Mono Input Channels - SoundCraft MH2 User Manual

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Mono Input Channels

Pre-Amp
The module's pre-amp features a high headroom and outstanding CMRR performance. The
XLR input can handle signals up to +26dBu, with a gain range of +15dBu to +60dBu (1) and a
20dB pad switch (2). A Peak LED (3) indicates internal signal levels in excess of +18dBu. This
monitors both the pre-amp output and the EQ section output. Polarity Reverse (4) and Phantom
Power switching (5) is provided. The Line Input switch (6) allows the XLR input signal to be
replaced by a different high-level input signal, connected via the balanced 1/4" Line Input jack
on the rear panel. The sensitivity of the line input is the same as the XLR input when the Pad is
switched in (the Pad does not affect the Line Input).
Balanced Insert Point
Separate jacks provide a pre-EQ balanced send and return, at a nominal level of 0dBu. See the
rear panel connectors.
EQ and HI-PASS Filter
This new design retains the traditional Soundcraft response, but incorporates steeper slopes on
the HF stage focussing the control where you want it, and some carefully tailored overshoot on
the LF band, which automatically controls the muddy lower-mid frequencies when boosting lows.
The high-pass filter (7) is variable from 30Hz - 400Hz with bypass (8) if required. The EQ section
may be bypassed by releasing the EQ switch (9).
The EQ section is four band, with shelving sweep high and low frequency sections, and sweepable
high-mid and low-mid bands. The frequency ranges are 30Hz-500Hz (LF)(10), 75Hz-1.3kHz
(Low Mid)(11), 750Hz-13kHz (High Mid)(12), and 1.2kHz-20kHz (HF)(13), with +/-15dB of cut
or boost available at any frequency. The Q on the two mid bands is fixed at 1.5.
Aux Sends
There are 10 Aux sends (14), which can be used either as FX sends in FOH use, or monitor
mixes for monitoring. Aux 9 & 10 can be switched to a stereo pair for an in-ear send, using the
adjacent STE switch (15). Each send has 5dB of gain at maximum.
The Auxes can be switched Pre- or Post-fader by the adjacent PRE switches (16), which are in
pairs for the first 4 sends and Aux 9 & 10, and as one group for Aux 5-8. The default Pre-fade
signal for all Auxes is post-EQ but can be changed to pre-EQ by pressing the AUX PREQ switch
(17) (both feeds follow the channel mute).
Subgroup Routing
In addition to the 10 Aux sends, 8 busses are provided for conventional subgrouping. Routing to
these is via 4 paired routing switches (18). The balance between odd and even group busses is
controlled by the chanel PAN control.
Direct Output
A direct output on balanced 1/4" jack is available from the channel, see the rear connector
panel. The source is controlled by the DIR PST switch (19), which switches the direct output
from pre-EQ to post-EQ when the switch is pressed in. In addition, there are internal solder links
to alter the signal feeds in both of the switch positions, as follows:
Either: UP= non-muted pre-fade, DOWN= Post fade,
Or: UP= non-muted Pre-filter, DOWN= Post-EQ. (default setting).