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Silver rectangular rackmount audio interface with front panel knobs, meters and headphone sockets

Focusrite

Focusrite Scarlett 18i20 18-in 20-out USB-C Audio MIDI Interface

SKU CH-KV27-7HH5S

18-in 20-out USB-C audio and MIDI interface with eight mic preamps, 69 dB gain, 24-bit 192 kHz conversion and 122 dB dynamic range

  • 8 mic/line preamps with up to 69 dB gain for clean recordings
  • 24-bit / 192 kHz conversion delivers 122 dB dynamic range
  • Auto Gain and Clip Safe modes keep every take usable
  • 18 inputs and 20 outputs plus ADAT and S/PDIF for studio expansion
  • Two headphone outputs and speaker switching simplify monitoring

18-in 20-out USB-C interface for producers

The Scarlett 18i20 (4th Generation) provides 18 inputs and 20 outputs for recording, podcasting and streaming. Eight mic/line preamps with up to 69 dB gain and two Hi-Z instrument inputs handle microphones, guitars and line-level gear. Two headphone outputs and ten line outputs support monitoring and external processors. ADAT and S/PDIF I/O plus wordclock Out expand connectivity for studio integration.

Before ordering check your setup

Verify the host computer or iPad has a USB-C port and supplies enough bus power for operation. Confirm your DAW supports the 24-bit / 192 kHz sample rate and ASIO or Core Audio drivers on Windows and macOS. Ensure you have cables for the eight XLR/TRS combo inputs, two instrument jacks and ten TRS line outputs. ADAT optical and S/PDIF coaxial connections require matching ports on external converters or effects units.

Sustained-load behaviour

RedNet 24-bit / 192 kHz AD/DA converters deliver a dynamic range up to 122 dB during long sessions. Auto Gain sets levels automatically and Clip Safe prevents digital clipping when signals peak unexpectedly. Virtual Loopback routes computer audio back into the DAW without extra cables. Built-in talkback mic and speaker switching stay responsive over extended use. External power supply keeps performance stable when the interface is fully populated.

Highlights

  • 8 mic/line preamps with up to 69 dB gain for clean recordings
  • 24-bit / 192 kHz conversion delivers 122 dB dynamic range
  • Auto Gain and Clip Safe modes keep every take usable
  • 18 inputs and 20 outputs plus ADAT and S/PDIF for studio expansion
  • Two headphone outputs and speaker switching simplify monitoring

Specifications

No published specifications for this item yet.

Questions about this item

Does the box include cables or do I need to buy a USB-C cable separately?

The interface ships with a USB-C cable and external power supply so it works straight from the box on Mac, Windows or iPadOS.

How do I choose between the 18-in and 20-out counts when planning my studio?

Eighteen inputs cover eight mic/line preamps, two instrument inputs and eight ADAT channels, while twenty outputs give ten line outs, two headphone outs, eight ADAT returns and S/PDIF.

What does the 122 dB dynamic range mean when I am tracking a full band?

It matches pro-studio converter quality, so quiet passages stay clean and loud transients up to 192 kHz / 24-bit never clip when gain is set by the 69 dB preamps.

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