SoundCraft SM12 User Manual page 21

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3
12
18
1
4
Input
5
1
The sensitivity of both the XLR and the HIGH IMPEDANCE (HI-Z jack) inputs
is adjusted by the SENS control. Both inputs are electronically balanced.
2
The +48V switch, when depressed, applies +48V phantom power to the input
XLR for powering condenser microphones.
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3
The PHASE switch reverses the phase of the selected input.
4
The RNGE (Range) switch selects between an input range of -2dBu to -70dBu
and +10dBu to -20dBu to allow line level signals to be used when the switch is
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pressed. The signal is still taken from the input XLR, unless a jack is inserted into
the HI-Z input socket, when the signal from that is used instead.
Note that when the RNGE switch is released the HI-Z input socket cannot be used,
and that phantom power is not applied to the Hi-Z jack.
5
Pressing the FILTER switch activates a pre-insert high-pass filter section.
Frequency Response Curves of the High-Pass Filter
Highpass Filter
dB
10.0
5.0
8
0.0
-5.0
-10.0
-15.0
-20.0
-25.0
-30.0
10
Equaliser
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10
This section is a four band, peaking sweep EQ.
6
The HF section has a maximum cut or boost of 15dB and the frequency is
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variable between 1kHz and 20kHz, with a Q of 1.3.
The HMF (High Mid) section has a maximum cut or boost of 15dB and the
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frequency is variable between 450Hz and 12kHz, with a Q of 1.3.
The LMF (Low Mid) section has a maximum cut or boost of 15dB and the frequency
is variable between 60Hz and 1k5Hz, with a Q of 1.3.
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The LF section has a maximum cut or boost of 15dB and the frequency is variable
between 12Hz and 350Hz, with a Q of 1.3.
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The EQ section is switched in when the EQ switch is depressed.
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100
1k
Frequency/Hz
10k
Input Module