TL Audio C-1 - Manual (Page 10)

OPERATION.
Front Panel.
The front panel controls for one channel are identified in fig.2.
Input Stage.
Ensure that the correct input connector, mic or line, is being used and that the front
panel switch is set to the appropriate position. Note that both mic and line inputs may
be connected at the same time, but only one is selected.
The input selector switch selects between the line input, mic input, mic with +48V
phantom power (signalled by a red LED), and the Aux input.
CAUTION: Switching phantom power on, or plugging a microphone in with
phantom power applied, may cause a click or thump in your loudspeakers. To prevent
this happening, ensure that the system gain is set to minimum (e.g. on your mixing
console fader or power amplifier), before operating the switch or plugging in a
microphone.
If the gain required is not known, set the control to minimum with the EQ by-passed,
and gradually increase the gain until the required output level is achieved.
Auxiliary Input.
The front panel auxiliary input sockets may be switched between high level signals
(“Keyboard”) and low level pick-ups (“Guitar”), and are provided with an input gain
control. Note that the channel gain controls remains operative when the Aux input is
selected.
The two aux input sockets may be used, for example, for a stereo keyboard. The
compressors may be operated independently, or linked for true stereo operation.
Aux A input is also normalled to the B input, so both channels may be driven from a
mono input (guitar, etc). With different channel gain settings, one channel may be
lightly compressed, whilst a higher degree of compression is applied to the high gain
channel, resulting in stereo effects from a mono input.