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Focusrite Scarlett 18i20 4th Gen USB Audio Interface with Software Suite

High‑performance USB audio interface with 18 inputs and 20 outputs, offering crystal‑clear analog-to-digital conversion, low latency, robust preamps, and bundled software for professional recording and mixing

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Focusrite Scarlett 18i20 4th Gen USB Audio Interface

The Focusrite Scarlett 18i20 4th Generation is a powerhouse designed for professional‑grade recording, mixing, and broadcasting. With its expansive input/output matrix, crystal‑clear converters, and bundled software suite, it delivers studio quality sound in a compact, user‑friendly package.

Key Features at a Glance

  • 18 inputs / 20 outputs – 8 mic preamps, 2 instrument inputs, 8 line/ADAT channels, and 4 monitor outputs.
  • 24‑bit / 192 kHz conversion – ensures pristine audio fidelity across all signal paths.
  • Low latency performanceUSB‑C connectivity delivers sub‑10 ms round‑trip latency for real‑time monitoring.
  • Focusrite Air mode – adds a subtle harmonic boost to vocals and instruments, emulating the classic Scarlett “Air” sound.
  • High‑quality preamps – each mic input features Focusrite’s renowned clean, transparent preamp design with up to +24 dB gain.
  • ADAT optical I/O – expand your session by connecting additional line inputs or outputs via ADAT.
  • Software bundle – includes Focusrite Control, Scarlett MixControl, Ableton Live Lite, Pro Tools | First, and a suite of native plugins (EQ Eight, Compressor, Gate, Saturator, Utility).
  • Cross‑platform compatibility – works seamlessly on macOS (10.13+), Windows (7/8/10/11), with dedicated drivers for each OS.

Detailed Input and Output Configuration

The 18i20’s routing matrix is engineered to accommodate a wide range of recording scenarios:

Inputs
8 Mic Preamp Channels 48 V phantom power available on all mic inputs; each channel offers up to +24 dB gain.
2 Instrument Inputs Direct instrument level with switchable high‑impedance (Hi‑Z) for guitars and basses.
8 Line/ADAT Channels
Line Inputs Balanced TRS connectors for keyboards, drum machines, or other line sources.
ADAT Optical Input Receive up to 8 additional line inputs from an external ADAT device.
Outputs
16 Line Outputs (TRS) Balanced outputs for studio monitors, mixers, or external gear.
4 Monitor Outputs Dedicated monitor mix with independent level controls.
ADAT Optical Output
Send up to 8 line outputs to an external ADAT device.
Headphone Jack (3.5 mm) 48 Hz/24‑bit headphone output with independent volume control.

Audio Quality and Performance

The 4th Generation Scarlett series builds on Focusrite’s legacy of delivering clean, transparent sound. The 18i20 incorporates:

  • High‑dynamic range converters – 120 dB dynamic range ensures minimal distortion even at high signal levels.
  • Low noise floor0.1 µV typical, allowing quiet sources to be captured without hiss.
  • Balanced circuitry – reduces hum and interference across long cable runs.
  • USB‑C interface – provides a robust data link with power delivery, simplifying connectivity on modern laptops.

Software Suite Overview

The bundled software enhances workflow and creative possibilities:

  • Focusrite Control – a powerful mixer‑style interface for routing, level monitoring, and applying Focusrite Air or other presets.
  • Scarlett MixControl – offers quick mix adjustments directly on the device, ideal for live performance or podcasting.
  • Ableton Live Lite – a full DAW with unlimited tracks, built‑in instruments, and effects.
  • Pro Tools | First – a lightweight version of Pro Tools tailored for beginners and intermediate users.
  • Native Plugins – EQ Eight, Compressor, Gate, Saturator, Utility, and more provide high‑quality processing without latency.

Ideal Use Cases

The versatility of the 18i20 makes it suitable for a wide array of audio production environments:

  1. Studio Recording – Capture full‑band sessions with multiple microphones, instruments, and line sources simultaneously.
  2. Podcasting & Live Streaming – Use the monitor outputs to feed headphones for hosts while routing clean audio to streaming software.
  3. Home Studio Production – Combine MIDI keyboards, drum machines, and vocal tracks in a single session with minimal latency.
  4. Live Performance Monitoring – Route stage feeds to on‑stage monitors or a mixing console via the ADAT outputs.
  5. Multimedia Production – Integrate with video editing workflows, providing high‑quality audio tracks for film and animation projects.

Connectivity and Setup

Setting up the Scarlett 18i20 is straightforward:

  1. Connect via USB‑C to your computer’s power port; no additional drivers are required on macOS, while Windows users may need to install the Focusrite driver package.
  2. Power the device using the supplied USB‑C cable; the interface draws power directly from the host.
  3. Install the bundled software – launch Focusrite Control to configure routing, apply Air mode, and set sample rates.
  4. Configure your DAW – select “Scarlett 18i20” as the audio input/output device; enable 24‑bit/192 kHz if desired.
  5. Route signals – use Focusrite Control or Scarlett MixControl to assign inputs to outputs, create monitor mixes, and set up ADAT connections.

Maintenance and Care Tips

  • Keep the device in a dry environment; avoid exposure to extreme temperatures.
  • Use high‑quality cables for all balanced connections to preserve signal integrity.
  • Regularly update firmware via Focusrite Control to benefit from performance improvements and bug fixes.
  • When not in use, disconnect the USB cable and store the interface in its protective case if available.

Conclusion

The Focusrite Scarlett 18i20 4th Generation USB Audio Interface stands out as a comprehensive solution for musicians, producers, podcasters, and broadcasters who demand studio‑grade audio in a portable format. Its expansive I/O matrix, pristine converters, low latency operation, and robust software suite combine to deliver an all‑in‑one platform capable of handling the most demanding recording projects.


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Identifiers
Brand Focusrite
MPN Focusrite AMS-SCARLETT-18I20-4G
ID 53682588
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