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How to Operate the MHA150, con't
UNBAL
Figure 70
To un-MUTE the Audio, press the
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.
®
HXD
is a registered trademark of McIntosh Laboratory, Inc.
24
Output Control
MUTE
Rotate the OUTPUT Control to select the desired lis-
tening device, Headphones or Loudspeakers. Refer to
the OUTPUT CONTROL SELECTION chart below:
MUTE Push-
Notes: 1. For the best performance and safety, it is im-
2. Do not exceed the maximum power handling
3. The first time the OUTPUT Control is rotated,
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
®
Listening
Device
Speakers
Headphones
Headphones
Figure 71
Headphones
Headphones
Headphones
Headphones
portant to always match the impedance of the
Headphones and Loudspeakers to the MHA150
Output.
capacity of Headphones or Loudspeakers
connected to the MHA150.
the Front Panel Display will indicate the cur-
rent Output selection.
OUTPUT CONTROL SELECTION
Impedance in
Power Level
Ohms (Ω)
8 Ω
8 to 40 Ω
40 to 150 Ω
150 to 600 Ω
8 to 40 Ω
40 to 150 Ω
150 to 600 Ω
Headphones. Refer to figure 72.
UNBAL
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
UNBAL
---
50 Watts
UNBAL
Norm
250 milliwatts
NORM 8O - 40O
UNBAL
Norm
250 milliwatts
NORM 40O - 150O
UNBAL
Norm
250 milliwatts
NORM 150O - 600O
UNBAL
High
1 Watt
HIGH 8O - 40O
UNBAL
High
1 Watt
HIGH 40O - 150O
UNBAL
High
1 Watt
HIGH 150O - 600O
20%
MHP1000
Figure 72
Front Panel Display
21%
SPEAKERS
21%
21%
21%
21%
21%
21%
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