISA mic preamp to impart enhanced brightness and openness on your vocal recordings. Use the selectable input pads to prevent distortion when tracking high-level sources such as acoustic drums or electric guitars equipped with active pickups.

Instrument/Line Switching

Thanks to switchable instrument/line settings, the first two XLR-1/4" combo inputs on the Scarlett 18i20's front panel allow distortion-free recording of instruments such as electric guitar and bass, synthesizers, or drum machines with no need for DI boxes or amplifiers, or in Line mode they can be used for line-level sources like a mixer's stereo output or the line outs from external mic preamps or guitar/bass amps. Combo inputs 3-8 are able to handle mic- or line-level sources.

Straightforward Controls and Level Indication

The Scarlett 18i20's independent gain knobs and 5-segment LED input meters mean that you'll have no trouble getting set up and dialing in the perfect levels.

Dual Independent Headphone and Main/Alt Monitor Outputs

The first four balanced 1/4" TRS monitor outputs on the rear panel enable hum-free connectivity with two pairs of balanced studio monitors, and their anti-thump technology protects your speakers if the interface is powered on while the speakers are powered on. To allow critical listening through headphones for two people, there are two front-panel 1/4" headphone jacks, each with its own dedicated volume knob. Another knob is allocated for controlling the volume of the main monitor outputs (1-2) or the alt monitor outputs (3-4), and buttons are provided for dim and mute functions.

Rear-Panel Line Outputs

Six additional balanced 1/4" TRS line outputs can be found on the rear panel of the Scarlett 18i20. Use these to route tracks from your session into separate analog inputs on a console or summing mixer, or to feed outboard effects processors.

Virtual Loopback for Mix-Minus and More

The Scarlett 18i20 features one pair of virtual loopback inputs, allowing you to capture a stereo feed of any combination of hardware input and software playback channels, making podcasting, live streaming, and sampling tasks much easier.


Spin the Scarlett 18i20 around and you'll find traditional 5-pin MIDI I/O ports, perfect for hooking up a MIDI keyboard controller, a synthesizer/workstation, or a sound module for MIDI recording, editing, and sequencing.

Stereo S/PDIF Digital I/O

In addition to having flexible analog I/O, the Scarlett 18i20 offers S/PDIF stereo digital input and output ports via coaxial jacks. Use the S/PDIF input to record the output of a digital DJ mixer or an external mic preamp outfitted with an A/D converter and S/PDIF output. Run the Scarlett's S/PDIF output to a high-end D/A converter for extra processing or mastering with analog gear.

8-Channel ADAT Optical I/O

The inclusion of dual ADAT optical input ports on the Scarlett 18i20 means that you can record up to eight more channels of audio at up to 96 kHz (four channels at 192 kHz), a perfect way to pipe in an external 8-channel mic preamp with an onboard A/D converter.

Dual ADAT optical outputs are also present, should you wish to send tracks digitally (skipping a D/A stage) to a headphone distribution system, an external converter, or a digital mixer.

Wordclock Output

A BNC output provides a stable wordclock signal for synchronization of external digital equipment such as other audio interfaces or a digital mixing console.

Powerful Software Control

Route your audio, cue mix, loopback, and monitor mixes from your Mac or Windows computer via the Focusrite Control desktop software. Tap into even more convenience by using the Focusrite Control iOS app on your iPad, iPhone, or iPod touch to remotely control your Scarlett when connected to Focusrite Control Desktop.

All the Tools You Need to Start Recording

The Scarlett line of interfaces comes with some of the best loved software tools in the business. Click here to see the complete list!
UPC: 815301005216

