McIntosh MX130 Owner's Manual page 32

MclNTOSH
HOME THEATER
Audio sensitivity setting, but you may have to adjust the volume levels on the power amplifiers
SURROUND
SOUND
LEVEL
positioned in the listening area at seated ear height. The meter is necessary to set
CALIBRATION
2. Set the MODE Switch to CINEMA 2.
3. Adjust the MX130 Volume control until the front panel Volume Level Indicator reads
"44". This is the recommended Home THX Audio starting reference volume setting.
This volume setting produces the required audio output when connected to a Home THX Audio
licensed Mclntosh MC7106 power amplifier driving Mclntosh HT Series loudspeakers.
4. Set the rear panel SURROUND CALIBRATE switch to MANUAL.
5. Place the sound level meter in the primary listening area. Set the meter for flat response
or C weighting, slow mode if available, and to an appropriate range for reading a sound pressure
level of 75dB.
6. Press the SYS CAL Surround calibration pushbutton. This activates the built-in noise
generator and feeds it first to the LEFT FRONT channel to start the level calibration process.
Each further press of the SYS CAL pushbutton feeds the noise generator signal to the other
five channels in the following order: CENTER, RIGHT FRONT, RIGHT SURROUND, LEFT SUR-
ROUND and finally the SUBWOOFER.
( ) SURR LEVEL pushbutton until the sound level meter reads as close as possible to 75dB
in the listening area.
front panel % VOLUME indicator. Trim numbers will indicate + (Plus) or - (Minus) from 0
to 19. You may repeat the calibration process as often as desired until you are satisfied with
the results.
manual. If the MX130 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.)
pushbutton again to exit the calibration mode.
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 repro-
duced by a subwoofer. You may have to experiment with different locations for the subwoofer
until you find one that works best in your room.
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precisely duplicate the original sound levels specified by the people who produced the movie.
You can use other Mclntosh power amplifiers that do not have an indicated Home THX
to achieve the desired results.
Accurate THX Volume calibration requires the use of a calibrated sound level meter
the acoustic sound levels from each loudspeaker to 75dB as specified by the Hone
THX Audio standards.
MANUAL CHANNEL CYCLING FOR CINEMA 2 HOME THX AUDIO SURROUND LEVEL
CALIBRATION
1. Set the MX130 LISTEN Selector switch to the LV (Laser Video Disc Player) position.
Adjust the levels of each of the six individual channels with the front panel UP ( ) or DOWN
Any changes made in channel calibration levels will be read as a TRIM number on the
(For future reference, list the final calibration trim numbers in the space provided in this
After the last channel, the Subwoofer, has been calibrated, press the SYS CAL,
You can also exit or cancel the calibration mode at any time by adjusting the front