McIntosh MCC404/MCC404M - Manual (Page 15)

15
How to Operate in Two Channel or Subwoofer Mode
How to Operate in Two Channel Mode How to Operate in Subwoofer Mode
In the Two Channel Mode channels 1 and 2, and channels 3
and 4 operate in bridged configuration as a pair of full fre-
quency range 400 watt amplifiers. A typical application is
use of a more powerful amplifier for stereo reproduction.
Refer to figures 9 and 10.
Power
The MCC404/MCC404M will turn on or off when the
Control Center turns On or Off.
Note: There must be an Amp ON connection between the
MCC404/MCC404M and the signal source unit in order
for the amplifier power turn On and Off to function.
Input Source
Set the channel 3-4 INPUT SOURCE Switch to 3, 4.
Sensitivity Controls
The Sensitivity Controls 1 and 3 allow the setting of input
level of both bridged pairs of amplifier channels to provide
an ideal match for the signal source being used.
Output Mode
Set both the channel 1-2 OUTPUT MODE Switch and the
channel 3-4 OUTPUT MODE Switch to the BRIDGED
position to configure the amplifier for two channel opera-
tion.
High Pass Filter
Set the High Pass Filters’ Frequency Controls to 50 and the
MULTIPLIER Switch to X.1. This will pass the full au-
dible spectrum yet filter out power robbing sub-sonics be-
low 5 Hz.
Low Pass Filter
Set the Low Pass Filter Switches to the OUT position since
both channels are operating at full frequency range.
In the Sub Woofer Operating Mode, channels 1&2 operate
as independent 100 watt amplifiers, driving two midrange
and high frequency or full range speakers. Channels 3&4
operate in Bridged Mode as a single 400-watt amplifier,
driving a low frequency speaker. A typical Sub application
is to drive two upper-range loudspeakers and one woofer or
subwoofer. Refer to figures 9 and 10.
.
Power
The MCC404/MCC404M will turn On or Off when the
Control Center turns on or off.
Note: There must be an Amp ON connection between the
MCC404/MCC404M and the signal source unit in order
for the amplifier power turn On and Off to function.
Input Source
Set the channel 3&4 INPUT SOURCE Switch to the 1-4
(SUB) position to send the summed signals from input 1&2
to the bridged channels 3&4 for low-pass filtering.
Sensitivity Controls
The Sensitivity Controls allow setting the input level of
amplifier channels 1, 2 and 3 to provide an ideal match for
the signal source being used. Sensitivity Control 3 adjusts
the subwoofer level balance and Sensitivity Control 4 has
no effect.
Output Mode
Set the channels 1-2 OUTPUT MODE Switch to the STE-
REO position and the channels 3-4 OUTPUT MODE
Switch to the BRIDGED position to operate in the three
channel bi-amp mode.
High Pass Filter
Set the channel 3-4 High Pass Filters’ FREQUENCY Con-
trol to 50 and the MULTIPLIER Switch to X.1. Set the
channel 1-2 High Pass filter Frequency Controls the fre-
quency above which you wish to send to the upper range
speakers.
Example: To send frequencies above 200Hz to the upper range
speakers, the FREQUENCY Control to 200 and the
MULTIPLIER Switch to X1.
Low Pass Filter
Set the channel 1-2 low pass filter to OUT. Set the channel
3-4 Low Pass Filter controls to the frequency below which
you wish to send to the subwoofer.
Example: To send frequencies below 200Hz to the subwoofer,
set the FREQUENCY Control to 200 and the
MULTIPLIER Switch to X1.