Meyer Sound 750-LFC - INTELLIGENT AC POWER SUPPLY

CHAPTER 2: POWER REQUIREMENTS
12
You can use the following table as a guide to select cable
gauges and circuit breaker ratings for the system’s operat-
ing voltage.
The minimum electrical service amperage required by a
loudspeaker system is the sum of the maximum long-term
continuous current for all loudspeakers. An additional
30 percent above the minimum amperage is recommended
to prevent peak voltage drops at the service entry.
NOTE: For best performance, the AC cable volt-
age drop should not exceed 10 V (10 percent at
115 V and 5 percent at 230 V). Make sure that even
with AC voltage drops that the voltage always remains
within the loudspeaker’s operating range.
INTELLIGENT AC POWER SUPPLY
The 750-LFC’s Intelligent AC™ power supply automatically:
■ Selects the correct operating voltage, allowing interna-
tional use without manually setting voltage switches;
■ Eliminates high inrush currents with soft-start power up;
■ Suppresses high-voltage transients up to several kilovolts;
■ Filters common mode and differential mode radio fre-
quencies (EMI);
■ Sustains operation temporarily during low-voltage periods.
Powering on the 750-LFC
When powering on the 750-LFC, the following startup
events take place over several seconds.
1. Audio output is muted.
2. Voltage is detected and the power supply mode is auto-
matically adjusted as necessary.
3. The power supply ramps up.
4. On the user panel, the On/Status LED flashes multiple
colors successively.
5. The On/Status LED turns solid green, indicating the
loudspeaker is ready to output audio.
CAUTION: If the On/Status LED does not turn
solid green, or the 750-LFC does not output
audio after 10 seconds, remove AC power immedi-
ately and verify that the voltage is within the required
range. If the problem persists, contact Meyer Sound
Technical Support.
750-LFC Current Draw
Current Draw 115 V AC 230 V AC 100 V AC
Idle 0.39 A rms 0.38 A rms 0.42 A rms
Maximum Long-Term
Continuous
5.3 A rms 2.7 A rms 6.2 A rms
Burst 9.2 A rms 4.4 A rms 10.7 A rms
Maximum Instantaneous
Peak
15.3 A peak 7.8 A peak 18.0 A peak
!