Detail 01
18 inputs / 20 outputs
Provides substantial I/O for complex recording and routing setups.
Product detailSKU #1500000439315
FocusriteScarlett 18i20 4th Gen USB-C Audio Interface
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Independent shopping perspective
The Korena take
Scarlett 18i20 4th Gen is a USB-C interface for recording full bands and more involved studio setups. Eight mic preamps, two high-impedance instrument inputs, and 18 inputs/20 outputs provide the connections for microphones, instruments, keyboards, and drum machines. ADAT, S/PDIF, MIDI, and word clock I/O extend the routing options, while 24-bit/192kHz conversion handles high-resolution recording. Focusrite Control gives you routing, monitoring, and preamp-gain control from desktop or mobile devices, with Auto Gain and Clip Safe available for level management.
Strong match
Who this is for
- Recording full-band sessions requiring eight microphone preamps and expandable digital I/O.
- Studio routing that combines microphones, instruments, keyboards, drum machines, MIDI, and synchronized digital devices.
- Rack or desktop setups needing talkback plus two headphone outputs for monitored recording sessions.
What matters in use
The specifications, translated
Catalog numbers tell only part of the story. These are the details most likely to change how this product feels, sounds, or fits into a setup.
Detail 02
Eight mic preamps
Eight microphone sources can connect through the onboard preamps.
Detail 03
ADAT I/O
Two ADAT inputs and two ADAT outputs support expansion; each carries 16 channels at 44.1/48kHz or up to eight at 96kHz.
Detail 04
1U desktop / rack-mountable
It can be used on a desktop or installed in a 1U rack space.
Detail 05
Independent phantom power
Phantom power is available independently.
Detail 06
Two headphone outputs
Provides two dedicated headphone outputs.
Final check
Know before you order
- 01It requires external 30W power; it is not bus powered.
- 02Focusrite Control is supported on macOS, Windows, iOS, and Android.
- 03The interface uses USB Type-C connectivity and USB 2.0 protocol.
Product questions
Before you decide
Straight answers to the questions shoppers most often ask about this product.
01How many microphone preamps does it have?
It has eight microphone preamps.
02Can it expand through ADAT?
Yes. It has two ADAT inputs and two ADAT outputs, supporting 16 channels at 44.1/48kHz or up to eight at 96kHz.
03Does it include software?
Yes. The included package lists Ableton Live Lite, Pro Tools Intro+, Splice Sounds Membership, and additional plug-ins including Red 2 & 3, Softube Amp Room, Relab LX480 Essentials, and Auto-Tune Access.
04Is it bus powered?
No. It requires external 30W power.
Reference
Full specifications
The complete catalog record, organized around the decisions musicians make when comparing gear.
1 detailsSound
- Frequency Response
- 20Hz–20kHz ±0.1dB @ 33 ohm / 300 ohm
2 detailsPickups & controls
- Microphone Preamps
- 8
- Number of Microphone Preamps
- 8
2 detailsBody & build
- Loopback
- Yes
- Talkback
- Yes
23 detailsConnections & power
- Phantom Power
- Yes (independent)
- Spdif Input
- 2
- Spdif Output
- 2
- Headphone Outputs
- 2
- Connectivity
- USB Type-C
- External Power Requirement
- 30W
- Supported Sample Rates
- 44.1kHz, 48kHz, 88.2kHz, 96kHz, 176.4kHz, 192kHz
- Instrument Inputs
- 2
- Adat Inputs
- 2 (16 channels at 44.1/48kHz, up to 8 channels at 96kHz)
- MIDI Outputs
- 1
- Input Impedance
- 1 Mohm
- Output Impedance
- 11 ohm
- S Pdif Inputs
- 1
- S Pdif Outputs
- 1
- Line Outputs
- 10
- Line Inputs
- 8
- Bus Powered
- No
- Maximum Output Level
- +11dBu into 300 ohm
- MIDI Inputs
- 1
- Adat Outputs
- 2 (16 channels at 44.1/48kHz, up to 8 channels at 96kHz)
- Maximum Output Power
- 27mW into 300 ohm
- Equivalent Input Noise Ein
- -127dBu (A-weighted)
- Maximum Input Level
- +12dBu
2 detailsSize & weight
- Weight
- 7.3
- Dimensions
- 17.4 inch × 10.2 inch × 1.8 inch
1 detailsIn the box
- Clip Safe
- ✓ Included
14 detailsOther
- A D Resolution
- 24-bit/192kHz
- Thd N
- -115dB
- Air Mode
- Yes
- Protocol
- USB 2.0
- Model
- Scarlett 18i20 4th Gen
- Macos
- Apple Silicon and Intel processors supported
- Xln Audio Addictive Drums 2
- Studio Rock
- Simultaneous I O
- 26 × 26
- Gain Range
- 62dB
- Dynamic Range
- 130dB (A-weighted)
- Windows
- Intel, AMD, and Arm64 processors supported
- Auto Gain
- Yes
- Product Type
- USB audio interface
- Form Factor
- Desktop / Rack Mountable (1U)
