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17
HARDWARE FEATURES
Front Panel
4
2
11
1084 55
3
6 7 9
The Front Panel includes the input connectors for Mic, Line and Instrument signals, as well as the
input gain and monitoring controls.
1. Inputs 1 & 2 – “Combo” type input sockets - connect microphones, instruments (e.g.,
guitar), or line level signals here. Combo sockets accept both XLR and ¼” (6.35 mm) jacks.
Microphones will normally be connected using XLR plugs: instruments and line level signals
should be connected via ¼” (6.35 mm) jack plugs of either TR or TRS type. The preamp gain is
appropriate for microphones when an XLR plug is inserted, and for higher level signals when
a jack plug is inserted. Do not connect anything other than a microphone - e.g., the output
of a sound module or FX unit - via an XLR plug, as the signal level will overload the preamp,
resulting in distortion; also, if phantom power is enabled, the equipment may be damaged.
2. GAIN 1 and GAIN 2 – adjust the preamp gain for signals on inputs 1 and 2 respectively. The
gain controls have concentric tri-colour LED ‘rings’ to confirm signal level: green indicates
an input level of at least -24 dBFS (i.e., ‘signal present’), the ring then turns amber at -6 dBFS
to indicate that the signal is close to clipping, and finally to red at 0 dBFS (digital clipping).
3. 48V – phantom power switch for mic inputs - enables 48 V phantom power at the XLR contacts
of both Combo connectors.
4. INST – Line/Instrument level switches for each input which alter gain and input impedance to
suit either instrument or line level signals. ‘INST’ illuminates red when Instrument mode is
selected. Note that INST may also be selected from Focusrite Control.
5. AIR – two switches enabling AIR mode for each input. AIR modifies the frequency response of
the input stage to model the classic, transformer-based Focusrite ISA microphone preamps.
‘AIR’ illuminates yellow when the mode is selected. Note that AIR may also be selected from
Focusrite Control.
6. MONITOR – main monitor output level control - sets the output level at the main (rear panel)
outputs LEFT and RIGHT.
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