CSM8 Speaker / Microphone Instructions
The CSM8 is a combination 70V speaker and
pre-amplified
microphone designed to flush mount in an acoustic ceiling
tile, drywall, etc. The CSM8 is designed to directly interface with the ETS SMA1 for connection to DVRs, IP cameras, etc.
but, can be used with other comparable equipment.
CSM8 is for use in half duplex audio systems only. Audio whine or
“feedback” will be result if both speaker and microphone are active at the same time.
CSM8 Microphone / Speaker Placement.
Locate the CSM8 speaker
/
microphone near the area of interest in the space to be monitored. If a large area is to be
monitored, locate the CSM8 in the middle of the space if possible. Avoid mounting the speaker / microphone near air
conditioning vents, light fixtures or electrical equipment. The CSM8
should be placed as close to the subject(s) as
possible. The CSM8 is still useable at distances of up to 25 feet but is dependent on the level of background noise in the
area. Experimentation in the environment will determine what distances work best.
Audio Signal Cable Runs
Recommended cable is: 2 each 22 gauge, stranded, two conductor shielded cables (one for the microphone and the
other for the speaker) between the CSM8 microphone / speaker and the SMA1-xx or other equipment. Keep the cable run
distances under 1,000 feet and away from AC power sources, light fixtures and electrical equipment.
Make connections
as shown in Figure 1.
CSM8 Mounting
The CSM8 can be surface or flush mounted on ceilings or walls. For flush mounting, cut a 8.5
“ diameter hole in the wall or
ceiling tile to allow room for the speaker / microphone assembly and mount the CSM8 to the surface with screws after
making connections. For surface mounting, purchase a CSM8-S surface mount adaptor kit. Leave
the
factory set jumper
on the MSI circuit board in the 5 watt position.
CSM8 Speaker Volume
The volume of the CSM8 speaker can be changed by moving the jumper on the MSI-1 interface board. Move the jumper
to the 5W position for the loudest setting and .5W for the lowest setting.
CSM8 Microphone gain
The CSM8’s microphone output level can be adjusted by removing the speaker from the grill (four Kepnuts). Locate the
blue gain control on the SM1 board adhered to the grill. Adjust the control clockwise for more gain and counter clock-wise
for less gain.
