Union Audio Orbit.6, User Manual

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13
The Master sections sums the audio from the six Channels and controls the output signal
level feeding the main sound system.
This section features a Master Output Level control, a three - Band Isolator EQ and a pair
of Analogue VU Meters for monitoring the left and right mix buss signal levels.
Additional signal processing can be applied by making use of the Master Insert sockets
located on the rear panel. These sockets break the mix signal path, enabling external
audio processors to be
“ inserted ” into the signal chain and on to the mixer outputs.
Master Level – The Master Output level is adjusted from fully off to +6dBu gain. For best
signal to noise ratio (SNR) it is recommended operating the mixer with the knob pointer
at
“12 o - clock ” or above. If this results in excessive volume then reduce the gain on the
connected power amplifiers
Isolator – The asymmetric Isolator offers full signal cut and +6dB of boost over three
frequency bands, High, Mid, Low. Like an EQ the Isolator can be used for audio frequency
correction, however, unlike an EQ the Isolator completely attenuates the signal when
the knobs are fully anti
- clockwise. With the knob pointers in the centre position the
frequency response is flat.
Output Meters– The large analogue VU Meters allow for easy monitoring of the left/
right main Mix Buss signal level. The signal level is monitored post - Isolator but pre -
Master Level control. The meter response is the VU (Volume Unit) standard and displays
the average signal level, unlike the channel LED meters which are peak reading. Both
meters feature soft ultra violet illumination providing a cool blue/white glow for easy
monitoring in low light conditions, without being overly bright or distracting.
For lowest distortion and best dynamic range, operate the mixer with the meters reading
between –
5 VU and 0VU, with signal peaks no higher than +1VU. If the mix buss signal
level goes above +3VU the meter illumination will flash bright red as a warning.
Master Section