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.
