The Focusrite Scarlett 18i20 is a high-performance 4th Gen USB-C audio interface‚ offering 18 inputs and 20 outputs. Ideal for professionals and beginners‚ it delivers exceptional audio quality‚ versatile connectivity‚ and seamless DAW integration‚ making it a cornerstone for home and professional studios. This guide covers its features‚ setup‚ and troubleshooting for optimal music production and recording.

Overview of the Scarlett 18i20
The Scarlett 18i20 is a 4th Gen USB-C audio interface designed for professional and home recording. It features 18 inputs and 20 outputs‚ offering flexibility for multi-microphone setups and external gear integration. With high-quality preamps and up to 24-bit/192kHz resolution‚ it ensures pristine audio capture. The interface supports ADAT‚ SPDIF‚ MIDI‚ and TRS connections‚ catering to diverse recording needs. Its robust build and compact design make it ideal for studio and mobile use. Weighing 3.4 kg and measuring 45 x 482 x 265 mm‚ it balances portability with durability. The Scarlett 18i20 is complemented by Focusrite Control software‚ enabling precise routing and monitoring. This manual is essential for unlocking its full potential‚ whether you’re a novice or an experienced producer.
History and Evolution of the Scarlett Series
The Scarlett series‚ introduced by Focusrite‚ has become a benchmark in audio interfaces. Launched in 2011‚ it revolutionized home recording with its affordability and quality. The 1st Gen set the standard with 24-bit/96kHz resolution and iconic red preamps. The 2nd Gen improved headroom and dynamic range‚ while the 3rd Gen added USB-C and loopback functionality. The 4th Gen‚ released in 2021‚ introduced USB-C‚ improved preamps‚ and expanded software bundles. Each generation has enhanced performance‚ connectivity‚ and user experience‚ solidifying Scarlett’s reputation as a leader in audio interfaces. The Scarlett 18i20‚ part of this legacy‚ continues to evolve‚ offering cutting-edge features for modern producers and engineers.

Features of the Scarlett 18i20
The Scarlett 18i20 offers 18 inputs and 20 outputs‚ high-quality preamps‚ and versatile connectivity options‚ including XLR‚ TRS‚ MIDI‚ ADAT‚ and SPDIF. Built with durable materials‚ it ensures professional-grade audio performance and seamless integration with DAWs‚ supported by Focusrite Control software for advanced routing and monitoring.
Number of Inputs and Outputs
The Scarlett 18i20 features 18 inputs and 20 outputs‚ providing extensive connectivity for professional recording needs. The inputs include 8 XLR/TRS combo jacks on the rear panel‚ with 2 additional XLR/TRS inputs on the front for quick access. These inputs support microphones‚ instruments‚ and line-level signals. The 20 outputs include 2 TRS monitor outputs‚ 2 RCA unbalanced outputs‚ and 16 digital outputs via ADAT and SPDIF. This flexibility allows for multi-microphone setups‚ external gear integration‚ and precise monitoring configurations. The interface also supports MIDI I/O for seamless integration with controllers and synthesizers‚ making it ideal for complex studio environments and live sound applications.
Types of Connections (XLR‚ TRS‚ MIDI‚ ADAT‚ SPDIF)
The Scarlett 18i20 offers a variety of connection types to cater to diverse recording needs. XLR inputs are ideal for microphones‚ while TRS jacks accommodate line-level signals and instruments. MIDI I/O enables communication with controllers and synthesizers. Digital connectivity is provided through ADAT and SPDIF ports‚ allowing integration with external preamps and digital gear. These connections ensure high-quality audio transmission‚ with balanced options like XLR and TRS minimizing interference. The interface supports up to 16 channels of digital I/O via ADAT and 2 channels via SPDIF‚ making it versatile for both analog and digital setups. This comprehensive range of connections ensures compatibility with a wide array of studio equipment.
Preamps and Audio Quality
The Scarlett 18i20 is renowned for its high-quality preamps‚ delivering clean‚ low-noise amplification with up to 50dB of gain. These preamps are designed to capture the full dynamic range of your audio sources‚ ensuring clarity and precision. The interface supports 24-bit/192kHz conversion‚ providing exceptional audio resolution. The third-generation preamps offer improved headroom and a more transparent sound compared to earlier models. Additionally‚ the Air mode enhances high frequencies‚ adding a bright‚ open quality reminiscent of Focusrite’s classic ISA preamps. This combination of high-quality preamps and advanced conversion ensures professional-grade audio performance‚ making the Scarlett 18i20 a reliable choice for studio recordings.
Build Quality and Design
The Scarlett 18i20 boasts a robust metal chassis‚ ensuring durability and longevity. Its compact‚ lightweight design makes it portable while maintaining a professional aesthetic. The interface features a sleek front panel with LED indicators for input levels‚ offering clear visual feedback. The rear panel is well-organized‚ providing easy access to all inputs and outputs. The unit’s solid construction ensures minimal noise and interference‚ while its ergonomic layout enhances user experience. Designed for both studio and mobile use‚ the Scarlett 18i20 balances functionality and portability‚ making it a reliable choice for musicians and producers seeking high-quality audio performance in various environments.
Comparison with Other Scarlett Models
The Scarlett 18i20 stands out among its siblings with its extensive I/O capabilities‚ offering 18 inputs and 20 outputs. Unlike the Scarlett 2i2‚ which is more compact with 2 inputs‚ the 18i20 caters to larger recording setups. It also surpasses the Scarlett 4i4 in terms of connectivity options‚ making it ideal for multi-track recordings. While the Scarlett 8i6 offers similar flexibility‚ the 18i20 provides additional digital inputs via ADAT and SPDIF‚ enhancing its versatility for professional applications. This makes the 18i20 a top choice for producers and engineers needing a comprehensive audio interface for complex projects and high-channel counts.

