26
SETUP
How to Adjust Speaker Levels
How to Adjust Speaker Levels
A properly setup Home Theater surround sound system
should have all loudspeaker levels adjusted to the same
starting reference volume level in the Listening/Viewing
area. This ensures that multi-channel sound tracks will be
reproduced with optimum realism. Individual channel lev-
els from an actual sound track usually change on a continu-
ous basis.
Note: Before performing the SPEAKER LEVEL adjustments,
you FIRST must have performed the SPEAKER SIZE
and TIME DELAY adjustments. You will be able to make
temporary level changes using the TRIM feature to
compensate for variations in program material. The
temporary changes will be erased, for certain Surround
Modes, when the MX132 is turned off.
The MX132 System Setup program includes a built-in test
signal generator, which can have its output switched into
each loudspeaker, either automatically or manually. The
starting test signal generator volume is set to the THX rec-
ommended level of 75dB sound pressure level. The desired
test signal volume levels of each loudspeaker can be deter-
mined, in the Listening/Viewing area, either by listening or
with a sound pressure meter. Level adjustments are made
in small steps (1 dB) by using the MX132 Remote Control
LEVEL pushbuttons. The level can be adjusted over a plus
or minus 12dB range.
Note: The MX132 also includes a Bass Limiter circuit, which
can be turned on to limit the maximum level of bass
energy fed to the subwoofer or any large full range
loudspeakers.
1. Press and hold the front panel Setup pushbutton ap-
proximately three seconds to enter the Setup Mode.
The SETUP pushbutton will illuminate, the word
SETUP will appear on the front panel display and the
MAIN SYSTEM SETUP MENU will appear on the
Monitor/TV screen. See Figure 6.
2. Press number 3 on the Remote Control to access the
SPEAKER LEVEL MENU, which will appear on the
Monitor/TV screen. See Figure 11.
Note: The very first time the SPEAKER LEVEL MENU is
accessed, the screen will indicate the factory default
settings.
3. Determine whether you wish to use the Automatic or
Manual loudspeaker Level switching mode. For Auto-
matic switching, proceed to Step 4. For manual switch-
ing proceed to Step 14.
Note: The front panel Output Format LEDs will light to
indicate which loudspeaker is receiving the test signal.
Refer to Figure 12.
Figure 12
Automatic Loudspeaker Level Switching
4. Press number 1 pushbutton on the Remote Control and
the screen will indicate AUTOMATIC (ON). The test
signal will start cycling continuously through all loud-
speakers in 2-second intervals. The Level number for
the specific loudspeaker being adjusted will blink on
and off.
5. While in the Listening/Viewing area, note the volume
levels from each of the loudspeakers as the test signal
switches. If you determine that the test signal volume
is louder or softer in any of the loudspeakers, the levels
should be adjusted so you hear the same test signal vol-
ume from all of the loudspeakers
Note: The Left Front Loudspeaker volume level can serve as a
reference. The THX recommended level is 75dB as
indicated on a sound pressure level meter.
6. Adjust the volume of the test signal by pressing a
LEVEL Up or Down pushbutton on the Remote Con-
trol. If an adjustment is made on
a loudspeaker, there is an addi-
tional 2-second time interval be-
fore the system switches to the
next loudspeaker. As a level is
changed, the on screen display
instantly indicates the level
change. If the level is increased
or decreased, the display will
indicate numbers or minus numbers.
7. As the test signal switches to succeeding loudspeakers,
repeat the level adjustment process until the test signal
volume levels of all the loudspeakers are the same. The
loudspeaker level cycling mode can be repeated as of-
ten as necessary.
Figure 11
MENU: SPEAKER LEVEL
(SELECT WITH NUMBER AND
ADJUST WITH LEVEL UP/DOWN)
1. AUTOMATIC (OFF)
2. MANUAL (OFF)
LEFT FRONT
0
CENTER
0
RIGHT FRONT
0
RIGHT SURROUND 0
LEFT SURROUND
0
SUBWOOFER
0
3. BASS LIMITER OR EXIT
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