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STEREO INPUT CHANNELs 11-14
These inputs accept 3-pole A gauge (TRS) jacks. Use these inputs for sources such as
keyboards, drum machines, synths, tape machines or as returns from processing units.
The inputs are BALANCED for low noise and immunity from interference, but you can
use UNBALANCED sources by wiring up the jacks as shown in the "CONNECTIONS"
section earlier in this manual, although you should then keep cable lengths as short as
possible to minimise interference pick-up.
If you wish to use the channel with a mono source, plugging into the Left jack
automatically feeds the source to both sides of the channel.
1 INPUT +4/-10
Most professional equipment uses input and output levels of +4dBu, but
semi-professional tape machines or hi-fi systems use a lower level of -10dBV. This switch
allows you to match the sources connected to the Stereo input jacks to either standard,
which is important to ensure the best possible sound quality. If you are not sure which
input level is appropriate, start with the switch UP to select +4dBu. If you are unable
to achieve an adequate signal level (even with the fader at maximium), press the switch
in for -10dBV.
2 EQUALISATION
HF EQ
Turn to the right to boost high (treble) frequencies, adding crispness to percussion from
drum machines, synths and electronic instruments. Turn to the left to cut these
frequencies, reducing hiss or excessive brilliance. Set the knob in the centre-detented
position when not required. The control has a shelving response giving 12dB of boost
or cut at a fixed frequency of 12kHz.
LF EQ
Turn to the right to boost low (bass) frequencies, adding extra punch to synths, guitars
and drums. Turn to the left to reduce hum, boominess or improve a mushy sound. Set
the knob to the centre-detented position when not required. The control has a shelving
response giving 12dB of boost or cut at a fixed frequency of 60Hz.
3 AUX SENDS
These controls route a mono sum of the channel signal to any one or more of six Auxiliary
which are used to set up separate mixes for FOLDBACK, EFFECTS or recording, and
the combination of all the Aux Sends is mixed to the corresponding Aux Output at the
rear of the mixer. The controls are specially chosen to give a particularly smooth control
range at the lower end of the scale where it is most needed - quite unique on a mixer
of this type.
Aux 1 is always PRE-FADE which is ideal for Foldback or Monitor feeds where the send
needs to be independent of the fader so that, for instance, the mix to artists headphones
is not affected by changes in fader level.
Aux 3 and 4 are always POST-FADE, ideal for Effects where it is useful for the Aux Send
to fade up and down with the fader. For flexibility, the Master Section AUX2 PRE switch
allows you to switch AUX 2 from pre- to post-fade across the whole mixer as required.
Aux 5 & 6 are identical to Aux 3 & 4 and may be selected as an alternative by pressing
the 5-6 switch.
Leave all of the knobs turned fully left when not in use.
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SPIRIT FOLIO RAC PAC