Solid State Logic SSL 18 User Manual 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. Outputs 3 & 4 can be set up as a secondary ALT pair of monitors (switchable to be controlled by the Monitor Knob when
the ALT button is engaged).
Output Pairs 1&2 and 3&4 can be switched between +24 dBu and +9 dBu via SSL 360°.
Outputs 3-10 are fixed at professional +24 dBu output operating levels.
All Outputs (including headphone outputs) are also DC-coupled and able to send +/-5v signal to allow CV control to Semi & Modular
Synths, Eurorack and CV-enabled outboard FX. Please Note: More information is available in the CV Control via Ableton® Live CV
Tools section in this User Guide.
A few things to be aware of when using the DC-coupled outputs:
When using output 1-2 for CV output, remember the Monitor Control Knob is still affecting the signal. Some experimentation on finding
the best level for your connected CV controlled synth/FX unit may be required.
Meters in the 360° Mixer are DC-coupled hence you can still expect them to work and show a DC signal.
9. T/B INPUT
Combo XLR / 1/4" Jack Input Sockets. Mic level (XLR) and Line-Level input (TRS).
A dedicate talkback input with Listen Mic Compressor (LMC). The LMC is engaged/disengaged via SSL 360°.
The Talkback input has a built-in preamp with 3 fixed gain settings to choose from via the SSL18 SSL 360° Mixer: 30/40/50 dB.
+48V can be engaged if your talkback microphone requires it.
Uniquely, the talkback input can be switched to LINE input mode (TRS jack connection), which is helpful if you want to use an external
talkback mic preamp or this can also be used for re-processing in sterile stems to processed for that classic smashed compression
effect.
10. INPUTS 3-8