Monitor Speaker Calibration
The monitor calibration system enables the level of any loudspeaker connected to Duality SE to be trimmed by
±10db. Note that, with the monitor gain at maximum, a trim level of +10dB corresponds to unity gain through the
monitor section.
Do not attempt to carry out loudspeaker calibration unless you have access to accurately calibrated test
equipment.
Selecting CAL in the first layer of MONITOR OPTIONS produces the following options:
Turn on the console oscillator (OSC ON) and select the PINK ON button; the default level for the console’s pink
noise output is +4dBu RMS. Adjust using the Pink trim pot in the oscillator section if necessary.
Set the monitor level control to the position you wish to correspond to the calibrated level. A level setting of 8.5
will provide 10dB of additional gain in hand.
Now select the required monitor system — Main 5.1, ALT 5.1, MINI A or MINI B.
Select the CAL menu. Pressing either AL or AR or AC will send pink noise to the Left or Right or Centre
loudspeakers respectively Adjust the level for the required SPL (eg. 85dBa C weighting, slow response, on a suitably
calibrated dB meter), by turning the main monitor pot left or right from its initial position.
Now work through the rest of the speakers (see below), checking before you calibrate the LFE output whether the
LFO option (see previous page) is off or on.
See Monitor Level Display and Calibrated listening level for information regarding the
85dB button.
22--2299
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