QSC KS Series - Power and Cooling; Cooling Requirements; AC Mains Connection; Power Switch and LED

14
TD-001536-01-B
Cooling
The KS Series Subwoofers contain an internal power amplifier that produces heat. Allow a minimum of 15 cm (6 inches)
clearance around the cabinet for convection cooling. Keep anything that might restrict airflow away from the rear of the
enclosure (i.e draperies, walls, etc.)
CAUTION: Do not operate the subwoofer with its amplifier module exposed to direct sunlight because
overheating will cause its protection circuitry to reduce its maximum output.
For full performance to specification keep the ambient temperature to below 50° C (122° F). KS Series
subwoofer enclosures are not weatherproof, so do not install them where they will be exposed to rain or other
water sources. Do not install outdoors without also protecting them from the elements.
AC Mains
See Figure 16.
AC Mains Disconnection
Use the power switch to turn the amplifier off. Unplug the AC mains cord from the power
source. The subwoofer has a V-LOCK latching IEC connector system; press the yellow
button on the IEC plug to release the cord from the socket. Grasp the plastic body of the
IEC connector to pull it out; do not pull on the cord.
Turning Your KS Series Subwoofers On
Connect the AC power cord to the IEC socket on the back of the amplifier. Make sure
it is fully inserted. The V-LOCK power cord has a special latching feature to prevent
unintentional detachment. The IEC cable plug and chassis socket are both blue so you
can easily identify the KS subwoofer cord. If the cord is lost or damaged, a standard
IEC power cord of 18 AWG or larger may be used in its place, though it will not have the
latching system. Replacement V-LOCK cords are available from QSC.
NOTE: Make sure that the AC power switch is OFF before connecting the AC power cord to the AC source.
Connect the AC power cord to the facility’s AC outlet. The amplifier modules are equipped with a universal power supply
that can use AC power voltages ranging from 100to240VAC at 50 – 60 Hz.
WARNING: Use only the power cable that is appropriate for your location.
Power Switch
Use the rocker switch to apply AC mains power to the amplifier. When the amplifier is on, the blue POWER indicator LED
comes on.
Rear POWER Indicator LED
If the LED does not come on within 3 seconds after the amplifier module is turned on, verify that the power cord is
properly connected to both the subwoofer and the AC mains outlet. Make sure the outlet is functioning properly, too.
NOTE: If the power cord is good and the outlet is operating properly yet the subwoofer does not turn on, it
may require servicing. Contact QSC Technical Services Group.
– Figure 16 –