14
Fans and Cooling System
The PSW-6 uses a forced-air cooling system with four fans
to prevent the amplifiers from overheating. The fans draw air
in through ducts on the front of the cabinet, over the
heatsinks, and out the rear of the cabinet. Since dust does
not accumulate in the amplifier circuitry, its life-span is
increased significantly.
The front grill surface acts as an air filter for the cooling
system and should always be in place during operation.
Despite the filtering, extensive use or a dusty operating
environment can allow dust to accumulate along the path
of the airflow, preventing normal cooling. We recom-
mend periodically removing the grill and amplifier module
and using a vacuum cleaner to clear dust from the grill,
fans, and heatsinks. Make sure that the air ducts are clear
and that there is at least six inches clearance for exhaust
behind the cabinet.
Two variable-speed primary fans run continuously with
an inaudible operating noise of 22 dBA at 1 m at their
slowest speed. The primary fans begin increasing
speed when either of the two heatsinks reaches 42°C.
The fans reach full speed at 62°C and are barely
audible near the cabinet, even without an audio signal.
In the unusual event that the heatsink temperature reaches
74°C, the secondary fans turn on and are clearly audible.
The secondary fans turn on in response to
primary fan failure (check status immediately);
high source levels for a prolonged period in hot
temperatures or direct sunlight;
accumulation of dust along the cooling path;
driver failure.
The secondary fans turn off when the temperature
decreases to 68°C.
TROUBLESHOOTING NOTE: In the highly unlikely event
that the secondary fans do not keep the temperature below
85°C, the PSW-6 automatically shuts down until AC power
is removed and reapplied. If the PSW-6 shuts down again
after cooling and reapplying AC power, contact Meyer
Sound for repair information.
Rigging
A single PSW-6 weighs 442 lb (201 kg) and has twelve
pivoting lift rings (six on top, six on bottom), each with a
maximum working load capacity of 1500 lb (5:1 safety
factor).
Rigging load ratings assume a straight tensile pull and that
the cabinet is in new condition. If these conditions are not
met, the load ratings can be reduced significantly. Load
ratings can also be reduced by age, wear, and damage.
It is important to inspect the rigging hardware regularly
and replace worn or damaged components immediately.
The cabinet, exposed electronic circuitry, and drivers can
receive protective treatment that permits safe use in wet
conditions. Additionally, a rain hood can be fitted to shield
cables and electronics.
Do not install a unit outdoors
without weather protection!
Contact Meyer Sound for
more information.
NOTE: All Meyer Sound products must be used in accor-
dance with local, state, federal, and industry regulations. It
is the owners and/or users responsibility to evaluate the
reliability of any rigging method for their application. Rigging
should be done only by experienced professionals.
