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MC-12 Setup
3-33
CALIBRATING SPEAKER DISTANCES & OUTPUT LEVELS
The MC-12 offers both automatic and manual calibration of speaker distances and output levels. Calibration helps to ensure accurate output
signal arrival time and level at the primary listening position. However, it is not a substitute for proper speaker placement.
Before calibrating speaker distances and output levels:
• Set crossover points for the Main Zone audio output connec-
tors. Setting crossover points afterwards could invalidate
calibrated output levels. (The CUSTOM or THX SETUP menu
can be used to set crossover points.)
• Eliminate extraneous noise in the listening space, including
conversation, air conditioners, and sounds that filter in through
open doors and windows.
• Move or remove objects – including people – blocking the
line-of-sight path between the microphones or SPL meter and the
speakers.
SPEAKER CALIBRATION PARAMETERS
The table on the next page indicates the speaker calibration param-
eters that can be used to set speaker distances and output levels for
the speakers connected to the corresponding Main Zone audio
output connectors. These parameters are available on the speaker
distance and output level menus shown throughout this section. All
parameters perform the same function whether automatic or
manual calibration is selected.
SPEAKER DISTANCE PARAMETERS +0.0 to 30.0ft or 12.0m
Determine the distance between the primary listening position and
the speaker connected to the corresponding Main Zone audio
output connector.
OUTPUT LEVEL PARAMETERS -18.0db to +12.0dB
Determine the output level of signals sent to the speaker connected
to the corresponding Main Zone audio output connector.