MASTER SECTION
AUX 1 PRE
The input channels provide both Pre- and Post-Fade AUX 1 sends which may be selected desk-wide on the Master Section.
Press the AUX 1 PRE switch to make all of the AUX 1 Sends on the channel strips PRE-FADE. This means that they will
all be unaffected by the position of the channel faders, making them ideal for FOLDBACK or MONITORING. Since this
button affects all the channels on the mixer, its importance is highlighted by a different cap colour.
When the switch is released the AUX 1 Sends are all POST-FADE, and will fade up and down with the channel faders.
This is more suitable for effects sends which need to fade out with the associated source.
AUX 1 AFL (AFTER FADE LISTEN)
Just like the PFL switches on the channels, you can monitor the AUX 1 output by pressing the AFL switch. This routes the
AUX 1 output signal to the MONITOR or PHONES, replacing any existing signal (normally the Monitor receives either
MIX or the Tape Return, depending on the position of the MIX switch - see below). The RIGHT METER also switches from
the selected source to display the PFL/AFL signal and the PFL/AFL LED lights to warn that a PFL or AFL switch is pressed.
When you let go of the switch the Monitor returns to the previous source.
AUX 2 AFL
This works just the same as AUX 1 AFL.
BARGRAPH METERS
The three colour BARGRAPH METERS have a PEAK response and normally follow the Monitor selection to show the level
of the MIX RIGHT and MIX LEFT outputs, giving you a constant warning of excessive peaks in the signal which might
cause overloading. The fast attack of the meters means that a signal with high level transients (e.g. kick drum) will tend
to give a higher reading than a less dynamic signal (e.g. a synth) at the same level. You should therefore aim for an
average reading of +6/+9 if the mix contains a high proportion of high level transients and a lower reading of around
0 for steadier signals with the Master Faders at about the 0 mark.
If the output level is too low and hardly registering at all on the meters, the level of background noise may become
significant. In this case check that input levels and gain settings are correct (see the section -- Initial Setting Up)
OSCILLATOR TO MIX
A built-in 1kHz OSCILLATOR provides a test tone for system tests or aligning Tape Machines. Press the switch to turn
ON the oscillator and feed the tone to the MIX outputs at a fixed level and frequency. DONT DO THIS DURING A LIVE
PERFORMANCE, OR WITH THE AMPLIFIERS TURNED UP HIGH - a sudden, very loud burst of tone will not do your
ears or your loudspeakers any good! Since this button must therefore only be used with caution, its importance is
highlighted by a different cap colour.
PHANTOM POWER
Many professional condenser mics need PHANTOM POWER, which is a method of sending a powering voltage down
the same wires as the mic signal. Press the switch to enable the +48V power to all of the MIC inputs. DO NOT turn on
the phantom power when using unbalanced mics which may be damaged by the voltage applied to pin 2 & 3 of the mic
input XLR.
Note: Mics should always be plugged in before switching the Phantom Power ON.
MASTER FADERS
The MASTER FADERS set the final level of the MIX outputs, and separate faders are provided for LEFT and RIGHT. These
should normally be set close to the 0 mark if the input GAIN settings have been correctly set, to give maximum travel
on the faders for smoothest control. If, even with correct input settings, you find that you are working with the master
faders very low, then turn your power amplifiers down so that you can bring the fader level back to normal.
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SPIRIT FOLIO
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