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Audient Audio Interface iD4 MKII, Class A Console vs Kellards Focusrite Scarlett Solo USB-C Audio Interface

Updated August 2026 — Audient Audio Interface iD4 MKII, Class A Console wins on build and sound, Kellards Focusrite Scarlett Solo USB-C Audio Interface wins on accessories and price.

The Audient iD4 MKII offers superior audio quality and build, while the Focusrite Scarlett Solo provides excellent value and convenience for beginners.

Why Audient Audio Interface iD4 MKII, Class A Console is better

Audio Quality

Class A preamp for superior sound fidelity

Build Quality

All-metal construction for durability

Professional Features

Designed for serious recording applications

Why Kellards Focusrite Scarlett Solo USB-C Audio Interface is better

Price

More budget-friendly at $179.99

Included Accessories

Comes with headphones and pop filter

Ease of Use

User-friendly setup for beginners

Overall score

Audient Audio Interface iD4 MKII, Class A Console
88
Kellards Focusrite Scarlett Solo USB-C Audio Interface
76

Specifications

SpecAudient Audio Interface iD4 MKII, Class A ConsoleKellards Focusrite Scarlett Solo USB-C Audio Interface
Preamp TypeClass AStandard
Dynamic RangeNot specified120 dB
USB TypeUSB-CUSB-C
Weight740 gNot specified
CompatibilityMac/PC/iOSMac/PC/iOS

Dimension comparison

Audient Audio Interface iD4 MKII, Class A ConsoleKellards Focusrite Scarlett Solo USB-C Audio Interface

Overview of the Audient Audio Interface iD4 MKII and Focusrite Scarlett Solo

The Audient Audio Interface iD4 MKII is priced at $214.90, while the Focusrite Scarlett Solo is more budget-friendly at $179.99, making it about 17% cheaper. Both devices cater to musicians, podcasters, and content creators, but they offer distinct features that might influence your choice. The Audient iD4 MKII is known for its Class A console microphone preamp, while the Scarlett Solo promotes ease of use and portability, making them appealing to different types of users.

Build Quality and Design

The Audient iD4 MKII boasts an all-metal desktop housing that enhances its durability and stability, making it suitable for on-the-go recording. This robust design ensures that the device can withstand the rigors of travel without compromising performance. In contrast, the Focusrite Scarlett Solo is also designed with portability in mind, though its specific materials are not highlighted. Both interfaces are compact and user-friendly, but the Audient's metal construction may provide a slight edge in longevity.

Audio Quality

When it comes to audio quality, the Audient iD4 MKII features a Class A microphone preamp that is derived from Audient's high-end consoles, promising exceptional sound fidelity. This makes it an excellent choice for serious recording applications. On the other hand, the Focusrite Scarlett Solo offers a dynamic range of 120 dB, comparable to professional studio interfaces. It also features an Air mode that enhances vocal and guitar clarity, providing a rich and vibrant sound. While both devices deliver high-quality audio, the iD4 MKII may appeal more to those prioritizing professional studio sound.

Connectivity Options

The Audient iD4 MKII utilizes a high-speed USB-C connector, improving ease of handling and power supply. This modern connectivity option is becoming the standard for many audio interfaces. The Focusrite Scarlett Solo also adopts USB-C, which allows for a solid connection but does not emphasize any advanced features in this area. Both devices are compatible with Mac, PC, and iOS, ensuring versatility for various users. However, the iD4 MKII's enhanced USB-C capabilities may provide a slight advantage for those who prioritize cutting-edge technology.

Included Accessories

The Focusrite Scarlett Solo comes bundled with Polsen HPC-A30 studio monitor headphones, a pop filter, and an XLR-XLR cable, making it a comprehensive package for new users. This inclusion adds value, especially for those just starting in recording and production. In contrast, the Audient iD4 MKII focuses solely on the interface itself, without any additional accessories. For users looking for a complete recording setup right out of the box, the Scarlett Solo may be the more practical choice.

Ease of Use

Both the Audient iD4 MKII and the Focusrite Scarlett Solo are designed to be user-friendly, but they cater to slightly different needs. The Scarlett Solo is touted as being particularly easy to set up and get started, thanks to its Easy Start tool, which helps users quickly navigate the recording process. The iD4 MKII is also straightforward but is aimed at a more experienced audience who may appreciate its advanced features. Therefore, beginners might find the Scarlett Solo more accessible, while the iD4 MKII may resonate better with seasoned creators.

Target Audience

The Audient iD4 MKII is ideal for users who prioritize high-end audio quality and professional features, making it a great choice for home studios and serious recording environments. With its Class A preamp and superior sound fidelity, it targets musicians looking for the best in sound. Conversely, the Focusrite Scarlett Solo is designed for those who need a simple, effective solution for recording music or podcasts, making it particularly appealing to singer-songwriters and content creators who value convenience and portability.

Price Comparison

At $214.90, the Audient iD4 MKII is positioned at a higher price point compared to the Focusrite Scarlett Solo, which retails for $179.99. This represents a difference of $34.91, making the Solo about 17% more affordable. While both devices offer excellent features, the price difference may sway budget-conscious buyers toward the Scarlett Solo, especially given the additional accessories included in its bundle.

Which should you buy?

Choosing between the Audient Audio Interface iD4 MKII and the Focusrite Scarlett Solo ultimately depends on your recording needs and budget. If you value top-notch audio quality and durability, the iD4 MKII is an excellent investment. However, if you are looking for a more budget-friendly option that includes essential accessories and ease of use, the Scarlett Solo is hard to beat. Consider your priorities, whether they lean toward professional sound quality or a complete, user-friendly recording package, to make the best choice for your audio needs.