Focusrite 18i20 Specs

Form FactorRackmount (Rack-Mountable with Included Hardware)
Display8 x Multi-Segment LED Meter
Channels of I/OAnalog:
8 Inputs / 10 Outputs
10 Inputs / 10 Outputs
Maximum Sampling Rate192 kHz / 24-Bit
Number of Microphone Preamps8 Preamps
Input Level Adjustment8 x Knob
Expansion SlotsNone
Signal Processing
Pad-10 dB (Switchable per Channel)
Gain/Trim RangeMic/Line Inputs:
56 dB
High-Pass FilterNone
Solo/MuteMute per Master
Analog Audio I/O2 x Combo XLR-1/4" TRS Balanced/Unbalanced Mic/Line/Hi-Z Input
6 x Combo XLR-1/4" TRS Balanced Mic/Line Input
10 x 1/4" TRS Balanced/Unbalanced Line/Monitor Output
2 x 1/4" TRS Unbalanced Headphone Output
Phantom Power48 V, Selectable On/Off (on 8 Channels)
Digital Audio I/O1 x RCA Coaxial S/PDIF Input
1 x RCA Coaxial S/PDIF Output
1 x TOSLINK Optical ADAT / S/PDIF Input (S/MUX Support)
1 x TOSLINK Optical ADAT Input (S/MUX Support)
1 x TOSLINK Optical ADAT / S/PDIF Output (S/MUX Support)
1 x TOSLINK Optical ADAT Output (S/MUX Support)
Host Connection / USB1 x USB Type-C (USB 2.0)
USB (Non-Host)None
Sync I/O1 x BNC Word Clock Output
Network I/ONone
MIDI I/O1 x DIN 5-Pin Input
1 x DIN 5-Pin Output
Wireless ConnectivityNone
Frequency Response20 Hz to 20 kHz ±0.1 dB
Maximum Input LevelMic Inputs:
+9 dBu (Min Gain)
+16 dBu (Min Gain, with Pad)
Hi-Z Inputs:
+12.5 dBu (Min Gain)
+14 dBu (Min Gain, with Pad)
Line Inputs:
+22 dBu (Min Gain)
+29 dBu (Min Gain, with Pad)
Maximum Output LevelLine Outputs:
+15.5 dBu (Balanced)
Headphone Outputs:
+7 dBu
ImpedanceMic Inputs:
3 Kilohms
Hi-Z Inputs:
1.5 Megohms
Line Inputs:
60 Kilohms
Line Outputs:
430 Ohms
Headphone Outputs:
< 1 Ohm
Dynamic RangeMic Inputs:
111 dBA
Hi-Z Inputs:
110 dBA
Line Inputs:
110.5 dBA
Line Outputs:
108.5 dBA
Headphone Outputs:
104 dBA
THD+NMic Inputs:
< 0.0012%
Hi-Z Inputs:
< 0.03%
Line Inputs:
< 0.002%
Line Outputs:
< 0.002%
Headphone Outputs:
< 0.002%
EINMic Inputs:
-128 dB A-Weighted
Digital Audio
Sample RatesUp to 192 kHz (AD/DA Conversion)
Sample Rate ConversionNone
Bit DepthsUp to 24-Bit (AD/DA Conversion)
Sync SourcesADAT, Internal, S/PDIF
Audio Storage & Playback
Memory Card SlotNone
OS CompatibilitymacOS 10.12
macOS 10.13
macOS 10.14
macOS 10.15
macOS 11
Windows 7 or Later
*As of March, 2022: Check with manufacturer for the most up-to-date compatibility
Included SoftwareAbleton Live Lite
Pro Tools First
Compatible Software (Not Included)Any Core Audio (Mac) Compliant Software
Included Plug-InsDynamics:
Focusrite Red 3
Drawmer S73
Focusrite Red 2
Virtual Instruments:
XLN Audio
Reverb & Room:
Softube TSAR-1R Reverb
Softube Tube Delay
Harmonic & Tape:
Softube Saturation Knob
Supported Drivers/API & Plug-InsCore Audio (Mac)
Mobile Device CompatibilityNone
Required HardwareAvailable USB 2.0 Port
USB Cable (Included)
Internet ConnectionRequired for Software/Driver Download
Power RequirementsAC Input
AC Input Power100 to 240 VAC, 50 / 60 Hz
Power Consumption30 W
Rackmount Size1 RU (with Included Hardware)
Dimensions19 x 10.23 x 1.83" / 48.3 x 25.98 x 4.65 cm
Weight7.2 lb / 3.3 kg
Packaging Info
Package Weight9.8 lb
Box Dimensions (LxWxH)23.7 x 12.8 x 3.5"

Focusrite 18i20 Reviews

Works perfect for 5.1 or 7.1 surround in DAW, games, movies!

By Daniel
Rated 5 out of 5
Date: 2022-03-22

As most of you have noticed by now, it's extremely difficult to find software drivers in an audio interface that also work with 5.1 or 7.1 surround sound in Windows. Focusrite makes awesome drivers for Windows that work in both ASIO and WDM. I previously fought for over two years with an expensive Antelope Discreet 8 Synergy Core interface. Antelope's drivers on Windows are slow and unreliable AND they do not work in any way for 5.1 surround setups outside of the DAW. I consulted with the Antelope audio engineers and they said that their drivers will not work for 5.1 games or movies. I'm never buying another Antelope interface ever again! The Antelope hardware is great, but the drivers are garbage for Windows users. There's a night and day different between Antelope's drivers and Focusrite's drivers in Windows. The Focusrite Control software also searches and handles any firmware updates automatically. After you install the Focusrite Control drivers, in you Windows Sound options you can click on the Focusrite USB driver and get a Configure button at the bottom. Clicking on that Configure button takes you to the Speaker Configuration where you have the following choices: Stereo, Quadraphonic, 5.1 Surround, and 7.1 Surround. From there any games you play that have 5.1 surround like, Alien Isolation, Division 2, Tome Raider, etc. will work perfectly! Also movies going through my Cyberlink Power DVD software sound amazing! By the way, for my setup, I'm running the Scarlet 18i20 3rd Gen, two Adam A77Xs and three Adam A7Xs (looking to also get an Adam Sub8 in the near future). So if you are a 5.1 sound junky like I am, and you want your DAW, your games, and your movies to run through your audio interface with reliable drivers that just work in Windows... then you'll want to stick with Focusrite!


