HSM11-D Speaker / Microphone Instructions
The HSM11-D is a combination 30W 70V speaker and pre-amplified microphone designed to be used in outdoor
applications. The HSM11-D is designed to directly interface with the ETS SMA1-xx for connection to DVRs, IP cameras,
etc. but, can be used with other compatible equipment.
Note- to prevent unwanted feedback, use this product with
systems supporting PTT (push to talk) half duplex audio or full duplex audio systems using acoustic echo cancelling
technology
HSM11-D Microphone / Speaker Placement.
Locate the HSM11-D speaker / microphone near the area of interest in the space to be monitored. If a large area is to be
monitored, locate the HSM11-D in the middle of the space if possible. Avoid mounting the speaker / microphone near air
conditioning vents, light fixtures or electrical equipment. The HSM11-D should be placed as close to the subject(s) as
possible. 5 to 10 feet is ideal. The HSM11-D is still usable in the range of up to 50 feet in public address applications 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 HSM11-D microphone / speaker and the SMA1-xx or other equipment. Keep the cable
run distances under 500 feet and away from AC power sources, light fixtures and electrical equipment. Make connections
as shown in Figure 1.
HSM11-D Connections
The HSM11-D is designed to be mounted on ceilings or walls and features up/down adjustments for directional aiming.
Make wire connections inside the weather tight box on the back of the HSM11-Dand screw the lid down. Mount the
speaker in a fashion that does not allow water to directly flow (from driving rain etc.) inside the junction box. Sound levels
for the speaker and microphone are user adjustable on the SMA1-xx interface box.
Note- Microphone and speaker volumes cannot be adjusted on the HSM11-D. Adjustments to volume levels can be done
at the other end of the cable on the connected ETS equipment or in the head end software of your system.
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