SM1-WP Microphone Instructions
The SM1-WP is a high quality, 12VDC powered, flush mount, omni-directional, pre-amplified,
weather proof microphone for use with DRVs, I/P cameras, etc. Note- the audio output of the
SM1-WP is “line level” (0db).
SM1-WP Microphone Placement.
The SM1-WP is designed for outdoor applications and can even withstand complete submersion
in water. Do not mount the microphone near air conditioning vents, light fixtures or electrical
equipment. The SM1-WP should be placed at least five feet away from the subject(s) to be
monitored. The SM1-WP is still useable in the range of 15-25 feet but is dependent on the level of
background noise in the area. Experimentation in the environment will determine what distances
work best.
Cable Run
Run a 22 gauge, stranded, two conductor shielded cable between the SM1-WPW microphone
and the monitoring device. Keep the cable run distance under 1,000 feet and away from AC
power sources, light fixtures and electrical equipment. Connect power to the + terminal, the audio
signal to the “audio” terminal and ground to the – terminal. The Ground of the power and audio
signal must share a common ground for proper operation.
See Figure 1 for connection diagram.
Mounting
The SM1-WP is designed to be surface mounted on any flat surface or on an exterior single gang
“bell” electrical box. Be sure to use the supplied gasket to prevent water from entering the
electronics.
Adjusting the SM1-WP Gain
The SM1-WP is shipped with the gain set at midrange. If the sound at the “head end” is distorted,
rotate the control towards the – mark (counter-clockwise). If the volume at the “head end” is too
low, rotate the control towards the + mark (clockwise).