By Renaldo
Rated 5 out of 5
Date: 2021-06-24

EXCEEDED MY EXPECTATION, great sound quality and many options to do an awesome final Job. An HOW it looks on my Rack, Wow a piece of ART.

Just Plain Awesome!

By Alejandro
Rated 5 out of 5
Date: 2021-05-05

This was one of the best purchases I have ever made. Pre amps are amazing, plenty of outputs and flexibility. Sleek and love the meters!

Amazing interface

By Christine
Rated 5 out of 5
Date: 2021-04-21

Great value for the pricepoint.

Great product!

By Mark T
Rated 5 out of 5
Date: 2021-03-25

I am using the Focusrite Scarlett 18i20 along with varous dynamic and condenser mics to record and listen back to my drumming practice sessions. It is easy to setup and the sound is crystal clear.

Great Product

By Sebastian
Rated 5 out of 5
Date: 2021-01-12

Easy to setup, and it sound incredible for not much money. recommended


By Paul
Rated 5 out of 5
Date: 2022-02-03

Does what I need and can be expandable

Best Option For Multi-device recordings

By Charles
Rated 5 out of 5
Date: 2021-11-12

The Scarlett 18i20 Audio Interface is the best option if you're recording with multiple mics and instruments. Don't even consider anything else! B&H offers the best price, delivery and service of anyone as well... so don't waste your time - shop and purchase with B&H and you can't go wrong. I've been buying photo, computer and sound/recording equipment from them for over 20 years and never had a single bad experience ever!

See any errors on this page? Let us know


Might be a dumb question but can I use this with ...

Might be a dumb question but can I use this with an older ( 2012 )MacBook that uses the larger USB ports with just an adapter cable?
Asked by: Eric
Yes this will work with your Macbook no problem The Focusrite scarlett 18i20 comes with the USB cable which is type A that will plug into your mac.
Answered by: Raul M
Date published: 2021-10-06

Does the Focusrite Control software allow you to ...

Does the Focusrite Control software allow you to customize delay on the outputs on the back of the unit? Im a livestreamer so I usually need to delay my audio by 110ms to sync it with video going into my switcher.
Asked by: Theodore
No, the Focusrite Scarlett 18i20 USB Audio/MIDI Interface does not offer the option to delay the audio sent through the outputs using the Focusrite Control software. Those options are typically provided as settings in the livestream software or as a plug-in for the software.
Answered by: Lisa
Date published: 2021-11-22

hi. can i send stems from my daw through this ...

hi. can i send stems from my daw through this unit to be processed on an outboard mixer and have the processing recorded back. how is the ad/da conversion
Asked by: Elykingz
You can run audio tracks out of your DAW through this interface to then go out through the balanced line outputs. The processed audio can go back into the line inputs to record in your computer. The AD/DA conversion is very good.
Answered by: Steve
Date published: 2019-07-17

It says it comes with Abelton Live Lite, but ...

It says it comes with Abelton Live Lite, but isn't that a free on Abelton's website? Why do they mean when it comes with a license to a free program?
Asked by: David
The 18i20 includes a bundle code which allows you to download several different software programs such as an exclusive Focusrite edition of Pro Tools | First Pack, Ableton Live Lite, the Softube Time and Tone Bundle, Foscusrite's Red Plug-In Suite, and a library of LoopMasters samples. So the included bundle code allows you to access more software than just Ableton Live Lite.
Answered by: Lisa
Date published: 2019-07-14


Can you bypass the Mix Control software and use Pro Tools only to control mix on second generation?
Asked by: J. William W.
To control the mix of what you want to hear on the headphones or main out, the focusrite software is used.To record you can use pro tools, reaper or other DAW
Answered by: Lucas D.
Date published: 2018-08-26


No reason it won't work with Adobe Audition... right?
Asked by: Douglas W.
The Focusrite Scarlett series interfaces work seamlessly with most DAW software. Adobe Audition should have no issues as well.
Answered by: Jeff P.
Date published: 2018-08-26


On Windows 8.1, do the different channels appear in separate devices or do they show up as separate channels on a single device?
Asked by: Tim S.
Tim, These use a focusright scarlett software as a controller that displays all the channels in a single mixer style software consol. Regards,Rob
Answered by: Robert M.
Date published: 2018-08-28


Does it have a TRS phone insert?
Asked by: Kyle K.
This unit does not have a TRS insert.
Answered by: Keith P.
Date published: 2018-08-26
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