Solid State Logic Duality 82S6DUA20C - Manual (Page 39)

Monitor Level Calibration
The monitor calibration system enables the level of any loudspeaker connected to Duality 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.
NEXT – selecting this in the first layer produces a second layer of calibration options:
Selecting ALS or ARS or ALF allows you to trim the Left Surround, Right Surround or LFE channels
respectively by ±10db, using the method described above.
ALS ARS ALF LFG BMN RTRN
EXTA EXTB METERS
AFL/
PFL
MONITOR
OPTIONS
MISC
AL AR AC NEXT
EXTA EXTB METERS
AFL/
PFL
MONITOR
OPTIONS
MISC
Monitor Calibration
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