Clear-Com RS-603 (No longer available) - Manual (Page 34)

V - P A C K I N S T R U C T I O N M A N U A L 5 - 2
Figure 2: Headset options for a single-channel beltpack
MAIN HEADSET MICROPHONE OPTIONS
You can select either a dynamic or an electret microphone as the main
microphone, as shown in Figure 3. When you select an option, the beltpack sets
the appropriate audio levels for that option.
Most standard XLR-terminated intercom headsets use dynamic microphones. An
electret microphone produces a stronger audio signal than most dynamic
microphones, and does not pick up hum from surrounding equipment.
You can also select between high gain and low gain for the microphone input.
Normal operation is high gain. The low gain setting reduces the amount of
ambient noise that travels to the intercom channel when a beltpack’s microphone
is on.
Typically, you choose “low gain” for an electret microphone because of the
microphone’s stronger audio signal. A dynamic microphone usually works best
with the high-gain setting, which is the default.
Figure 3: Main headset microphone options for a single-channel beltpack