Apogee APL-220, Руководство пользователя

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We recommend powering no more than 2 APL-220, -500, or -800s from a
single
1 5A, 1 20V AC circuit, and no more than 3 APL-220, -500, or -800s from
a single 20A,
1
20V AC circuit, thereby allowing a margin for low voltages.
The advanced design of the APL-220, -500, and -800 allow them to function
properly over a wide range of voltages. The power supplies are designed to
perfectly maintain the amplifier’s internal bus voltage throughout this range,
with no degradation in performance. However, it is important to be aware
that the unit will draw more current if the power line voltage decreases.
Under full-power conditions, one APL-220, -500, or -800 can draw as much
as 720 watts. At 90V AC, this equates to 8.0 Amperes whereas at 240V AC,
the current demand is only 3 Amperes, to produce the same amplifier power.
Power (Wattage) is simply voltage (RMS) times current (RMS) or:
P = V x I
You can easily calculate the power demand at any line voltage by using the
following formula:
P / V = I
For example: if the line voltage is 208V AC, a single APL-500 at maximum
power (720 Watts) will draw 3.46 Amperes (720 / 208 = 3.46). This calcula-
tion is useful for determining appropriate cables to use with your powered
speaker system.
To determine the total current requirement for a system of powered loud-
speakers, simply add their Maximum Continuous RMS Currents together,
then calculate a safety margin of 25% or greater.
If special length AC cables are required for your powered speakers, they
should be constructed of durable, high-quality portable cordage such as S,
SO, or SJO type.
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