SSL Audio Interface roundup
Ssl Audio Interface: A Complete Buyer's Guide
The SSL interface range spans from the two-input SSL 2 to the multi-channel SSL 18. This buyer's guide explains exactly what each model adds, when the step-up is worth it, and what to buy for your use case.
James Harrison's guide to buying an SSL audio interface covers the specific differences between each model in the range, the features that justify moving up the line, and what each tier of the range is actually for.
Starting Point: What Do You Actually Need?
Before choosing a model, establish the basics: how many simultaneous inputs do you regularly record? Do you need MIDI? Do you switch between two sets of monitors? Do you use outboard hardware that requires additional I/O? Most home recordists who track one source at a time — a vocalist over a backing track, a guitarist with one microphone — need two inputs at most. A multi-piece band recording live needs far more. Match the interface to the actual recording workflow, not to a theoretical maximum.
SSL 2: The Entry Model
The SSL 2 is bus-powered (USB-C), has two mic/line inputs, a headphone output and the Legacy 4K character circuit. At around £200, it sits at the upper end of the entry-level home studio market. The two preamps are Class A discrete — noticeably quieter and more headroom-rich than many competing interfaces at a similar price. The 4K button adds an optional high-frequency saturation that gives the recordings a character aligned with the SSL console sound. For a single recordist tracking vocals, acoustic guitar, voice-over or podcast audio, the SSL 2 is the correct model in the range.
SSL 2+: When to Step Up
The SSL 2+ costs approximately £30 more than the SSL 2 and adds: MIDI in/out, a second set of monitor outputs (Alt monitoring), and a front-panel Hi-Z instrument input that is more conveniently positioned. The core preamps and conversion are identical to the SSL 2. Buy the SSL 2+ if you use hardware synthesisers or drum machines that require MIDI connectivity, or if you need to switch regularly between two sets of monitors without repositioning cables. Otherwise, the SSL 2 is sufficient.
SSL 12: Multi-Input Recording
The SSL 12 provides four microphone preamps, four further line inputs (eight inputs total via combo jacks), ADAT input (adding up to eight more channels from a compatible preamp box), MIDI I/O, loopback routing and multiple monitor outputs. It requires mains power. This is the model for small studios recording multiple musicians at once — drums with four or more microphones, or a band tracking live in a room. The preamp quality remains comparable to the SSL 2 and SSL 2+ and carries the same 4K character circuit. The SSL audio interface at this level competes directly with the Focusrite Scarlett 18i20 and Universal Audio Volt 476.
SSL 18: Larger Setups
The SSL 18 adds further I/O beyond the SSL 12 — additional outputs for complex monitor setups, more ADAT connectivity and comprehensive routing options. It is designed for producers who need to integrate outboard hardware extensively, or small commercial studios with complex signal chains. At this price point, the alternatives include the RME Babyface Pro and Audient iD44. The SSL 18 is justified by its preamp quality and brand credibility in a professional studio context.
Software Bundle
All models ship with Ableton Live Lite, Avid Pro Tools Artist (limited version, requiring an Avid account) and a collection of plug-ins including Plug-in Alliance and Native Instruments content. This software bundle is competitive with equivalent bundles from Focusrite and Universal Audio. Live Lite is a practical starting DAW for producers exploring performance-based recording; Pro Tools Artist suits the more traditional session-based workflow.
Buying Tips
- Check stock availability — SSL interfaces are popular and occasionally short supply at authorised UK retailers. Avoid grey-market purchases that void the warranty.
- USB-C cables are included but a high-quality, short USB-C cable to the computer reduces potential interference issues.
- The SSL 2 and SSL 2+ do not require the SSL 360° software — routing and monitoring are handled by front-panel controls. The SSL 12 and above benefit from the software for more complex routing.
Bottom Line
Buying the right SSL audio interface is straightforward: SSL 2 for one-at-a-time home recording, SSL 2+ if MIDI or dual monitors matter, SSL 12 for multi-input project studio work. For full context on what sets the SSL range apart, the complete guide covers the technical details.
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