Stereo Input Channels - SoundCraft MH2 User Manual

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Stereo Input Channels

Four stereo input channels are fitted as standard to all MH2 frame sizes.
Input stage
A stereo version of the Mono input's high performance pre-amp offers the same gain range of
+15dBu to +60dBu (1) and a 20dB PAD switch (2). It also has Phantom Power switching (3), and
polarity reverse on the left channel (4). The peak LED (5) indicates signals in excess of +18dBu
on either left or right channels, while two MONO switches (6) cut either Left or Right channel,
feeding the alternate channel to both module paths, or if both are pressed, a mono sum of L and
R to the module paths. A separate Line Input signal can be connected to the 1/4" Line Input jacks
on the rear panel, and switched in to replace the XLR signals, by pressing the LINE switch (7).
Balanced Insert Points with INS switch
Separate jacks provide a pre-EQ balanced send and return, for Left and Right channels, at a
nominal level of 0dBu. See the rear connector panel.
EQ and HI-PASS Filter
The EQ section is stereo four band, with fixed frequencies on all bands and is enabled by pressing
the EQ switch (8). The HF and LF bands have a shelving response, whilst the Mid bands have
a peak/dip response.
The frequencies are 80Hz (LF)(9), 450Hz (Low Mid)(10), 2.5kHz (High Mid)(11), and 12kHz
(HF)(12), with +/-15dB of cut or boost available. The Q is fixed on the mid bands at 1.3.
The stereo High-pass filter is fixed at 80Hz, and is switched in with the High-pass switch (13).
Aux Sends
As on the mono input there are 10 sends (14), for FX or Monitor use.
Aux 9 & 10 can be switched to a stereo pair for an in-ear send, using the adjacent STE switch
(15). In this case, the A9 knob becomes a stereo Level control, and the A10 knob becomes the
PAN between Aux 9 and Aux 10.
Each send has 5dB of gain at maximum, and is always fed from a mono sum of the left and right
signals. ( If Aux 9 & 10 are switched to stereo, these sends are fed with a stereo signal, left to
Aux 9 and right to Aux 10.)
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 Pre-fade signal for
all Auxes is always post-EQ.
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 (17). Odd numbered busses are fed by the left
channel, even from the right.
Mix Bus Routing and Balance controls
The signal is sent to the stereo mix bus and the mono bus using the MIX (18) and C (19) switches.
The BAL (20) control allows the left signal to be faded down to zero level when turned fully
clockwise, and vice-versa for the right signal. In the centre position, both channels are fed at
unity gain to the Mix bus. The balance control also affects the L-R balance within the mono sum
sent to the Aux sends (pre or post fade) and the L-R balance between odd and even group
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