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Focusrite Scarlett 18i20 4th Gen USB Audio Interface vs PreSonus Quantum ES 2 USB-C Audio Interface with

Updated August 2026 — Focusrite Scarlett 18i20 4th Gen USB Audio Interface wins on connectivity and audio quality, PreSonus Quantum ES 2 USB-C Audio Interface with wins on latency and software.

The Focusrite Scarlett 18i20 offers superior features and audio quality, making it ideal for professionals, while the PreSonus Quantum ES 2 is a budget-friendly option for beginners.

Why Focusrite Scarlett 18i20 4th Gen USB Audio Interface is better

Audio Quality

Scarlett has 24-bit, 192kHz converters with a dynamic range of 122dB.

Inputs/Outputs

Scarlett features 18 inputs and 20 outputs, ideal for complex setups.

Software Package

Scarlett includes a broader suite of software for music production.

Why PreSonus Quantum ES 2 USB-C Audio Interface with is better

Price

Quantum ES 2 is significantly cheaper at $262.99.

Simplicity

Quantum ES 2 is designed for straightforward use, ideal for beginners.

Portability

Quantum ES 2 is more compact and easier to transport.

Overall score

Focusrite Scarlett 18i20 4th Gen USB Audio Interface
85
PreSonus Quantum ES 2 USB-C Audio Interface with
70

Specifications

SpecFocusrite Scarlett 18i20 4th Gen USB Audio InterfacePreSonus Quantum ES 2 USB-C Audio Interface with
Preamps82
Converters24-bit, 192kHzHigh-performance
Dynamic Range122dB75dB
Auto GainYesYes
Included SoftwarePro Tools, Ableton, CubaseStudio One Pro

Dimension comparison

Focusrite Scarlett 18i20 4th Gen USB Audio InterfacePreSonus Quantum ES 2 USB-C Audio Interface with

Price Comparison

The Focusrite Scarlett 18i20 is priced at $749.99, while the PreSonus Quantum ES 2 is significantly more affordable at $262.99, making it about 65% cheaper. This price discrepancy could be a decisive factor for budget-conscious musicians and podcasters. The Scarlett 18i20, with its higher price tag, reflects its extensive capabilities and features designed for professional studio environments. In contrast, the Quantum ES 2 offers essential features at a fraction of the cost, appealing to beginners or those who require a more straightforward setup without compromising on quality.

Features Overview

The Focusrite Scarlett 18i20 boasts 18 inputs and 20 outputs, including eight mic preamps, while the PreSonus Quantum ES 2 features two high-definition MAX-HD mic preamps. This difference highlights the Scarlett's capacity for larger recording sessions, making it ideal for bands or complex setups. On the other hand, the Quantum ES 2 is designed for simplicity and efficiency for solo artists or small projects. With the Scarlett’s extensive connectivity options and the Quantum’s streamlined features, each interface caters to different user needs, whether for intricate multitrack recording or straightforward audio tasks.

Audio Quality

When it comes to audio quality, the Focusrite Scarlett 18i20 is equipped with 24-bit, 192kHz converters that offer a dynamic range of 122dB. This level of detail is particularly beneficial for professional recording environments where high fidelity is crucial. In contrast, the PreSonus Quantum ES 2 features high-performance converters and newly designed mic preamps with +75 dB of gain, ensuring clear and transparent audio. While both interfaces provide excellent sound quality, the Scarlett’s superior specifications may appeal more to those engaged in more intricate music production or high-stakes podcasting.

Ease of Use

The Focusrite Scarlett 18i20 includes professional workflow tools such as Auto Gain and Clip Safe, which help mitigate common recording challenges. This user-friendly approach is essential for newcomers or those who might struggle with manual adjustments. Meanwhile, the PreSonus Quantum ES 2 also features an Auto Gain function and a Universal Control app that allows users to manage preamp functions conveniently from their devices. This similarity in user-friendly features suggests that both products are designed to minimize the learning curve, but the Scarlett offers additional tools that may streamline the recording process even further.

Software Integration

In terms of software, the Focusrite Scarlett 18i20 comes with a comprehensive suite that includes Pro Tools Intro+, Ableton Live Lite, Cubase LE, and Hitmaker Expansion. This extensive software package is perfect for individuals looking to dive deeply into music production. Conversely, the PreSonus Quantum ES 2 includes a perpetual license for Studio One Pro, a robust DAW that caters well to recording and mixing needs. While both products offer powerful software solutions, the Scarlett’s package is broader, potentially providing more versatility to users who want access to multiple platforms.

Target Audience

The Focusrite Scarlett 18i20 is ideal for professional musicians, producers, and podcasters who require extensive input options and high-quality audio. Its higher price point and advanced features cater to those who are serious about their audio production. On the other hand, the PreSonus Quantum ES 2 is better suited for entry-level users or those who need a reliable interface without unnecessary complexity. Its lower cost and straightforward operation make it attractive for hobbyists or self-recording artists who prioritize ease of use and budget.

Connectivity Options

The Scarlett 18i20 offers a wealth of connectivity options, including eight mic preamps, Hi-Z, line inputs, ADAT, S/PDIF, MIDI I/O, and Word Clock. This variety allows for a multitude of devices to be connected simultaneously, making it a perfect choice for complex setups. In contrast, the PreSonus Quantum ES 2 focuses on essential connectivity with two balanced ¼-inch TRS main outputs and a high-power headphone output. While it may lack the extensive input options of the Scarlett, it caters well to users who need straightforward, effective connectivity without overwhelming choices.

Which should you buy?

Choosing between the Focusrite Scarlett 18i20 and the PreSonus Quantum ES 2 ultimately depends on your specific needs and budget. If you require a professional-grade interface with extensive connectivity and superior audio quality for complex projects, the Scarlett 18i20 is the better choice despite its higher price of $749.99. However, if you are a beginner or a solo artist looking for a reliable, user-friendly interface at an accessible price of $262.99, the Quantum ES 2 is an excellent option that provides essential features without compromising on sound quality. Consider your recording requirements and budget to make the best decision for your audio production needs.