McIntosh MCC404/MCC404M - Manual (Page 14)

14
How to Operate in Four or Three Channel Mode
How to Operate Four Channel Mode How to Operate Three Channel Mode
In the 4 Channel Operating Mode, all channels operate as
independent 100 watt amplifiers. A typical four channel
application is to drive a pair full range loudspeakers in the
front section of a vehicle and a second pair in the rear. Re-
fer 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 3, 4
position for 4 Channel Mode.
Sensitivity Controls
The Sensitivity Controls allow setting of the input level of
all four amplifier channels to provide an ideal match for the
signal source being used.
Output Mode
Set both OUTPUT MODE Switches to the STEREO posi-
tion to configure the amplifier for 4 channel operation.
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 Three Channel, Tri-amp Mode, channel 1 operates as
a 100 watt amplifier for the tweeter, channel 2 operates as a
100 watt amplifier for the mid-range and bridged channels
3&4 operate as a 400 watt amplifier driving a woofer.
Power
The MCC404/MCC404M will turn on or off when the con-
trol center turns On or Off.
Note: There must be an Amp ON connection between the
MCC404/MCC404M and the signal source in order for
the amplifier turn On and Off to function.
Input Source
Set the Channel 3-4 INPUT SOURCE Switch to 3, 4.
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 woofer level balance and Sensitivity Control 4 has no
effect.
Output Mode
Set the Channels 1-2 OUTPUT MODE Switch to the STE-
REO position. Set the Channels 3-4 OUTPUT MODE
Switch to the BRIDGED position.
High Pass Filter
Set both the High Pass Filters’ FREQUENCY Controls to
50 and the MULTIPLIER Switches to X.1.
Low Pass Filter
Set the Low Pass Filter Switches to OUT.
Figure 9
Figure 10