Owner`s manual

19
Refer to figure 13.
2. Rotate the OUTPUT Control until the Front Panel
Display indicates “SPEAKER MODE, Large”.
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.
Refer to figure 15.
2. Rotate the OUTPUT Control until the Front
PanelDisplay indicates “SUBWOOFER MODE,
Enabled”. Refer to figure 16.
Note: When the MXA70 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
MXA70 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.
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 MXA70 allows for the connection of Loudspeak-
ers 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 MXA70 provides two different settings,
SMALL and LARGE. When using the MXA70
Loudspeakers, use the default setting of SMALL. The
LARGE listing refers to the Loudspeaker’s capability
for reproducing bass frequencies down to 35Hz within
-3dB of the midrange frequencies. If a Loudspeaker
can not reproduce bass frequencies down to 35Hz
within -3dB of the midrange frequencies, it is consid-
ered SMALL.
In the following example, the Speaker Size default set-
ting of SMALL will be changed to LARGE:
1. Press and hold the INPUT CONTROL until the
Front Panel Display indicates the Model, Firm-
ware Version and Serial Number. Refer to figure
2. Then rotate the INPUT CONTROL and select
the Setup Menu item “SPE A KER MODE , Small”.
Speaker Size
Figure 13
SPEAKER SIZE
Small
Fig ure 14
SPEAKER SIZE
Large
Subwoofer Mode
The MXA70 is designed to work with an external
Powered Subwoofer. The subwoofer would be used
when the Loudspeakers connected to MXA70 Output
Terminals do not have the ability to reproduce bass
frequencies down to 35Hz (within -3dB of the mid-
range frequencies).
The MXA70 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
Fig ure 16
SUBWOOFER MODE
Enabled
The MXA70 incorporates an Auto Off Feature, which
automatically places the preamplifier into the Power
Saving Standby/Off Mode. This occurs approximately
30 minutes after there has been an absence of audible
audio signals on the selected input (on either chan-
nel) 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