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22 Soundcraft MFXi MPMi User Guide Issue 1210
MIC
HF
LF
MF
1
33
6
6
99
12
12
15 15
0
-
+
33
6
6
99
12
12
15 15
0
-
+
010
010
010
LR
33
6
6
99
12
12
15 15
0
-
+
750
150
3.5k
GAIN
AUX1
AUX2
FX
PAN
0
PFL
MIX
SUB
PK
SP
5
0
-5
-10
-20
-30
MUTE
1
10
1
LINE
INSERT
1
2
4
5
6
8
11
12
7
13
3
9
15
14
10
MONO INPUT CHANNELS (MFXi shown)
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 suitable
powering voltage for professional condenser mics.
TAKE CARE when using unbalanced sources, which may be damaged by the phantom
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 6.35mm (1/4”) 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 in the ‘wiring up’ section,
although 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 High-pass Filter
Pressing this switch activates the high-pass lter. This reduces the level of bass
frequencies only. Use this in live PA situations to reduce stage rumble or ‘popping’
from mics.
4 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 6.35mm (1/4”) jack socket which is normally by-
passed. 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).
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.