6
Hardware Features
Front Panel
2 1 1 11
4
2 8 9 9
3 355 3 10 6 75 43 5
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, instruments
(e.g., guitar), or line level signals via XLR or ¼” jacks as appropriate. 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 XLR contacts of the Combi connectors
for mic inputs 1 & 2 and 3 & 4 respectively. The switches each have an associated red LED
indicating that phantom power is selected.
3. Gain 1 to 4 – four rotary controls: adjust the input gain for the signals at Inputs 1 to 4
respectively.
4. INST – two red LEDs which illuminate when INST mode is selected for the jack contacts of
Inputs 1 or 2 from Focusrite Control software. When INST is selected, the gain range and input
impedance are altered (relative to LINE), and the input is made unbalanced. This optimises
it for the direct connection of instruments via a 2-pole (TS) jack plug. When INST is off, the
inputs are suitable for the connection of line level signals. Line level signals may be connected
either in balanced form via a 3-pole (TRS) jack or unbalanced, via a 2-pole (TS) jack.
5. AIR – four yellow LEDs – one per input - which illuminate when the AIR function is selected
for the input from Focusrite Control. AIR modifies the frequency response of the input stage
to model the classic, transformer-based Focusrite ISA mic preamps.
6. (Thunderbolt active) – a green LED which illuminates when the unit has established a
connection with the computer to which it is connected.
7. (Locked) – a green LED which confirms clock synchronisation, either to the Clarett 4Pre’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 configured in Focusrite Control to
adjust the level of any of the unit’s four 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 a completely independent mix by using Outputs 5
and 6 in the software. Each headphone output has its own volume control.
10. POWER – green LED confirming that DC power is connected.
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