Ampetronic HLS-DM1 Handbook
Page 2
Installation and Connection
1. The unit can be securely mounted using the 4 M3 mounting holes or an insulated sticky pad.
2. Connect loop feed cable to the loop clamp connector (see diagram).
3. Connect the low impedance speaker cable to input 1.
4. Use a screened cable <1m to connect an electret microphone to input 2.
5. Observing correct polarity, connect the DC power supply and apply power (see diagram). The
power indicator will illuminate.
6. With the input signal on, increase the Input control until the green AGC LED illuminates with a
normal signal.
7. Adjust the Output control until the amber Current LED is illuminated with signal peaks.
8. Use an Ampetronic FSM to test the system and adjust as required to be consistent with the
requirements of the latest IEC 60118-4 Standard. Use the MLC control to adjust for high
frequency loss.
Fault Conditions
Overheating: The amplifier will output max rated sine current for 1 minute into rated load. After
this period an internal protection mechanism will attenuate the output.
Overcurrent / Overvoltage: The amplifier will shutdown if its capabilities are exceeded for a
short period. The amplifier will resume normal operation when operated within the normal
parameters.
Input 2
Screw Adjust
Loop Current
Screw Adjust
MLC
Screw Adjust
Power LED
AGC LED
Loop Current LED
Loop
Clamp
Connector
Input 1
Screw Adjust
M3 Mounting
Input 2
Mic
+
Mic -
Input 1
Line
+
Line -
DC
+
DC -
