Focusrite Scarlett 18i20 4th Gen USB Audio Interface vs Solid State Logic SSL 2 Plus MKII USB Audio
Updated August 2026 — Focusrite Scarlett 18i20 4th Gen USB Audio Interface wins on inputs and outputs, Solid State Logic SSL 2 Plus MKII USB Audio wins on value.
The Focusrite Scarlett 18i20 is a more powerful and feature-rich audio interface, making it ideal for professional use, while the SSL 2 Plus MKII offers solid performance at a more accessible price.
Why Focusrite Scarlett 18i20 4th Gen USB Audio Interface is better
Input/Output
Scarlett has 18 inputs and 20 outputs compared to SSL's 2 inputs and 4 outputs.
Dynamic Range
Scarlett offers a dynamic range of 122dB, superior to SSL's.
Advanced Features
Scarlett includes Auto Gain and Clip Safe for better workflow.
Why Solid State Logic SSL 2 Plus MKII USB Audio is better
Price
SSL is significantly cheaper at $299.99.
Portability
SSL has a more compact design for easy transport.
User-Friendly
SSL is designed for beginners and home studios.
Overall score
Specifications
| Spec | Focusrite Scarlett 18i20 4th Gen USB Audio Interface | Solid State Logic SSL 2 Plus MKII USB Audio |
|---|---|---|
| Mic Preamps | 8 | 2 |
| Max Sample Rate | 192 kHz | 192 kHz |
| Dynamic Range | 122 dB | not specified |
| Software Bundle | Pro Tools, Ableton | SSL Production Pack |
| Monitoring | Auto Gain, Clip Safe | Zero-Latency |
Dimension comparison
Overview of the Focusrite Scarlett 18i20 and Solid State Logic SSL 2 Plus MKII
The Focusrite Scarlett 18i20 and the Solid State Logic SSL 2 Plus MKII are two powerful USB audio interfaces catering to musicians, producers, and podcasters. The Scarlett 18i20 is priced at $749.99, while the SSL 2 Plus MKII is about 60% cheaper at $299.99. This price difference reflects their target user bases and features, making each suitable for different needs in audio recording and production.
Input and Output Capabilities
The Focusrite Scarlett 18i20 boasts an impressive 18 inputs and 20 outputs, making it ideal for complex recording setups. It features eight mic preamps, Hi-Z, line inputs, and more, allowing versatile connectivity for a wide range of instruments and microphones. In comparison, the SSL 2 Plus MKII offers 2 XLR mic preamps and 4 1/4" balanced outputs. While it's sufficient for simpler setups, it may fall short for larger sessions that the Scarlett can handle seamlessly.
Audio Quality and Performance
Audio quality is a standout feature for both interfaces. The Scarlett 18i20 utilizes 24-bit, 192kHz converters, providing a dynamic range of 122dB, which ensures detailed recordings. The SSL 2 Plus MKII also supports 32-bit, 192kHz AD/DA conversion, ensuring high-quality audio but may not reach the same dynamic range as the Scarlett. For users prioritizing top-tier audio fidelity, the Scarlett 18i20 offers an edge due to its superior dynamic range and professional-grade components.
Monitoring and Workflow Features
When it comes to monitoring and workflow, the Focusrite Scarlett 18i20 is equipped with features like Auto Gain and Clip Safe, which help manage levels efficiently during recording. This allows users to concentrate on their performance without the constant worry of clipping. The SSL 2 Plus MKII offers zero-latency monitoring and high-pass filters but lacks some of the advanced features found in the Scarlett. For professional studios, the Scarlett's features provide a more robust solution for managing complex tracking sessions.
Software Bundles
Both the Scarlett 18i20 and SSL 2 Plus MKII come with software bundles that enhance their usability. The Scarlett includes Pro Tools Intro+, Ableton Live Lite, and Cubase LE, along with a suite of effects and instruments, making it a comprehensive package for music production. The SSL 2 Plus MKII, on the other hand, comes with the SSL Production Pack software bundle. While both offer valuable tools, the Scarlett's extensive suite may appeal more to users looking for a complete production environment right out of the box.
Design and Build Quality
In terms of design, both interfaces offer professional aesthetics and solid build quality. The Focusrite Scarlett 18i20 is designed for extensive studio use, with a robust chassis to withstand the rigors of daily use. The SSL 2 Plus MKII also features a sleek and compact design that is easy to transport, making it ideal for musicians on the go. However, for users prioritizing durability and extensive I/O options, the Scarlett may be the more suitable choice.
Target Audience
The Focusrite Scarlett 18i20 is aimed at larger studios and professional users who require extensive input and output options for multitrack recording. Its price reflects its capabilities, making it ideal for serious music production and podcasting. On the other hand, the SSL 2 Plus MKII is more suited for home studios, podcasters, and musicians who need a reliable interface without the bells and whistles of higher-end models. Its lower price makes it an attractive option for those starting or working within a budget.
Which should you buy?
Choosing between the Focusrite Scarlett 18i20 and the Solid State Logic SSL 2 Plus MKII ultimately depends on your specific needs and budget. The Scarlett 18i20, priced at $749.99, is a powerful, feature-rich interface suitable for professional use, while the SSL 2 Plus MKII offers solid performance at a more accessible price of $299.99, making it great for beginners and home studios. If you require extensive I/O options and advanced features, the Scarlett is the clear winner. However, for those who need a reliable and affordable interface for simpler projects, the SSL 2 Plus MKII is an excellent choice.

