Audient Audio Interface iD4 MKII, Class A Console vs Universal Audio Apollo Solo Heritage Edition, APLS-HE
Updated August 2026 — Audient Audio Interface iD4 MKII, Class A Console wins on price, Universal Audio Apollo Solo Heritage Edition, APLS-HE wins on features and weight.
The Audient iD4 MKII offers excellent value for budget-conscious users, while the Universal Audio Apollo Solo Heritage Edition provides advanced features for professionals.
Why Audient Audio Interface iD4 MKII, Class A Console is better
Price
The iD4 MKII is significantly cheaper.
Weight
The iD4 MKII is lighter, making it more portable.
User-Friendly
The iD4 MKII has simpler features for beginners.
Why Universal Audio Apollo Solo Heritage Edition, APLS-HE is better
Audio Quality
The Apollo Solo has superior audio conversion.
Plug-ins
The Apollo Solo includes a premium suite of plug-ins.
Monitoring
The Apollo Solo has a best-in-class headphone amplifier.
Overall score
Specifications
| Spec | Audient Audio Interface iD4 MKII, Class A Console | Universal Audio Apollo Solo Heritage Edition, APLS-HE |
|---|---|---|
| Price | $214.90 | $599.00 |
| Sales Rank | 4067 | 4750 |
| USB Type | USB-C | Thunderbolt 3 |
| Headphone Outputs | 2 | 1 |
| Plug-ins | None | 5 included |
Dimension comparison
Design and Build Quality
The Audient Audio Interface iD4 MKII has a robust design with an all-metal desktop housing, offering stability and durability, making it ideal for both home and mobile recording. In contrast, the Universal Audio Apollo Solo Heritage Edition features a premium build quality with uncompromising analog design, ensuring reliability during extensive use. While both interfaces are designed for portability, the Audient iD4 MKII is lighter at 740 grams, which may be advantageous for users needing to travel frequently.
Audio Quality
When it comes to audio quality, the Audient iD4 MKII is equipped with a Class A console microphone preamp derived from the high-end ASP8024 HE console, which elevates home recording to a professional level. On the other hand, the Universal Audio Apollo Solo Heritage Edition boasts class-leading UA audio conversion and includes two Unison mic preamps. This gives it a significant edge for users who prioritize high-fidelity audio and real-time processing capabilities, especially in professional settings.
Connectivity
Connectivity options differ significantly between the two products. The Audient iD4 MKII uses a high-speed USB-C connection, making it compatible with Mac, PC, and iOS devices. In contrast, the Universal Audio Apollo Solo Heritage Edition connects via Thunderbolt 3, which provides a faster data transfer rate and efficient performance. This difference can be crucial for users who require low-latency monitoring and are working with demanding audio applications.
Software and Plug-ins
The Universal Audio Apollo Solo Heritage Edition includes a premium suite of five award-winning plug-in titles valued at $1,300, enhancing its functionality right out of the box. This makes it particularly appealing for users who want to start mixing and mastering immediately. In comparison, the Audient iD4 MKII does not come bundled with additional software or plug-ins, which may be a drawback for those looking for an all-in-one solution to kickstart their audio production.
Monitoring Features
The Audient iD4 MKII offers a monitor mix and monitor panning function, allowing users to create a personalized monitoring experience. It also features two headphone outputs, making it convenient for collaborative sessions. Conversely, the Apollo Solo Heritage Edition is known for its best-in-class headphone amplifier, providing loud, detailed, and low-noise monitoring. While both interfaces prioritize monitoring, the Apollo Solo's superior headphone capabilities may appeal more to professional users.
Pricing Comparison
The pricing of the two interfaces reveals a significant difference. The Audient iD4 MKII is priced at $214.90, while the Universal Audio Apollo Solo Heritage Edition retails for $599.00, making the latter about 177% more expensive. For budget-conscious consumers, the Audient iD4 MKII presents an attractive option without sacrificing essential features, while the Apollo offers high-end capabilities that justify its premium price tag.
Sales Rank and Popularity
In terms of popularity, the Audient iD4 MKII has a sales rank of 4067, indicating a healthy demand in the market. The Universal Audio Apollo Solo Heritage Edition, with a sales rank of 4750, is also well-regarded but slightly less popular. This difference in sales rank may suggest that the Audient iD4 MKII is favored by a broader range of users, particularly those who are looking for effective, budget-friendly solutions.
Which should you buy?
Choosing between the Audient iD4 MKII and the Universal Audio Apollo Solo Heritage Edition largely depends on your specific needs and budget. If you're seeking a high-quality, portable audio interface that is budget-friendly, the Audient iD4 MKII is an excellent choice. However, for users who require advanced audio processing capabilities, premium plug-ins, and superior monitoring options, the Universal Audio Apollo Solo Heritage Edition is worth the investment. Ultimately, both interfaces have their strengths, catering to different segments of the audio production market.

