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CHAPTER 2: POWER REQUIREMENTS
12
■ Burst Current — The maximum rms current during a
period of around one second. The Burst Current is used
as a rating for magnetic breakers. It is also used for cal-
culating the peak voltage drop in long AC cable runs
according to the following formula:
V pk (drop) = I pk x R (cable total)
The Burst Current can also be used to calculate the AC
looping capability of Acheron Designer.
■ Ultimate Short-Term Peak Current — A rating for fast-
reacting magnetic breakers.
■ Inrush Current — The spike of initial current encoun-
tered when powering on.
You can use Table 2 as a guideline for selecting cable
gauges and circuit breaker ratings for the system’s operat-
ing voltage.
The minimum electrical service amperage required by an
Acheron Designer loudspeaker system is the sum of the
Maximum Long-Term Continuous Current for each loud-
speaker. 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
voltage drop should not exceed 10 V, or
10 percent at 115 V and 5 percent at 230 V. Make
sure that even with AC voltage drops that the AC
voltage always remains within the operating win-
dows.
ELECTRICAL SAFETY GUIDELINES
Pay close attention to these important electrical and safety
guidelines.
■ The Acheron Designer requires a grounded outlet.
Always use a grounded outlet and plug.
■ Do not use a ground-lifting adapter or cut the AC cable
ground pin.
■ Do not exceed the current capability of the 20-amp AC
Input connector for the loudspeaker. When looping loud-
speakers, consider the total current draw for all loud-
speakers on the circuit, including the first loudspeaker.
■ Make sure the AC power cable for the loudspeaker has
the appropriate power plug (on the other end) for the
area in which you will operate the loudspeaker. In addi-
tion, the AC power cable must be rated for the total cur-
rent draw of all loudspeakers looped from the power
source.
■ Do not operate the unit if its power cable is frayed or bro-
ken.
■ Keep all liquids away from the Acheron Designer to avoid
hazards from electrical shock.
Table 2: Acheron Designer Current Draw
Current Draw 115 V AC 230 V AC 100 V AC
Idle Current 0.23 A rms 0.19 A rms 0.24 A rms
Maximum Long-Term
Continuous Current
1.58 A rms 0.83 A rms 1.78 A rms
Burst Current 3.1 A rms 1.4 A rms 3.6 A rms
Ultimate Short-Term
Peak Current
12.0 A peak 8.0 A peak 12.4 A peak
Inrush Current 25 A peak 54 A peak 20 A peak
Earth ground
Chassis ground