Installation Instructions

SM1-WPW Microphone Instructions
The SM1-WPW 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-WPW is “line level” (0db).
SM1-WPW Microphone Placement.
The SM1-WPW 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-WPW should be placed at least five feet away from the subject(s)
to be monitored. The SM1-WPW 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.
Sound Chamber Wind Screen
Over time the wind screen may become saturated with moisture or dirt and the sound quality and
volume will be noticeably reduced. If this happens, remove and soak the screen in soapy warm
water. Then, rinse and wring out the excess water from the screen and reinstall it.
Mounting
The SM1-W 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-WPW Gain
The SM1-WPW 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).