1/4" Trs Input; Pre-Amp; Hpf - Focusrite TrakMaster Pro Manual

1/4" TRS INPUT

A line (and instrument) input is provided on the front panel via a balanced 1/4" TRS
jack socket. An unbalanced signal will be accepted when in instrument mode.
Connecting a jack plug into the front panel line input automatically cuts the mic XLR
input and selects an appropriate gain calibration for the LEVEL dial in the Preamp
section.
LINE/INST (Switch)
When engaged (in), the 1/4" TRS INPUT will accept an unbalanced instrument signal
and the LEVEL dial in the Preamp section will be calibrated to an appropriate level.

PRE-AMP

LEVEL (Knob)
This sets the level of the incoming signal. Connect an input signal to the unit, ensuring
that the LEVEL control is set fully anti-clockwise, and increase the LEVEL control
until a signal is displayed on the front panel meter (ensure that input is selected as the
source for the meter - see LEVEL section) or at the destination (recording medium). If
the meter displays above 0dBFS, you should reduce the LEVEL. It is advisable to set
the incoming signal to be an average of around -10dBFS, peaking at around -6dBFS to
allow some headroom for occasional sudden loud bursts.
With a MIC INPUT connected to the XLR connector (ensure nothing is connected to
the 1/4" TRS input), the LEVEL control provides +13dB (fully anti-clockwise) to
+60dB (fully clockwise) of gain.
With a LINE INPUT connected to the 1/4" TRS connector, the gain is adjustable
from -10dB (fully anti-clockwise) to +36dB (fully clockwise).
With the INST switch activated and an instrument connected to the 1/4" TRS input,
the LEVEL control provides +13dB to +60dB of gain.

HPF

(Switch)
This is a high-pass filter, which removes unwanted low frequencies such as stage rumble
via microphone stands or 'proximity effect' (where low frequencies are over-emphasised
when using certain types of microphone at close range). Engaging the switch inserts a
2-pole HP filter (-3dB at 120Hz) into the signal path.
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