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Solid State Logic SSL 2 Plus MKII USB Audio vs Universal Audio Apollo Solo Heritage Edition, APLS-HE

Updated August 2026 — Universal Audio Apollo Solo Heritage Edition, APLS-HE leads on features and portability.

The Solid State Logic SSL 2 Plus MKII offers excellent value and features for its price, while the Universal Audio Apollo Solo Heritage Edition provides premium capabilities for professionals.

Why Solid State Logic SSL 2 Plus MKII USB Audio is better

Price

SSL 2 Plus MKII is significantly cheaper.

User-Friendly

Designed for both novices and professionals.

Software Bundle

Includes SSL Production Pack.

Why Universal Audio Apollo Solo Heritage Edition, APLS-HE is better

Audio Quality

Superior UA audio conversion.

Plug-ins

Includes $1,300 worth of premium plug-ins.

Processing Power

Offers UAD SOLO Core processing.

Overall score

Solid State Logic SSL 2 Plus MKII USB Audio
85
Universal Audio Apollo Solo Heritage Edition, APLS-HE
92

Specifications

SpecSolid State Logic SSL 2 Plus MKII USB AudioUniversal Audio Apollo Solo Heritage Edition, APLS-HE
Mic Preamps22
AD/DA Conversion32-bit / 192 kHzClass-leading
Bundled SoftwareSSL Production Pack5 UAD Plug-ins
Connection TypeUSBThunderbolt 3
MonitoringZero-LatencyBest-in-class

Dimension comparison

Solid State Logic SSL 2 Plus MKII USB AudioUniversal Audio Apollo Solo Heritage Edition, APLS-HE

Overview of the Solid State Logic SSL 2 Plus MKII

The Solid State Logic SSL 2 Plus MKII is priced at $299.99 and is designed for musicians, producers, and engineers who seek high-quality audio performance. This audio interface offers a user-friendly design and a range of features that cater to both novices and seasoned professionals. With a sales rank of 6,139, it demonstrates a solid presence in the audio interface market.

The SSL 2 Plus MKII boasts dual XLR mic preamps, four balanced outputs, and two discrete headphone outputs, making it versatile for various recording setups. Its 32-bit / 192 kHz AD/DA converters promise exceptional sound quality, while additional features like zero-latency monitoring and a MIDI I/O connection enhance its functionality. The interface also comes bundled with the SSL Production Pack software, providing users with essential tools for music creation.

Overview of the Universal Audio Apollo Solo Heritage Edition

In contrast, the Universal Audio Apollo Solo Heritage Edition has a significantly higher price tag of $599.00, making it about 100% more expensive than the SSL 2 Plus MKII. With a sales rank of 4,750, it is popular among audio professionals seeking premium features.

This interface offers UAD SOLO Core processing, allowing users to track audio through vintage compressors and other high-quality plug-ins with near-zero latency. It features two Unison mic preamps and comes bundled with a suite of five award-winning plug-ins valued at over $1,300. The Apollo Solo Heritage Edition also runs on Thunderbolt 3, enhancing its connectivity and performance in professional settings.

Audio Quality Comparison

When it comes to audio quality, both interfaces are designed to deliver exceptional sound. The SSL 2 Plus MKII features 32-bit / 192 kHz AD/DA converters, ensuring high fidelity for recordings. This level of conversion is suitable for serious music production and is backed by the heritage of Solid State Logic, a name synonymous with quality in the audio industry.

On the other hand, the Apollo Solo Heritage Edition is noted for its class-leading UA audio conversion. The inclusion of Unison mic preamp technology means that users can emulate renowned preamps from brands like Neve and API, further enhancing the audio quality. This capability may be especially beneficial for professionals looking to achieve specific tonal characteristics in their recordings.

Connectivity Features

The Solid State Logic SSL 2 Plus MKII offers a range of connectivity options, including two XLR mic inputs, 1/4" line inputs, and MIDI I/O on 5-pin DIN jacks. This variety allows for flexibility in connecting different instruments and devices, making it suitable for live-studio setups as well as home studios.

Conversely, the Apollo Solo Heritage Edition uses a Thunderbolt 3 connection, which provides fast data transfer speeds and low latency. It is designed to be bus-powered, which simplifies setup and reduces cable clutter. The Apollo also supports various DAWs, including Logic Pro and Pro Tools, making it versatile for users who work across different platforms.

Software and Plug-ins

The SSL 2 Plus MKII comes with the SSL Production Pack software bundle, providing essential tools for music creation. While it may not have the extensive plug-in offerings of the Apollo, it still delivers valuable resources for musicians and producers just starting out or looking for solid quality.

In contrast, the Apollo Solo Heritage Edition includes a premium suite of five award-winning plug-ins, valued at over $1,300. This special edition is designed to give users access to high-end processing capabilities right out of the box. The inclusion of these plug-ins can significantly enhance the recording process, especially for professionals looking to incorporate vintage sounds into their music.

Portability and Design

Portability is a key feature for both interfaces. The Solid State Logic SSL 2 Plus MKII is bus-powered, meaning it can be easily used on the go with a laptop. Its robust design makes it suitable for both studio and live environments, appealing to a wide range of users.

The Apollo Solo Heritage Edition also prioritizes portability, with its bus-powered design and compact size. Its Thunderbolt 3 connectivity allows for straightforward setup and easy transportation, making it ideal for mobile recording sessions. However, the higher price point may not appeal to all users, especially those who prioritize budget-friendly options.

Customer Support and Brand Reputation

Solid State Logic has a longstanding reputation in the audio industry, known for its innovation and quality. The SSL 2 Plus MKII is backed by this legacy, and while customer support details are not specified, users can expect a reliable experience based on the brand’s history.

Universal Audio is also recognized for its high-quality audio products and excellent customer support. The Apollo Solo Heritage Edition is backed by industry-leading technical support from knowledgeable audio engineers, which can be a significant advantage for users who may need assistance with their setup or troubleshooting.

Which should you buy?

Deciding between the Solid State Logic SSL 2 Plus MKII and the Universal Audio Apollo Solo Heritage Edition ultimately depends on your needs and budget. The SSL 2 Plus MKII, priced at $299.99, is about 50% cheaper than the Apollo Solo Heritage Edition and offers excellent audio performance along with robust features for aspiring and professional musicians alike.

However, if you are a professional seeking advanced processing capabilities and are willing to invest more, the Apollo Solo Heritage Edition's premium plug-in bundle and superior audio conversion technology may justify its higher price tag. Ultimately, both interfaces serve different user bases effectively, making your specific requirements the deciding factor in this comparison.