SLEEP mode greatly extends the life of the components, and reduces power
consumption at idle. It makes APL-
1
0, -
1
2, and -SB products appropriate for
locations where it may be difficult to access the speaker for routine power-
up and power-down.
NOTE: If the system is to be left for long periods of time without use, it is
recommended that power be removed as a safety measure. In some regions,
power lines are subject to large voltage spikes from electrical storms or gen-
erator malfunction. If the power cable is removed, such occurrences cannot
damage the unit.
When installing and using the APL-
1
0, -
1
2, or -SB, some simple precautions
should be followed.These include:
(
1
) Maintain Proper Air Flow
The APL-
1
0, -
1
2, and -SB are radiant- and convection-cooled devices.The alu-
minum heat-exchanger mounted on the rear surfaces provides primary cool-
ing of the system. Care must be taken to locate the units away from heat reg-
isters, heat-generating appliances, lighting equipment, and any other appara-
tus that could raise the temperature of the nearby air.
The APL-
1
0, -
1
2, and -SB require unimpeded air circulation in order to func-
tion properly (this is especially important when multiple units are used in
stacked and/or tight-pack configurations). The APL’s rear surface should be
located at least
1
8" away from walls and/or ceilings. Lamps, especially of the
high intensity or theatrical type, should never be allowed to shine directly on
the heat exchanger.
(2) Ambient Temperature
The APL-
1
0, -
1
2, and -SB are designed to be used in ambient temperatures
ranging from 32°F -
11
3°F (0°C - 45°C). Higher or lower temperatures
could cause system shutdown or result in early component failure. When
used outdoors on a hot day, take precautions to avoid direct sunlight on the
rear heat exchanger. Direct, intense sunlight can raise the temperature of the
heat exchanger to a point where the amplifiers may be required to shut-
down to avoid permanent damage.
(3) More About Heating and Cooling
The APL-
1
0, -
1
2, and -SB have a relatively complex thermal dynamic system.
They contain several heat sources (amplifiers, power supplies, and drivers)
that generate significant heat but only when program material is being repro-
duced.They are cooled primarily through heat radiation from the rear panel
Installation
1
8