Setup and Installation
Unboxing and connecting the Scarlett 18i20 is straightforward. Ensure your system meets compatibility requirements‚ install the latest drivers‚ and connect peripherals for optimal performance and functionality.
Unboxing and Initial Setup
Unboxing the Scarlett 18i20 reveals a sleek‚ professional-grade audio interface. Inside‚ you’ll find the device‚ a USB-C cable‚ power supply‚ and a quick-start guide. Initial setup involves connecting the interface to your computer‚ ensuring the latest Focusrite Control software is installed. Connect your audio devices to the appropriate inputs‚ following the manual’s guidance for analog and digital connections. Front-panel inputs 1-2 take priority over rear inputs‚ so plan your setup accordingly. Power on the device and verify connectivity in your DAW. Refer to the manual for detailed steps to ensure a smooth and optimal setup experience.
System Requirements and Compatibility
The Scarlett 18i20 is compatible with both macOS and Windows operating systems‚ requiring macOS 10.14 or later and Windows 10 or higher. It connects via USB-C‚ ensuring fast and reliable data transfer. For optimal performance‚ a USB 3.0 or higher port is recommended. The interface is compatible with all major DAWs‚ including Ableton Live‚ Logic Pro‚ and Pro Tools. Focusrite Control software is essential for configuring settings and ensuring compatibility. Regular software updates are available to maintain performance and compatibility with the latest operating systems. Always check the Focusrite website for the most up-to-date system requirements and driver installations to ensure seamless operation.
Installing Drivers and Software

