SoundCraft EFX12, Руководство пользователя

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MONO INPUT CHANNEL
1 Mic Input
The MIC input accepts XLR-type connectors and is designed to suit a wide range of
BALANCED or UNBALANCED signals. Professional dynamic, condenser or ribbon
mics are best because these will be LOW IMPEDANCE. You can use low-cost HIGH
IMPEDANCE mics, but the level of background noise will be higher. If you turn the
PHANTOM POWER on (top right-hand side of the mixer) the socket provides a suit-
able powering voltage for professional condenser mics.
TAKE CARE when using unbalanced sources, which may be damaged by the phan-
tom power voltage on pins 2 & 3 of the XLR connector.
Unplug any mics if you want to use the LINE Input. The input level is set using the
GAIN knob.
2 Line Input
Accepts 3-pole ‘A’ gauge (TRS) jacks. Use this input for sources other than mics,
such as keyboards, drum machines, synths, tape machines or DI’d guitars. The
input is BALANCED for low noise and top quality from professional equipment, but
you can use UNBALANCED sources by wiring up the jacks as shown below, al-
though you should then keep cable lengths as short as possible. Unplug anything
in the MIC input if you want to use this socket. Set the input level using the GAIN
knob.
3 Insert Point
The unbalanced, pre-EQ insert point is a break in the channel signal path, allowing
limiters, compressors, special EQ or other signal processing units to be added in
the signal path. The Insert is a 3-pole ‘A’ gauge jack socket which is normally
bypassed. When a jack is inserted, the signal path is broken, just before the EQ
section.
The Send may also be tapped off as an alternative pre-fade, pre-EQ direct output if
required, using a lead with tip and ring shorted together so that the signal path is
not interrupted (see below).
4 Gain
This knob sets how much of the source signal is sent to the rest of the mixer. Too
high, and the signal will distort as it overloads the channel. Too low, and the level of
ONLY connect condenser microphones with the +48V powering OFF,
and ONLY turn the +48V powering on or off with all output faders
DOWN, to prevent damage to the mixer or external devices.