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SSL 18 User Guide
Introduction to SSL 18
26-in/28-out, high-performance USB audio interface
Introducing SSL 18, the head of state in Solid State Logic's celebrated line of USB audio interfaces. Building upon the success of SSL
2/2 MK II and SSL 12, SSL 18 raises expectations for 19" USB audio interfaces, with exemplary audio performance and a studio-
session-ready feature set that caters for engineers and producers who demand the highest possible standards for their music. Its
effortless integration with other professional equipment makes it the ultimate centrepiece for the serious project studio, whether you
are recording, producing or mixing. SSL 18 doesn't need flashy gimmicks— just that rock-solid, world-class SSL sound that we all
know and love. 
Why Choose SSL 18?
Best-In-Class Audio Performance
Next generation 32-bit/192 kHz converters provide the platform for SSL 18's analogue design to shine, with unrivalled dynamic range
performance of 120 dB across all microphone, line-level and instrument inputs – capture your sources like never before. Then,
experience an incredible 125 dB dynamic range on the monitor and line outputs to hear your music with uncompromised fidelity. Need
to work on headphones? No problem, with the unbeatable 120 dB dynamic range on offer from the dual-headphone outputs.
The Ultimate Studio Hub
SSL 18 is the only product in its category that is designed to properly integrate with professional outboard gear, thanks to the +24 dBu
capable inputs and outputs. What's more, all analogue outputs are DC-coupled, making them ideal for sending control voltages to
synthesisers. A host of digital audio connections means that SSL 18 is ready to expand your I/O count whenever you are, with an
additional 16 channels via ADAT and a further 2 via S/PDIF. 
19" Rack Personal SSL Recording Studio 
SSL 18 has all the flexibility you'd expect from an SSL equipped studio: a dedicated talkback input with the famous LMC (listen mic
compressor), alternative speaker switching, flexible headphone outputs that can be reconfigured to work with any set of headphones
and the ability to re-purpose outputs 9 and 10 as analogue insert sends on inputs 1 and 2, perfect for tracking with analogue
processing in-line.
SSL 18 Mixer Powered by SSL 360°
The SSL 18's on-board low-latency mixer is controlled via SSL 360° – the place where you can dial in headphone mixes, adjust
metering preferences, customise the front panel buttons and much more. Think of it as your virtual SSL console environment, perfect
for managing busy sessions all from one place.
Engineered For Excellence
Designed by the same engineering team behind the esteemed range of analogue and digital mixing consoles, SSL's rich heritage and
know-how for multi-track audio is laced throughout the design. From the class-leading microphone preamps to the choice of industry-
grade components like Alps® pots and Neutrik® connectors, SSL 18 delivers the kind of quality you'd expect from a world-class
recording studio, directly to your own studio.
Features
• 26-in/28-out USB audio interface for Mac and Windows

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Summary of Contents for Solid State Logic SSL 18

  • Page 1 The Ultimate Studio Hub SSL 18 is the only product in its category that is designed to properly integrate with professional outboard gear, thanks to the +24 dBu capable inputs and outputs. What’s more, all analogue outputs are DC-coupled, making them ideal for sending control voltages to synthesisers.
  • Page 2 ▪ Customise the monitoring section front panel buttons to suit your workflow Defaults are CUT monitoring, ALT monitor switching and TALKBACK on/off ▪ Save/Load SSL 18 Mixer profiles for various workflows – e.g. create tracking templates, mixing templates • Stereo Loopback with selectable loopback source •...
  • Page 3 USB Cables & Power Please connect the SSL 18 to your computer using the provided USB cable. The connector on the rear of SSL 18 is a 'C' type. The type of USB port you have available on your computer will determine if the USB C to A adapter is required. Newer computers may have 'C' ports, whereas older computers may have 'A'.
  • Page 4 SSL account at www.solidstatelogic.com/login should you wish to download the software another time. Quick-Start Driver Installation 1. Connect your SSL USB audio interface to your computer using the included USB cable. 2. (Windows) Download and install the SSL 18 USB ASIO/WDM Driver for your SSL 18. ...
  • Page 5 SSL USB Control Panel will be installed onto your computer. This Control Panel will report details such as what Sample Rate and Buffer Size your SSL 18 is running at. Please note that both Sample Rate and Buffer size will be taken control of by your DAW when it is opened.
  • Page 6 Downloading SSL 360° Software For full control of SSL 18 and its Low-Latency Mixer, you'll need to install SSL 360°. SSL 360° is the brain behind your SSL 18 Mixer and controls all internal routing and monitoring configuration. Once you have connected your SSL 18 hardware to your computer as...
  • Page 7 DAW that supports Core Audio on Mac or ASIO/WDM on Windows. No matter which DAW you are using, you need to ensure that SSL 18 is selected as your audio device in the audio preferences/ playback settings. Below is an example in Pro Tools. If you are unsure, please refer to your DAW's User Guide to see where these...
  • Page 8 The pair of combo XLR/Jack inputs accepts Mic level (XLR), Line-Level (TRS) or Instrument signals (TS). Mic/Line switching can be done from the front panel or via the SSL 18 Mixer software in SSL 360°. Instrument input can only be switched to via the SSL 18 Mixer software.
