continue to the next channel.
Adjust the levels of each of the six individual channels with the front panel UP ( ) or DOWN
( ) SURR LEVEL, (SUR CAL) pushbuttons until you achieve the level match you prefer in the
listening area. It is recommended that all channel volume levels be as close to the same
as possible.
A convenient method for surround volume level calibration in the Automatic mode,
is to use the UP ( ) and DOWN ( ) SURROUND pushbuttons on the C39 Hand Held
Remote Controller and operate it from a position located in the listening area at seated
ear height. First press the SYS CAL, (SUR CAL) pushbutton on the C39 front panel
to start the automatic channel cycling process.
Any changes made in channel calibration levels will be read as a TRIM number on the
front panel % VOLUME indicator. Trim numbers will indicate + (Plus) or - (Minus) from 0
to 19. You may repeat the calibration process as many times as desired until you are satisfied
with the results.
After all six channels have been calibrated, exit the automatic calibration mode by
momentarily pressing either an UP ( ) or DOWN ( ) VOLUME pushbutton on the hand
held Remote Controller, or by moving the front panel VOLUME control.
If the front panel VOLUME control is adjusted, or the remote controller VOLUME
pushbuttons are pushed at any time during the calibration procedure, the calibration
function will be canceled.
The dimensions and shape of the listening room can affect bass frequencies that are
reproduced by a subwoofer. You may have to experiment with different locations for the sub-
woofer until you find one that works best in your room.
CINEMA 2 HOME THX AUDIO SURROUND SOUND LEVEL CALIBRATION
INTRODUCTION
The design of Home THX Audio amplifiers, preamplifiers and decoders includes careful
control of the signal gains of each of the many circuits involved. Loudspeaker sensitivities,
room size and listening distance will all contribute to the overall playback levels that are cor-
rect for the Home THX Audio process.
The built-in noise generator in the C39 allows trimming volume levels to the desired Home
THX Audio requirements for each of the six channels. This process is described as Surround
Sound Calibration. These selected volume levels are then retained in the Control Center
memory.
After THX calibration is completed, your system, including a Home THX Audio licensed
Mcintosh MC7106 power amplifier and HT Series loudspeakers, will reproduce movie sound-
tracks from laser video discs at the same levels as heard by the movie producer who mixed
the original sound tracks. Video tape audio levels may vary from those of laser video discs.
You of course may change the overall volume levels to any settings you personally prefer.
However, it is nice to know by using a Home THX Audio Mcintosh Home Theater System,
you can precisely duplicate the original sound levels specified by the people who produced
the movie.
You can use other Mcintosh power amplifiers that do not have an indicated Home THX
Audio sensitivity setting, but you may have to make adjustments of the volume levels on the
power amplifiers to achieve the desired results.
26
MclNTOSH
HOME THEATER
SURROUND
SOUND
VOLUME LEVEL
CALIBRATION
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