8
Hardware Features
Front Panel
2 1 1 11
4
2 8 9 9
The front panel includes input gain and monitoring controls as well as four of the input connectors
for Mic, Line and Instrument signals.
1. Inputs 1 to 4 – Combo XLR input sockets for each channel - connect microphones via XLR
connectors, or line level signals via ¼” jacks. Instruments (e.g., guitar) may also be connected
via ¼” jacks to Inputs 1 and 2. Either TRS (balanced) or TS (unbalanced) jack plugs can be
used for instruments or line level signals.
2. 48V – two switches enabling 48 V phantom power at the combo connectors’ XLR contacts for
mic inputs 1 & 2 and 3 & 4 respectively. Each switch has a red LED to show when phantom
power is enabled. Note that not all microphones require phantom power. If you are unsure
whether your microphone needs it to work, please read the microphone documentation.
3. Gain 1 to 4 – four rotary controls: adjust input gain for signals at Inputs 1 to 4 respectively. The
gain controls have LED ‘halos’ to conrm signal level: green indicates an input level of at least
-42 dBFS (i.e., ‘signal present’), the ring then turns orange when the signal level reaches -6
dBFS, and red at 0 dBFS.
4. INST – two red LEDs which illuminate when Instrument mode is selected for the jack Inputs
1 or 2 from Focusrite Control software. When Instrument mode is selected, the line input is
converted to a high impedance unbalanced input. You can connect instruments via a 2-pole
(TS) jack plug here.
5. AIR – four yellow LEDs – one per input - which illuminate when the AIR function is selected
for the input from Focusrite Control. AIR modies the frequency response of the input stage
to model the classic, transformer-based Focusrite ISA mic preamps.
6.
(USB active) – a green LED which illuminates when the unit has established communication
with the computer to which it is connected.
7.
(Locked) – a green LED which conrms clock synchronisation, either to the Clarett 4Pre
USB’s internal clock or to an external digital input.
8. MONITOR – main monitor output level control – this control will normally control the level
at the main monitor outputs on the rear panel, but can be congured in Focusrite Control to
adjust the level of either or both pairs of analogue outputs.
9.
(Headphones) 1 and 2 – connect headphones here. The stereo mixes at these outputs
are set up in Focusrite Control: Headphone 1 always carries the same mix as Line Outputs
3 and 4, while Headphone 2 can provide an independent mix by using Outputs 5 and 6 in the
software. Each headphone output has its own volume control.
10. POWER – green LED conrming DC power is connected.
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