Specifications

Max. Continuous Amperes

APL-220, -500, and -800

Typical Program Conditions

100V AC

7.2 ARMS

4.8 ARMS

6.0 ARMS

4.0 ARMS

120V AC

3.0 ARMS

2.0 ARMS

240V AC

#1 shows both the theoretical maximum, and what can be expected under

typical high-level program conditions:

We recommend powering no more than 2 APL-220, -500, or -800s from a

single 15A, 120V AC circuit,and no more than 3 APL-220, -500, or -800s from

a single 20A, 120V 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 (88 – 275V AC).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 88V AC, this equates to 8.2 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.

Chart 1