Built-In Protection
Amplifier Function and Operation
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The APA Series amplifiers feature integrated electronic protection including:
• Soft start function to prevent wave shock at power-on
• Delay function for prevention of shock at switch power-on
• DC current protection
• Over-electric current protection
• Cut-wave protection
• Overheat protection • Overheat protection
7. Power LED Indicates power is on.
5. & 6. Channel A/B Clip LED
When the output level is maxed out, the power will
clip as a result; please reduce the input levels.
Another possible reason for the light: you should
not have sound from an input of one signal, the LED
will remain lit continuously. Power of the amplifier,
check your equipment and restart.
4. Channel A Level Adjustment Use this knob to adjust volume.
3. Protection Level Indicator
This LED turns on 5-10 seconds after power
ON. It is now in standby status, ready for use.
Another possible reason for the light is internal
temperature above 185 degrees Fahrenheit.
Another possible reason for the light: the amplifier
is not functioning optimally and the center-voltage
should be switched to unbalanced.should be switched to unbalanced.
2. Channel B Level Adjustment Use this knob to adjust volume.
1. Power ON / OFF
Power the device ON and the soft start and
wave shock prevention activates. The soft
boot-up of the amplifier takes about 4 seconds
to complete and a silent ‘double noise’ can be
heard indicating the unit is ready for
operation. You can now connect your speakers
to the unit.to the unit.