Installing the Scarlett 18i20 drivers and software is straightforward. Download the latest Focusrite Control software from the official Focusrite website. Ensure your system meets the compatibility requirements before proceeding. For macOS‚ run the .dmg file‚ while Windows users should execute the .exe file. Follow the on-screen instructions to complete the installation. After installation‚ restart your computer to ensure proper driver integration. The Focusrite Control software allows you to configure settings‚ route audio‚ and manage digital inputs/outputs. Additionally‚ install the Scarlett Plug-ins Suite and Focusrite Pro Plug-in Suite for enhanced audio processing. Regular software updates are essential for optimal performance and compatibility with your operating system.
Connecting Peripherals and Devices
Connecting peripherals and devices to the Scarlett 18i20 is seamless. Use the XLR inputs for microphones and TRS for line-level instruments or equipment. MIDI I/O allows synchronization with controllers or external gear. ADAT and SPDIF ports enable digital connections for expanders or other audio interfaces. For monitoring‚ connect headphones to the dedicated outputs. Ensure all cables are securely plugged in to avoid signal loss. Balanced connections (TRS or XLR) are recommended to minimize interference. Refer to the manual for specific input/output configurations. Properly label and organize cables for a clutter-free setup. Always power on devices in the correct order to prevent damage or noise. This ensures optimal performance and a professional recording experience.
Inputs and Input Configuration
The Scarlett 18i20 offers 18 inputs‚ including XLR‚ TRS‚ and MIDI‚ providing flexibility for microphones‚ instruments‚ and external devices. Configuration options allow customization for various recording needs.
Analog Inputs (XLR and TRS)
The Scarlett 18i20 features 8 XLR and 2 TRS analog inputs on the rear‚ with 2 additional XLR/TRS combo inputs on the front. These inputs provide flexibility for connecting microphones‚ instruments‚ and line-level sources. The front inputs are high-headroom‚ accommodating both mic and instrument levels‚ while the rear inputs are ideal for studio setups. Each input is equipped with Focusrite’s renowned preamps‚ delivering clear‚ low-noise audio. The combo inputs allow easy switching between XLR and TRS connections‚ ensuring compatibility with a wide range of equipment. This versatility makes the Scarlett 18i20 suitable for recording vocals‚ guitars‚ and other instruments with professional-grade quality.
Digital Inputs (ADAT and SPDIF)
The Scarlett 18i20 includes digital inputs via ADAT and SPDIF connections‚ expanding its versatility for professional recording setups. The ADAT input supports up to 8 channels of digital audio‚ ideal for connecting external preamps or devices like digital mixers. The SPDIF input accommodates 2 channels‚ perfect for integrating CD players‚ tape decks‚ or other digital sources. These inputs allow seamless integration of external gear‚ enhancing the interface’s flexibility. The ADAT and SPDIF inputs are routed directly into the DAW‚ ensuring high-quality digital signal capture. This feature is particularly useful for studios needing to connect multiple digital devices‚ making the Scarlett 18i20 a comprehensive solution for complex recording environments.
MIDI Inputs and Sync
The Scarlett 18i20 features MIDI input and output ports‚ enabling seamless synchronization with external MIDI devices such as synthesizers‚ drum machines‚ and controllers. Located on the rear panel‚ these ports allow for precise timing and control‚ ensuring your studio setup runs in perfect sync. The MIDI input captures data from external devices‚ while the output sends MIDI signals to control other gear. This functionality is essential for producing and recording music‚ as it maintains consistent timing across all connected equipment. The Scarlett 18i20’s MIDI capabilities integrate effortlessly with DAWs‚ making it a reliable choice for both live performances and studio recordings. This ensures a professional-grade MIDI workflow tailored to your creative needs.

Outputs and Output Configuration
The Scarlett 18i20 offers 20 outputs‚ including analog TRS‚ RCA‚ and digital ADAT/SPDIF connections. These outputs provide flexible routing options for monitors‚ external gear‚ and mixing setups‚ ensuring high-quality audio distribution with minimal interference;
Analog Outputs (TRS and RCA)
The Scarlett 18i20 features balanced TRS outputs for professional-grade audio and RCA connectors for unbalanced signals. TRS ensures minimal interference and crosstalk‚ ideal for studio monitors and high-end equipment. RCA outputs are suitable for consumer-grade devices‚ providing flexibility for various setups. Both output types deliver clear‚ high-quality audio‚ meeting the needs of diverse recording environments. Proper configuration through Focusrite Control software allows precise routing and mixing‚ ensuring optimal performance. Refer to the manual for detailed setup instructions to maximize your analog output capabilities and achieve professional sound quality in your recordings and mixes.
Digital Outputs (ADAT and SPDIF)
The Scarlett 18i20 offers versatile digital outputs‚ including ADAT and SPDIF‚ for high-quality audio transmission. The ADAT optical ports support up to 8 channels of digital audio‚ ideal for expanding your setup with external preamps or processors. SPDIF RCA connectors handle stereo digital signals‚ perfect for connecting to mixers‚ processors‚ or other digital devices. These outputs are configurable via Focusrite Control software‚ allowing precise routing and synchronization. ADAT enables multi-track recording and playback‚ while SPDIF ensures compatibility with a wide range of digital gear. Both formats deliver pristine audio quality‚ making them essential for professional and flexible recording environments. Proper setup ensures seamless integration into your workflow.
Headphone Outputs and Monitoring
The Scarlett 18i20 features dual headphone outputs with independent level controls‚ enabling multiple listeners to monitor audio simultaneously. These outputs provide high-quality‚ clear sound‚ essential for accurate monitoring during recording sessions. The interface supports zero-latency monitoring‚ allowing artists to hear their performances in real-time without delay. This feature is crucial for professional recording environments‚ ensuring precise playback and minimizing distractions. The headphone outputs are powered by high-quality amplifiers‚ delivering consistent volume and clarity. Additionally‚ the Focusrite Control software allows customization of monitoring settings‚ including mix levels and routing. This flexibility makes the Scarlett 18i20 ideal for both solo artists and collaborative projects‚ ensuring seamless monitoring for all users.

