Emtech Electronics RCM-82B - Manual (Page 3)

RCM-42 and RCM-82 Installation and Application Notes
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2003, Emtech Electronics, Inc. All rights reserved.
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The input connection terminals are shown in Figure 1. The input signals can come from any balanced or unbalanced
line level source such as a mixer/amplifier. The shield of a balanced line should be connected to the terminal marked
GND on the matrix. When the source is unbalanced, strap the "input -" terminal to the GND terminal. Whether the
source is balanced or unbalanced, shielded audio cable should be used for these connections to minimize noise and hum
pickup. The output connection terminals are also shown in figure 1. The output signal can be sent to any line level
input, such as a mixer/amplifier. As with the output connections, shielded audio cable should be used.
The two control inputs terminals for each room/buss are marked GROUP A and GROUP B as shown in Figure 1.
These two connections can be wired to remote switches; a simple closure to ground will then assign that room to the
corresponding combining group. When Group A and Group B control terminals are open, (not connected to ground)
the input signal is simply routed back to its corresponding room output.
Figure 1: Terminal Connections on RCM-42B