Scarlett 18i20 4th Gen

Studio Recording Inputs
Record vocals, guitars, drums, synths, and other instruments through a flexible set of audio inputs.

Auto Gain
Set recording levels quickly without guesswork. The interface listens to your performance and chooses a clean level.

Clip Safe
Protect your recordings from harsh distortion. The interface can lower input gain when a signal gets too loud.

Air Modes
Add extra presence and character to vocals and instruments. This helps recordings sound clearer and more polished.

Independent Headphone Mixes
Create separate headphone mixes for different performers. This makes it easier for each person to hear what they need.

Speaker Switching
Switch between two sets of monitor speakers from the front panel. This helps you check how your mix sounds on different speakers.

Talkback
Speak to performers through their headphones using the built-in talkback mic. This makes studio communication simple.

Loopback Recording
Record computer audio directly into your recording software. This is useful for streaming, podcasts, sampling, and screen recording.

Standalone Mode
Use the interface without a computer after setup. This is helpful for simple routing, live setups, or expanding another system.

Control Software
Manage routing, mixes, presets, and device settings from Focusrite Control 2. It gives you clear control over how audio moves through the interface.

Pro Tools Intro+ for Focusrite
Create music with essential audio and MIDI tools, plus a wide selection of effects and instrument plugins.

Ableton Live Lite
Start making music with instruments, effects, and creative tools for building ideas and performances.

Cubase LE
Record, arrange, and produce songs with a streamlined music production workspace.

Splice Sounds
Access a large library of royalty-free sounds, loops, and presets for adding fresh ideas to your projects.

Hitmaker Expansion
Create polished vocals, guitars, synths, and drums with a collection of studio-style production tools.

General Specifications
Device Type: USB audio interface
Audio Interface I/O: 18-in / 20-out
Supported Sample Rates: 44.1 kHz, 48 kHz, 88.2 kHz, 96 kHz, 176.4 kHz, 192 kHz
Bit Depth: 24-bit
Computer Connection: USB-C
Control Software: Focusrite Control 2
Standalone Mode: Yes
Rack Mounting: Standard 19 in rack

Microphone Inputs
Input Count: 8
Connector Type: Neutrik Combo XLR / 6.35 mm TRS
Frequency Response: 20 Hz – 20 kHz ±0.06 dB
Dynamic Range: 116 dB A-weighted
THD+N: -100 dB @ 8 dB gain
EIN: -127 dBu A-weighted
Maximum Input Level: 16 dBu
Gain Range: 69 dB
Input Impedance: 3 kΩ
Phantom Power: 48 V per channel

Line Inputs
Input Count: 8
Connector Type: Neutrik Combo XLR / 6.35 mm TRS
Frequency Response: 20 Hz – 20 kHz ±0.05 dB
Dynamic Range: 115.5 dB A-weighted
THD+N: -100 dB @ 8 dB gain
Maximum Input Level: 22 dBu
Gain Range: 69 dB
Input Impedance: 24 kΩ

Instrument Inputs
Input Count: 2
Connector Type: Front-panel 6.35 mm jack
Frequency Response: 20 Hz – 20 kHz ±0.05 dB
Dynamic Range: 113 dB A-weighted
THD+N: -80 dB @ minimum gain
Maximum Input Level: 12 dBu
Gain Range: 62 dB
Input Impedance: 1 MΩ

Line Outputs
Output Count: 10
Connector Type: 6.35 mm balanced jack
Speaker Outputs: 4
Additional Line Outputs: 6
Frequency Response: 20 Hz – 20 kHz ±0.02 dB
Dynamic Range: 122 dB A-weighted
THD+N: -112 dB
Maximum Output Level: 16 dBu
Output Impedance: 200 Ω

Headphone Outputs
Output Count: 2
Connector Type: Front-panel stereo 6.35 mm TRS
Frequency Response: 20 Hz – 20 kHz ±0.1 dB @ 33 Ω / 300 Ω
Dynamic Range: 112 dB A-weighted @ 33 Ω
Dynamic Range: 116 dB A-weighted @ 300 Ω
THD+N: -100 dB @ 33 Ω minimum
THD+N: -110 dB @ 300 Ω minimum
Maximum Output Level: 5 dBu into 33 Ω
Maximum Output Level: 11 dBu into 300 Ω
Maximum Output Power: 57 mW into 33 Ω
Maximum Output Power: 27 mW into 300 Ω
Output Impedance: 11 Ω

Digital I/O
ADAT: 8 channels @ 44.1 / 48 kHz
ADAT: 8 channels @ 88.2 / 96 kHz
ADAT: Disabled @ 176.4 / 192 kHz
S/PDIF: 2-channel coaxial
S/PDIF Maximum Sample Rate: 96 kHz
Word Clock: BNC output
MIDI: 5-pin DIN input and output
Loopback: 2 channels

Front Panel Controls
Input Selection: Channels 1–8
Input Gain: Encoder control
Phantom Power: 48 V button
Instrument Mode: Inst button
Auto Gain: Auto button
Clip Protection: Safe button
Air Mode: Air button
Speaker Switching: Alt button
Dim: -18 dB
Mute: Yes
Talkback: Built-in microphone with Talk button
Output Control: Digitally controlled encoder
Headphone Level Controls: 2

Air Modes
Air Off: Clean preamp
Air Presence: Analogue presence boost
Air Presence and Harmonic Drive: Presence boost with added harmonics
Air Presence and Harmonic Drive Availability: Up to 96 kHz

Metering
Analogue Input Meters: 8
Output Meters: 8 selectable output meters
Main Output Meters: L / R
Meter Scale: -42 dBFS to 0 dBFS
Output Control Indicator: Three-colour LED ring
USB Status Indicator: Yes
Sync Status Indicator: Yes

Software Features
Routing Control: Focusrite Control 2
Mixer Control: Focusrite Control 2
Preset Support: Yes
Firmware Updates: Focusrite Control 2
Remote Control App: iOS and Android
Auto Gain: Single-channel and multichannel
Clip Safe Availability: Up to 96 kHz
Talkback Routing: Assignable to mixes
Speaker Switching: Main / Alt monitor switching

Physical Specifications
Weight: 3.3 kg / 7.29 lb
Height: 47 mm / 1.83 in
Width: 442 mm / 17.4 in
Depth: 260 mm / 10.23 in
Operating Temperature: 40°C / 104°F maximum ambient

Power
Power Input: IEC mains
Power Switch: Front panel
Included Power Cable: Country-specific IEC