McIntosh MHA150, Owner'S Manual

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Output Control
Rotate the OUTPUT Control to select the desired lis-
tening device, Headphones or Loudspeakers. Refer to
the OUTPUT CONTROL SELECTION chart below:
Notes: 1. For the best performance and safety, it is im-
portant to always match the impedance of the
Headphones and Loudspeakers to the MHA150
Output.
2. Do not exceed the maximum power handling
capacity of Headphones or Loudspeakers
connected to the MHA150.
3. The first time the OUTPUT Control is rotated,
the Front Panel Display will indicate the cur-
rent Output selection.
Profile Control
Rotate the PROFILE Control to select from up to 5
different Profile Settings for Headphone use. The
default Profile Setting is for the McIntosh MHP1000
To un-MUTE the Audio, press the MUTE Push-
button on the Remote Control, adjust the Volume level
or change Inputs.
Headphones Jack
Connect a pair of dynamic headphones to the Head-
phones Jack with a 1/4” (6.3mm) stereo phone type
plug for private listening.
Note: Use the OUTPUT Control to select the correct
impedance range.
Headphone HXD
®
The MHA150 Headphone Crossfeed Director
(HXD
® )
improves the sound localization for Head-
phone Listening. HXD
®
restores the directionality
component of the spatial sound stage normally heard
with Loudspeaker listening. To activate the HXD
®
when Headphones are connected to the Front Panel
Headphone Jack perform the following:
1. Momentarily press the Front Panel
VOLUME Control to enable the
HXD
®
Mode. The HXD
®
Icon located
above the Headphone Jack will illumi-
nate Green. Refer to figure 71.
2. To disable the HXD
®
Mode momen-
tarily press the Front Panel VOLUME
Control.
Note: HXD
®
Mode is automatically disabled when
SPEAKERS are selected with the OUTPUT
Control.
How to Operate the MHA150, con’t
Figure 71
HXD
®
is a registered trademark of McIntosh Laboratory, Inc.
Figure 70
UNBAL MUTE
Headphones. Refer to figure 72.
Profile Mode
Each profile setting stores the selected Headphone Im-
pedance Range, HXD Setting (On or Off), Bass Boost
Setting (0 to +12.5 dB) and assigns a custom name to
it. In the following example a second Profile will be
created, recalled, renamed and finally deleted using
the Profile Setup Mode:
PROFILE SETTINGS
1. Using the OUTPUT Control select, from the six
choices available, the correct impedance and power
output for the Headphones that will be used for
listening. Refer to the chart below.
OUTPUT CONTROL SELECTION
Listening
Device
Impedance in
Ohms (Ω)
Power Level Output Front Panel Display
Speakers 8 Ω --- 50 Watts
UNBAL 21%
SPEAKERS
Headphones 8 to 40 Ω Norm 250 milliwatts
UNBAL 21%
NORM 8O - 40O
Headphones 40 to 150 Ω Norm 250 milliwatts
UNBAL 21%
NORM 40O - 150O
Headphones 150 to 600 Ω Norm 250 milliwatts
UNBAL 21%
NORM 150O - 600O
Headphones 8 to 40 Ω High 1 Watt
UNBAL 21%
HIGH 8O - 40O
Headphones 40 to 150 Ω High 1 Watt
UNBAL 21%
HIGH 40O - 150O
Headphones 150 to 600 Ω High 1 Watt
UNBAL 21%
HIGH 150O - 600O
Figure 72
UNBAL 20%
MHP1000