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@ Phase Reverse switch
This switch reverses the phase of the XLR connectors. In the normal position (switch up), pin 2
is positive (hot), and pin 3 is negative (cold), and input and output signals are the same. Reverse
phase by depressing this button, making pin 2 negative (cold) and pin 3 positive (hot). Out-of-
phase signals are often caused
by differing wiring configurations in microphone or mixing
console cables, especially due to differing national standards.
@
PAD switch, GAIN control and PEAK LED
These offer complete control over the input sensitivity. The gain control continuously adjusts
the sensitivity. of the
transformerless
head
amplifier
between
—20
& —60
dB.
If this is.
insufficient, in the case of particularly high signal levels, depressing the pad switch will insert a
20dB attenuator before the head amplifier.
The red LED peak indicator lights whenever the post-EQ, pre-fader signal comes within 3dB of
clipping, warning the operator of impending channel overload. As a protective measure it is
advisable, when inserting a signal into a channel, to set the gain control to minimum, and
gradually raise the setting to the required level.
НІСН, MID FREQ/MID and LOW CONTROLS
These low-noise, low-distortion equalizers offer three bands of EQ, with +/—15 dB of gain, in
the following ranges:
HIGH:
10 kHz shelving type.
MID:
3 350 Hz — 5 kHz peaking type.
LOW:
100 Hz shelving type.
Response is flat in the center "0" position.
The variable frequency mid-range control is versatile enough to be used for feedback control.
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FREQUENCY
@ AUX 1 2 controls
These controls feed a post-EQ signal to the AUX 1 & 2 output busses. They may be used as
'send'' controls, to an effects unit or compressor; as outputs to a tape deck; or as extra monitor
outputs for the engineer, stage manager, etc.
NOTE: The AUX signal can be changed from pre-channel volume to post-channel volume by
changing an internal jumper.
(See the diagram on the right page.) This modification can be
made at any service center (see SERVICING section).
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