Power Output Meters And Power Guard; Using A Separate Power Amplifier - McIntosh MHA150 Owner's Manual

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How to Operate the MHA150, con't
Profile Mode, con't
14. To store the renamed Profile into memory press
and hold in the VOLUME CONTROL until the
Front Panel Display indicates "SAVE PROFILE,
Profile Saved". Refer to figure 89.
SAVE PROFILE
Profile Saved
Figure 89
15. To exit the Profile Rename Mode momentarily
press the VOLUME Control.
DELETING PROFILES
There are two ways to Delete Profiles, delete one
saved Profile or delete all saved Profile Names. In the
first example, one Profile will be deleted. Perform the
following steps:
16. Using the PROFILE Control, select the Profile to
be deleted. Refer to figure 90.
UNBAL
MHP1000
Figure 90
17. Rotate the VOLUME Control to select "DELETE
PROFILE, MHP1000". Refer to figure 91.
DELETE PROFILE
MHP1000
Figure 91
18. Press and hold in the VOLUME Control until the
Front Panel Display indicates "DELETE PRO-
FILE, Profile Deleted". Refer to figure 92.
DELETE PROFILE
Profile
Deleted
Figure 92
19. To exit the Profile Delete Mode momentarily
press the VOLUME Control.
26
To Delete All the stored Profiles, perform the follow-
ing steps:
20. Using the PROFILE Control, select one of the
available Profiles. Refer to figure 93.
21. Rotate the VOLUME Control to select "DELETE
ALL, Saved Profiles". Refer to figure 94.
22. Press and hold in the VOLUME CONTROL until
the Front Panel Display indicates "DELETE ALL,
All Deleted". Refer to figure 95.
20%
23. To exit the Profile Delete Mode momentarily
press the VOLUME Control.
Power Output Meters
The MHA150 Power Output Meters indicate the
power delivered to the Headphones or Loudspeak-
ers. Refer to figure 100. The meters respond to all the
UNBAL
20%
Y10-PRO
Figure 93
DELETE ALL
Saved Profiles
Figure 94
DELETE ALL
All
Deleted
Figure 95
Figure 100
musical information being produced by the Amplifier.
They indicate to an accuracy of at least 95% of the
power output with only a single cycle of a 2,000Hz
tone burst.
Power Guard
During normal operation, the Front Panel Power
Guard Indicators will momentarily illuminate during
peaks in the audio signals. In the event the MHA150
over heats, due to improper ventilation, high ambient
temperature and/or impedance mismatch, the inter-
nal protection circuits will activate. The Front Panel
Power Guard Indicators will continuously illuminate
and the audio will be muted. When the MHA150 has
returned to a safe operating temperature, normal op-
eration will resume.
Using a Separate Power Amplifier or Subwoofer
To use a separate Amplifier instead of the MHA150
built-in Power Amplifier, connect the Loudspeak-
ers to the separate Power Amplifier. Refer to page 13
"External Power Amplifier Connections" for addition
connection information. An external
Powered Subwoofer may also be used
with the MHA150. Refer to page 19
"Subwoofer Mode" for additional infor-
mation.
When either an External Power Ampli-
fier or Powered Subwoofer is used with
the MHA150 the Rear Panel PREAMP
OUTPUT Jacks are used. Refer to figure 101.
System Thru Operation
When the MHA150 is connected to a Main Pream-
plifier or Audio/Video Controller (as illustrated on
page 12) it is important to maximize the combined
Figure 101

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