  • Page 9 There is also a clock source information with DIGI for external clocking via ADAT or S/PDIF & the USB light for Internal clocking, and then below there is IN & OUT to display if the meters are showing input or Output signal, controllable via the SSL 18 360° Mixer page. ...
  • Page 10 4. MIDI IN & OUT The MIDI (TS Mini-Jack 'Type A' standard) IN & OUT allow the SSL 18 to be used as a MIDI interface. MIDI IN will receive MIDI signals from keyboards or controllers & MIDI OUT allows MIDI information to be sent out to trigger Synths, Drum machines or any...
  • Page 11 & 10/2 SND. By default, these act as standard outputs 9 and 10 from SSL 18. However, in the SSL 360° SSL 18 Mixer Settings menu, you can re- purpose the outputs to be used as inserts sends that are moved from the outputs, to be placed in the record path of analogue inputs 1 &...
  • Page 12 The diagram above shows the routing connections for the INSERTS on the back of the Interface.  8. 10 x BALANCED OUTPUTS 1/4" TRS Jack Output Sockets Outputs 1 & 2 are primarily to be used for your main monitors and the physical volume is controlled by the Monitor Knob on the front of the Interface.
  • Page 13 3. Connected Units This area shows if you have SSL 360° hardware (SSL 18, SSL 12, UF8, UF1 & UC1) connected to your computer, along with its serial number. Please allow 10-15 seconds for units to be discovered once they are plugged in.
  • Page 14 10. Export Report Should you encounter any issues with your SSL 18 or SSL 360° software, you may be asked by a support agent to use the EXPORT REPORT feature. This feature generates a text file containing the essential information about your computer system and SSL 18, alongside technical log files relating to SSL 360°...
  • Page 15 • Customise the monitoring section front panel buttons to suit your workflow  Defaults are CUT monitoring, ALT monitor switching and TALKBACK on/off • Save/Load SSL 18 Mixer profiles for various workflows – e.g. create tracking templates, mixing templates etc  VIEW Within the mixer, use the VIEW buttons on the right-hand side to hide/show different input channel types (Analogue Inputs, Digital Inputs, Playback Returns) and the Aux Masters.
  • Page 16 The meters indicate the incoming signal level to the channel. A red segment at the top of the meter indicates clipping. Click on the meter to clear the clip indication. The +48V, LINE, HIGH-PASS FILTER,POLARITY INVERT & 4K functions can be controlled from either the hardware or SSL 18 software mixer.
  • Page 17 • INSERT button allows the insertion of analogue outboard equipment into the record path for inputs 1 and 2. To do this, Outputs 9 and 10 must be re-configured as insert sends via the SSL 18 settings menu. If the INSERT button is greyed out, this has not been configured. ...
  • Page 18 9. MIX ROUTES OFF Engaging the MIX ROUTE OFF button will prevent the signal from a particular channel from entering the SSL 18 Mixer altogether, and therefore prevent it being routed to the monitor or aux busses. For Input channels - the signal will still be sent into the DAW regardless of MIX ROUTES OFF being engaged.
  • Page 19 SSL 18 Mixer, but audio form 'Outs 7-8' and 'Outs 9-10' will still be sent out of the physical Outputs 7-8 and 9-10. This is desirable if using these outputs for hardware inserts. An example of when it is useful to use MIX ROUTES OFF: You want to use Analogue Inputs and Outputs 7-8 to connect some analogue outboard equipment and use this as hardware inserts in your DAW.
  • Page 20 When illuminated green, the built-in TALKBACK mic will send the signal to the routed aux buss(es) (HP A, HP B & LINE 3-4). This can also be controlled by physically engaging the TALK button on the SSL 18 Interface (if assigned), or via the SSL 360° TALK software button itself.
  • Page 21 DIGITAL INPUTS Up to 16 channels of ADAT Inputs and Outputs can be addressed by SSL 18, with the ADAT inputs showing up in the SSL 18 Mixer. 2 channels of S/PDIF I/O are also available, with the S/PDIF inputs also shown on their own input channel in the SSL 18 Mixer.
  • Page 22 1. DIRECT TO BUS: MON L-R (Playback Returns 1-2) Engaging the DIR button will send DAW Mon L/R outputs directly to the SSL 18 Monitor Bus (OUT 1-2), bypassing the Routing Matrix. Enabling MIX ROUTES OFF will prevent any audio sent from the DAW or audio playback software on 'Outs 1-2'  from reaching physical Outputs 1-2.
  • Page 23 6. ROUTING MATRIX When the DIRECT Button is disengaged, the signals can be routed to the HP A, HP B & LINE 3-4 bus from the SSL 18 Mixer. As with the Input Channels, sends to the aux busses are controlled via the HP A, HP B & LINE 3-4 Send Level Knobs, with Pan, and muting button also accessible. ...
  • Page 24 renamed by the user. 8. FADER TRAY SECTION The fader controls the level sent to the Monitor Bus for each Playback Return Channel (providing DIRECT is disengaged and MIX ROUTES OFF is not engaged), as well as providing SOLO, CUT & PAN functionality. MON button routes the signal onto the Monitor Bus (Outputs 1-2).