Software and Control
The Scarlett 18i20 comes with Focusrite Control software‚ enabling precise routing‚ mixing‚ and monitoring. It integrates seamlessly with DAWs‚ offering low-latency performance and intuitive control over all inputs and outputs.
Focusrite Control Software Overview
Focusrite Control is a powerful software suite designed to manage and optimize the Scarlett 18i20’s functionality. It provides a user-friendly interface for configuring inputs‚ outputs‚ and routing‚ ensuring seamless integration with your DAW. The software allows for low-latency monitoring‚ custom mix setups‚ and precise control over preamps and other hardware features. With Focusrite Control‚ you can easily adjust settings such as gain levels‚ phantom power‚ and digital I/O modes. It also supports multi-device setups‚ enabling synchronization and control of multiple Scarlett interfaces. Regular updates ensure compatibility with the latest operating systems and DAWs‚ making it an essential tool for professional and home recording environments.
DAW Integration and Routing
The Scarlett 18i20 seamlessly integrates with popular DAWs like Ableton‚ Logic Pro‚ and Pro Tools‚ offering intuitive routing options. Focusrite Control software simplifies setup‚ allowing direct alignment of hardware outputs with DAW tracks; Low-latency monitoring ensures real-time playback without delay. Custom routing enables flexible signal flow‚ while pre-configured templates streamline the recording process. The interface supports multi-track recording and playback‚ with clear channel assignments for inputs and outputs. Its ADAT and SPDIF digital connections expand routing possibilities‚ making it ideal for complex studio setups. Whether recording live instruments or mixing‚ the Scarlett 18i20’s DAW integration ensures a smooth‚ professional workflow tailored to your creative needs.
Scarlett Plug-ins and Effects
The Scarlett 18i20 comes with a suite of professional plug-ins and effects‚ enhancing your recording and mixing experience. The included software bundle features the iconic Air and 1176 compressors‚ delivering studio-grade dynamics control. Additionally‚ the Scarlett EQ and reverb tools provide precise tone shaping and spatial depth. These plug-ins are compatible with all major DAWs‚ allowing seamless integration into your workflow. The interface’s preamps are complemented by virtual recreations of Focusrite’s classic Red Series‚ offering warm‚ detailed sound. With low-latency processing‚ you can monitor and adjust effects in real time. These tools empower you to achieve professional-sounding mixes‚ making the Scarlett 18i20 a comprehensive solution for musicians and producers.

