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Display returns to indicate the Source Selection and
Volume Level.
HEADPHONE HXD SELECTION
The C1100 Internal Headphone Amplifier incorpo-
rates McIntosh HXD Circuitry bringing acoustical
depth and spatiality of music normally heard with
loudspeakers, to your headphones. It can be switched
On or Off as follows:
1. Select the "HEADPHONE HXD, ___" TRIM
FUNCTION. Refer to figures 81 and 82.
HEADPHONE HXD
Off
Figure 81
HEADPHONE HXD
On
Figure 82
2. Select either ON or OFF.
HEADPHONE GAIN SELECTION
The C1100 Internal Headphone Amplifier Circuitry
also incorporates three available Ranges of Ampli-
fier Gain, to more closely match the impedance Ω
(ohms) of the connected Headphones (16Ω ‑ 40Ω,
40Ω ‑ 150Ω, 150Ω ‑ 600Ω), for the best performace.
To select one of the three available ranges perform the
following:
1. Select the "HEADPHONE GAIN, 40Ω ‑ 150Ω",
default setting. Refer to figure 83.
HEADPHONE GAIN
40O - 150O
Figure 83
2. If the impedance of the connected Headphones
doesn't match within the current setting, select one
of the other choices. Refer to figures 84 and 85.
HEADPHONE GAIN
16O - 40O
Figure 84
HEADPHONE GAIN
150O - 600O
Figure 85
Mute
Press the MUTE Push-button, on the C1100 Front
Panel or on the Remote Control, to Mute the Audio
in all outputs (Main, Output 1, Output 2 and Head-
phones) except the FIXED OUTPUT. The Front Panel
Information Display will indicate the Source Name
and the word MUTE in place of the actual volume set-
ting. Refer to figure 86.
INPUT: BAL 1
MUTE
Figure 86
Pressing the Mute Push-button a second time or
adjusting the volume control (either the Front Panel or
Remote Control) will unmute the C1100.
Trim
Momentarily press the Front Panel INPUT Control to
activate the C1100 Trim Functions. Rotate the INPUT
Control to select the desired Trim Function and then
use the VOLUME (adjust) Control to change the Trim
setting. Refer to figures 60 and 63 on page 26. The
Remote Control TRIM and LEVEL UP / DOWN-
Push-buttons may also be used. Approximately 10
How to Operate the C1100, con't
seconds after Trim Function Selection and/or adjust-
ments have stopped, the C1100 will switch the Trim
Mode Off.
Adjust
The Front Panel ADJUST Control is used to make
changes to the currently selected TRIM FUNCTION.
HXD
Press the the Front Panel HXD Push-button to activate
or de-activate the HXD Circuitry. Refer to "HEAD-
PHONE HXD SELECTION" elsewhere on this page-
for additional information.
Output Meters
The C1100 Output Meters indicate the Output Level in
Decibels (dB) available at the MAIN, OUTPUT 1 and
OUTPUT 2 Connectors/Jacks to drive Power Ampli-
fiers. Refer to figure 87. The Meters are calibrated in
dB (decibels) and respond to all the peaks contained
in the musical information. A meter reading of 0dB
indicates the C1100 is delivering its rated output.
Figure 87
Passthru
The C1100 will automatically turn On and switch to
the previously setup Passthru Input when the McIn-
tosh A/V Processor or Multichannel Surround Decod-
er is turned-on. The Audio Preamplifier Front Panel
29
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