  • Page 25 AUX Masters The Aux Masters section of the Mixer View consists of Headphones A, Headphones B & Line Out 3-4 Aux Master Outputs. Headphone Outputs Each Headphone Output consists of a large Signal Metering section with a resolution from 0dB down to -60dB.  Below are details of the Fader section with the following parameters: 1.
  • Page 26 Switches the output to Mono, summing both L&R signals together.  6. FADER Sets the master level for the HP Bus. Remember this is pre-physical gain control on the SSL 18 front panel. 7. MIRROR OUT Allows you to route an aux master bus output directly to a physical output.
  • Page 27 Left: Sends when Line 3-4 is linked , Right: Sends when Line 3-4 are unlinked. When unlinked all input channels in the SSL 18 mixer will change their Line 3&4 sends to individual levels & mutes. If already set as a send to 3&4, the levels already set will be maintained in Mono between each channel. ...
  • Page 28 A/Bing between two different sets of speakers for a more accurate comparison.  SETTINGS     In the bottom-Left next of the SSL 18 Mixer or above the Monitoring Section on the right, you can access the Settings panel, which contains configuration options for the SSL 18. ...
  • Page 29 HEADPHONE A & B OUTPUTS MODES The HP outputs can operate in one of 2 modes: • Headphones Mode • Line Output Mode  Headphones Mode Options When operating in Headphones Mode, you can choose between 3 different options: • Standard - The default setting and is suitable for a wide range of headphones. •...
  • Page 30 Please note if Analogue Inputs 1-2 are stereo linked, both options will be toggled together upon your mouse click. When enabled, an INSERT button will become available on Analogue channels 1/2 in the SSL 18 Mixer as highlighted in blue below: Tip: Alternatively, INSERT RTN 1 &...
  • Page 31 FRONT PANNEL BUTTONS SSL 18 features customisable options for the channel functions for three buttons labelled LINE, HPF & 4K on the front panel.  In the Settings menu, each button can be reassigned to an alternative function, choosing between LINE, HPF, 4K & POLARITY INVERT, as depicted in the image below: ...
  • Page 32 • It allows SSL 18's outputs to operate at 176.4 or 192 kHz, instead of downsampling them. • When I/O Mode is not engaged (SSL 18 Mixer is active) and you are operating at sample rates of 176.4 or 192 kHz, SSL 18's outputs are automatically downsampled to 88.2 or 96 kHz in order to preserve the full mixing capability of the mixer.
  • Page 33 The drop-down menu allows the user to select the internal Sample Rate that the SSL 18 Interface will operate at. The selection allows for 44.1 kHz, 48 kHz, 88.2 kHz, 96 kHz, 176.4 kHz & 192 kHz. Note, that when any DAW is opened, SSL 18 will follow the DAW's sample rate setting.
  • Page 34 The below image demonstrates this with an explanation text box when hovering the mouse over the SENDS POST on the HP B Channel.  Solo Clear The Solo Clear button allows you to quickly clear any active solo's (or AFLs) in the SSL 18 Mixer. When any channels have been put...
  • Page 35 • Please note that multiple CV Utility plugs can be set up when using the SSL 18 as EVERY PHYSICAL OUTPUTis able to send DC signal for CV Control. Therefore you can use up to 8 CV control signals at any one time using CV Tools and an SSL 18 Requirements for CV Tools •...
  • Page 36 When using Outputs 7-8 and 9-10 for CV Control (HP A and HP B), be careful to first unplug any attached headphones from the front panel outputs. ▪ When using these outputs with for CV control, we found that using High Impedance Headphones Mode or Line Output Mode with unbalanced ticked generally provided the most reliable results.
  • Page 37 Talkback Input Max input level (XLR) -10 dBu Max input level (TRS) 24.5 dBu Gain (XLR) 30, 40, 50 Frequency response (XLR) +/- 0.04 dB Frequency response (TRS Line) +/- 0.03 dB Dynamic range (min gain, A-weighted)  110 dB Dynamic range (TRS Line, A-weighted)  112 dB THD+N (XLR, -1dBFS input level) 0.007%...
  • Page 38 Depth: 360 mm / 14.2 inches Boxed Weight 5.78 kg / 12.74 lbs Troubleshooting, FAQs, Important Safety Notices Frequently Asked Questions and additional support contacts can be found on the Solid State Logic Support website. General Safety • Read these instructions. • Keep these instructions.
  • Page 39 EU Compliance SSL 18 Audio Interfaces are CE compliant. Note that any cables supplied with SSL equipment may be fitted with ferrite rings at each end. This is to comply with the current regulations and these ferrites should not be removed.
  • Page 40 Industry Canada Compliance This Class B digital apparatus complies with Canadian ICES-003. Cet appareil numérique de la classe B est conforme à la norme NMB-003 du Canada. Evaluation of apparatus based on altitude not exceeding 2000m. There may be some potential safety hazard if the apparatus is operated at altitude exceeding 2000m.