Troubleshooting Common Issues
Common issues with the Scarlett 18i20 include connectivity problems‚ sync errors‚ and audio glitches. Check cable connections‚ update drivers‚ and consult the manual for detailed solutions.
Common Problems and Solutions
Users often encounter connectivity issues‚ such as sync errors or audio dropouts. Ensure all cables are securely connected and drivers are updated. For sync problems‚ check the digital I/O mode in Focusrite Control. If experiencing audio glitches‚ restart the interface and DAW. Additionally‚ verify that the Scarlett 18i20 is selected as the default audio device in system settings. Refer to the manual for detailed troubleshooting steps. Regularly updating firmware and software can prevent many issues. If problems persist‚ contact Focusrite support for assistance. Proper setup and maintenance are key to optimal performance.
Connectivity and Sync Issues
Connectivity and sync issues with the Scarlett 18i20 often arise from improper digital I/O mode settings or loose cable connections. Ensure all cables are securely plugged in and verify the digital I/O mode in Focusrite Control matches your setup. For ADAT or SPDIF connections‚ check that the sync source is correctly configured. If experiencing sync errors‚ restart the interface and DAW‚ then re-enable sync. Additionally‚ ensure the Scarlett 18i20 is set as the default audio device in your system settings. If issues persist‚ update the firmware or consult the manual for detailed troubleshooting steps. Proper configuration and cable management are crucial for stable operation.
Maintenance and Care
Regularly clean the Scarlett 18i20 with a soft cloth and avoid harsh chemicals. Handle cables gently to prevent damage. Update firmware and software periodically for optimal performance. Refer to the manual for detailed care instructions to ensure longevity and reliability.
Cleaning and Upkeep
Regular cleaning and proper upkeep are essential to maintain the Scarlett 18i20’s performance and longevity. Use a soft‚ dry cloth to wipe down the exterior and controls‚ avoiding harsh chemicals or abrasive materials. For stubborn marks‚ lightly dampen the cloth with water‚ but ensure no moisture enters the device. Avoid exposing the interface to extreme temperatures or humidity. Dust buildup inside can be gently removed with compressed air‚ but avoid spraying liquids directly on the unit. Cables should be handled carefully to prevent damage‚ and connections should be inspected regularly for cleanliness. Refer to the manual for detailed care instructions to ensure optimal functionality and extend the lifespan of your Scarlett 18i20.
Software and Firmware Updates
Regular software and firmware updates are crucial for optimal performance of the Scarlett 18i20. Focusrite frequently releases updates to enhance functionality‚ fix issues‚ and add new features. To update‚ download the latest version of Focusrite Control software from the official website. Ensure your device is connected to your computer via USB and follow the on-screen instructions. Firmware updates are typically handled through the Focusrite Control interface‚ providing clear prompts for installation. Always back up your work before updating and avoid interrupting the process. Refer to the user manual or Focusrite’s support page for detailed guidance on updating your Scarlett 18i20 to the latest firmware and software versions.
The Scarlett 18i20 is renowned for its versatility‚ high-quality preamps‚ and user-friendly design‚ making it an excellent choice for both professional and home music production setups.

Final Thoughts on the Scarlett 18i20
The Scarlett 18i20 stands out as a versatile and high-quality audio interface‚ catering to both professional and home recording needs. Its 18 inputs and 20 outputs provide ample connectivity options‚ while the Focusrite Control software ensures intuitive routing and monitoring. The preamps deliver clear‚ professional-grade audio‚ and the robust build ensures durability. Whether for multi-mic setups or integrating digital gear via ADAT and SPDIF‚ the Scarlett 18i20 excels. Its compatibility with various DAWs and operating systems makes it a reliable choice for modern producers. With consistent updates and strong community support‚ it remains a top-tier option for musicians and engineers seeking flexibility and superior sound quality.

Resources and Support
The Scarlett 18i20 is backed by comprehensive resources‚ including the official Focusrite manual‚ downloadable software‚ and a dedicated support community for troubleshooting and optimization.
Official Manual and Documentation
The Focusrite Scarlett 18i20 manual is a comprehensive guide available for free download from Focusrite’s official support website. It provides detailed instructions for setup‚ features‚ and troubleshooting. The manual covers input/output configurations‚ digital I/O modes‚ and software integration. Key sections include input priority settings‚ with page 28 highlighting input layouts. Users can also find specifications‚ dimensions‚ and compatibility details. The manual is essential for both new and experienced users to maximize the interface’s potential. Regular updates ensure compatibility with the latest software and hardware. Referencing the manual is crucial for resolving connectivity issues and optimizing performance. It serves as a complete resource for understanding and utilizing the Scarlett 18i20 effectively.
Focusrite Support and Community
Focusrite offers extensive support resources for the Scarlett 18i20‚ ensuring users can resolve issues and maximize their experience. The official support website provides access to user manuals‚ troubleshooting guides‚ and FAQs. Additionally‚ the Focusrite community forum is a vibrant platform where users can ask questions‚ share tips‚ and interact with fellow musicians and producers. The company also provides 24/7 customer support for technical inquiries. Regular software and firmware updates are available to keep the interface performing optimally. With a strong emphasis on user engagement‚ Focusrite fosters a supportive ecosystem‚ helping both beginners and professionals achieve their creative goals effectively.
