The Mcintosh C39 has a convenient built-in Noise generator to allow trimming volume levels
for each of the six channels. This process is described as Surround Sound Calibration. These
selected volume levels are then retained in the C39 Control Center memory.
MANUAL CHANNEL CYCLING FOR CINEMA 1 DOLBY PRO LOGIC SURROUND SOUND
LEVEL CALIBRATION
1. Set the MODE Switch to CINEMA 1.
2. Set the C39 VOLUME control to a level between 30% ± 10%.
3. Set the rear panel SURROUND CALIBRATE Switch to MANUAL.
Press the SYS CAL, (SUR CAL),surround level calibration pushbutton. This starts the built-
in noise generator and feeds it first to the LEFT FRONT channel to begin the level calibration
process. Each further press of the SYS CAL, (SUR CAL) pushbutton feeds the noise generator
signal to the other five channels in the following order: CENTER, RIGHT FRONT, RIGHT SUR-
ROUND, LEFT SURROUND and finally the SUBWOOFER.
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.
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 the last channel, the Subwoofer, has been calibrated, press the SYS CAL, (SUR
CAL), pushbutton again to exit the calibration mode.
You can also exit or cancel the manual calibration mode at any time by adjusting
the front panel VOLUME control or pushing one of the remote controller VOLUME
pushbuttons.
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.
(For future reference, list the final calibration trim numbers in the space provided in this
manual. If the C39 AC power cord is disconnected from the AC power line, or AC power is
interrupted, the backup power supply will turn off and calibration memory will be lost. The
calibration process must then be repeated.)
AUTOMATIC CHANNEL CYCLING FOR CINEMA 1 DOLBY PRO LOGIC
SURROUND SOUND LEVEL CALIBRATION
1. Set the MODE Switch to CINEMA 1.
2. Set the C39 VOLUME control to a level between 30% ± 10%.
3. Set the rear panel SURROUND CALIBRATE Switch to AUTO.
4. Press the SYS CAL, (SUR CAL), Surround level calibration pushbutton to start the automatic
channel cycling calibration process. The built-in noise generator turns on and automatically
feeds a signal for two seconds, to all six channels in the following order: LEFT FRONT, CENTER,
RIGHT FRONT, RIGHT SURROUND, LEFT SURROUND and SUBWOOFER.
When either the UP ( ') or DOWN ( ) SURR LEVEL, (SUR CAL) pushbutton is pressed dur-
ing Automatic calibration, the channel switching function will temporarily stop to allow the
level to be adjusted. One second after an UP ( ) or DOWN ( ) SURR LEVEL, (SUR CAL)
pushbutton has been pressed and then released, the automatic calibration switching will
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MclNTOSH
HOME THEATER
SURROUND
SOUND
VOLUME LEVEL
CALIBRATION
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