Alongside the almost identical SSL 2+, the SSL 2 is the first audio interface from the long-established British company Solid State Logic, which is most likely known to many musicians and sound engineers for its large mixing consoles. The 4000-series consoles (often referred to as "4K") have a legendary reputation and the SSL 2 interface is reminiscent of this series both visually and sonically. Each channel features a Legacy 4K button with which SSL have distilled two essential characteristics of the 4K sound into a single circuit, adding analogue colouration when the user needs to breathe some life into "dull" or "lifeless" sounding input sources, but more on that below. Apart from this special feature, the SSL 2 is a typical two-channel USB interface with LEDs and a large monitor mix control, and it comes at a surprisingly low price by SSL standards.
The two Neutrik inputs on the back of the SSL 2 interface serve as combo sockets, allowing both microphones (with optional 48V phantom power) and instruments to be connected. The single headphone output and a pair of monitor outputs (all in 6.35mm jack format) are joined by a USB-C port, which supplies the SSL 2 with power. The first thing that catches the eye on the top of the interface is the large, baby-blue monitor level control, which, as a nice touch, goes up to "11" and not just "10" ("Spinal Tap" would be proud). There are also rotary controls for gain, headphone volume, and direct monitoring (crossfading between the input and the signal coming in via USB).
The SSL 2 is designed for sound and quality-conscious beginners who only require two inputs and outputs while also seeking the focused and punchy sound of the SSL 4000. The first thing that engaging the Legacy 4K button will do is introduce a "forward", yet musical high-frequency EQ boost, while also injecting a controlled amount of finely-tuned, sweet-sounding harmonic distortion into the signal path. The two inputs can be switched from line to Hi-Z, which allows for the simultaneous recording of an electric guitar as well as vocals with a condenser microphone. For users who need MIDI sockets, we recommend the SSL 2+, which also offers even more outputs.
Solid State Logic (SSL), is a renowned British manufacturer of high-end mixing consoles and hardware. It was founded in 1969 by Colin Sanders and is based in Begbroke, Oxfordshire. Initially the company developed transistors to control church organs, hence the name Solid State Logic. At the end of the 1970s they made huge advances in the domain of large mixing consoles with the 4000 series which pioneered the oncoming era of the ‘super’ consoles. Later, the 6000 and 9000 series also proved to be a great success and are still being used in countless recording studios all over the world. In 2005, Peter Gabriel and David Engelke took a majority stake in the company and then sold it to the Audiotonix Group in 2017.
Weighing in at just over 800 grams, the SSL 2 is a robust and rather compact unit powered via USB. As such, it is ideal as a mobile interface when used with a laptop running a DAW (digital audio workstation), for example. As a class-compliant device, it does not require a driver for Mac, while suitable software is available for Windows on the SSL website. What is more, a small software package is included in the scope of delivery so that beginners can get started straight away: SSL Native PlugIns (Vocalstrip 2 and Drumstrip), two entry-level DAWs (Avid Pro Tools First (plus plugins) and Ableton Live Lite), 1,5GB of Loopcloud samples, and Native Instruments Hybrid Keys and Komplete Start.