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Hardware Features
Front Panel
The front panel includes the input gain controls and input connectors for Mic, Line and Instrument
signals for both channels, and also the monitoring controls.
1.
INPUTS 1 & 2 – Combo XLR input sockets for each channel - connect microphones via an
XLR connector, or instruments (e.g., guitar) or line level signals via ¼" jacks. 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 and 2 respectively. Each switch has an associated red LED indicating that
phantom power is selected. Note that phantom power is only required by condenser and
active ribbon mics; do not select phantom power when using dynamic mics.
3.
Gain 1 and 2 – two rotary controls: adjust the input gain for the signals at Inputs 1 and 2
respectively. The gain controls have concentric bi-colour LED 'halos' to confirm 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 INST mode is selected for the jack contacts of
Inputs 1 or 2 from Focusrite Control software. When INST is selected, the line input is converted
to a high impedance unbalanced input suitable for the direct connection of instruments via a
2-pole (TS) jack plug.
AIR – two yellow LEDs which illuminate when the AIR function is selected for each input
5.
from Focusrite Control. AIR modifies the frequency response of the input stage to model the
classic, transformer-based Focusrite ISA microphone preamps.
6.
(USB active) – a green LED which illuminates when the unit has established a connection
with the host computer to which it is connected.
7.
(Locked) – a green LED which confirms clock synchronisation, either to the Clarett 2Pre
USB's internal clock or to the external digital input.
MONITOR – main monitor output level control – this control will normally control the level
8.
at the main monitor outputs on the rear panel, but can be configured in Focusrite Control to
adjust the level of either or both pairs of analogue outputs.
9.
(Headphones) – connect a pair of stereo headphones at the ¼" TRS jack socket below
the control. The headphone output always carries the signals currently routed to analogue
outputs 3 and 4 (as a stereo pair) in Focusrite Control.
10. POWER – green LED confirming that DC power is connected.
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