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8
Hardware Features
Front Panel
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The front panel includes all input gain and monitoring controls as well as two input connectors for
Mic, Line and Instrument signals.
1. INPUTS 1 & 2 – Combo XLR input sockets - 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 Combo connectors’ XLR contacts
for mic inputs 1-4 and 5-8 respectively. (Note that inputs 3 to 8 are on the rear panel.) 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 8 – eight rotary controls: adjust input gain for signals at Inputs 1 to 8 respectively.
4. INST – two red LEDs which illuminate when Instrument mode is selected for the jack
Inputs 1 or 2 from Focusrite Control software. When INST is selected, gain range and input
impedance are altered (relative to LINE), and the input is made unbalanced. This optimises
it for connecting instruments directly via a 2-pole (TS) jack plug. When INST is off, you can
connect 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 – eight yellow LEDs – one per input - which illuminate when AIR function is selected for
the input from Focusrite Control. AIR modifies the input stage’s frequency response to model
classic, transformer-based Focusrite ISA mic preamps.
6. Meters – ten 6-segment LED bargraph meters indicating a) the signal levels of the eight
analogue input signals (meters 1 to 8), and b) the signal levels at the MONITOR 1 and 2
outputs (meters L and R). The input meters show signal level after the input gain stage. The
output meters show signal level before the monitor level control [10], which therefore does
not affect their indication. The LEDs illuminate at -42 (green, “signal present”), -18 and -12
dBFS (green), -6 and -3 dBFS (yellow) and 0 dBFS (red). 0 dBFS implies digital clipping, and
should always be avoided.
7. (USB active) – a green LED which illuminates when the unit has established a connection
with the computer to which it is connected.
8. MIDI – a green LED which illuminates when MIDI data is being received at the rear panel
MIDI IN port.
9. (Locked) – a green LED which confirms clock synchronisation, either to the Clarett+ 8Pre’s
internal clock or to an external digital input.
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