Owner`s manual

19
Refer to figure 15.
2. Rotate the OUTPUT Control until the Front
PanelDisplay indicates “SUBWOOFER MODE,
Enabled”. Refer to figure 16.
Note: When the MHA100 Subwoofer Mode is set
to “ENABLED” it is important the Powered
Subwoofer internal crossover frequency be set
to 80Hz. It is recommended the Professionals
at your McIntosh Dealer, who are skilled in all
aspects of room acoustics be involved when the
MHA100 is used with a Powered Subwoofer
and any associated audio equipment.
3. To exit from the Setup Mode, press the INPUT
CONTROL and the Front Panel Display will revert
back to its normal display.
2. Rotate the OUTPUT Control until the Front Panel
Display indicates “SPEAKER MODE, Small”.
Refer to figure 14.
3. To exit from the Setup Mode, press the INPUT
CONTROL and the Front Panel Display will revert
back to its normal display.
Record any changes made to the various default Input
Names in the following chart for future reference.
8. To exit from the Setup Mode, press the INPUT
CONTROL and the Front Panel Display will revert
back to its normal display.
Input Renaming
Default Input Name New Input Name
UNBAL
BALANCED
OPTICAL
COAX
AES/EBU
USB
Setup, con’t
The MHA100 allows for the connection of Loud-
speakers with different performance capabilities. One
of the difference in Loudspeaker performance is the
ability to reproduce bass frequencies down to 35Hz
within -3dB of the midrange frequencies.
The MHA100 provides two different settings,
LARGE and SMALL. The LARGE listing refers to
the Loudspeaker’s capability for reproducing bass fre-
quencies down to 35Hz within -3dB of the midrange
frequencies. If a Loudspeaker can not reproduce bass
frequencies down to 35Hz within -3dB of the mid-
range frequencies, it is considered SMALL.
In the following example, the Speaker Size default set-
ting of LARGE will be changed to SMALL:
1. Press and hold the INPUT CONTROL until the
Front Panel Display indicates the Model, Firmware
Version and Serial Number. Refer to figure 2. Then
rotate the INPUT CONTROL and select the Setup
Menu item “SPEAKER MODE, Large”. Refer to
figure 13.
Speaker Size
Figure 14
SPEAKER SIZE
Small
Figure 13
SPEAKER SIZE
Large
Subwoofer Mode
The MHA100 is designed to work with an external
Powered Subwoofer. The subwoofer would be used
when the Loudspeakers connected to MHA100 Output
Terminals do not have the ability to reproduce bass
frequencies down to 35Hz (within -3dB of the mid-
range frequencies).
The MHA100 provides two different Subwoofer
Mode settings, “Disabled” and “Enabled”. The Default
Setting of “Disabled” provides a Stereo Signal at the
PREAMPlifier OUPUT Jacks. When the setting is
chanaged to “Enabled” the Left and Right channel
signals are combined into a monaural signal available
at both PREAMP OUPUT Jacks. In the following
example, the Subwoofer Mode default setting of DIS-
ABLED will be changed to Enable:
1. Press and hold the INPUT CONTROL until the
Front Panel Display indicates the Model, Firmware
Version and Serial Number. Refer to figure 2. Then
rotate the INPUT CONTROL and select the Setup
Menu item “SUBWOOFER MODE, Disabled”.
Figure 15
SUBWOOFER MODE
Disabled
Figure 16
SUBWOOFER MODE
Enabled
The MHA100 incorporates an Auto Off Feature,
which automatically places the preamplifier into the
Power Saving Standby/Off Mode. This occurs approx-
imately 30 minutes after there has been an absence of
audible audio signals on the selected input (on either
channel) or user activity (includes changes to any
of the Operation Functions such as source selection,
volume adjustment, etc). If it is desirable to disable the
Auto Off Feature perform the following steps:
1. Press and hold the INPUT CONTROL until the
Front Panel Display indicates the Setup Mode is
Power Mode