Requirements And Considerations; Cooling Requirements - Crest Audio CKd 604 Owner's Manual

CKd Power Processing amplifiers are 2 rack space units of 20.50" (52.07
cm) depth that mount in a standard 19-inch rack." Due to the fixed power
cord extrusion, the amplifier comes with the rack ears mounted. Total
depth is 21.75" (55.24). It's 21.25" (54cm) to the center of the ear mounting
hole. Because of the cables and connectors on the rear panel, a right-angle
or offset screwdriver or hex key will make it easier to fasten the rear
mounting ears to the rails.

Requirements and Considerations

Circuit Size Requirements
CKd Power Processing amplifier power requirements are rated at "idle,"
1/8th power ("typical" music conditions), 1/3rd power, and rated power.
Note: Always turn off and disconnect the amplifier from the mains voltage
before making audio connections. If possible, as an extra precaution, have
the attenuators turned down during power-up.

Cooling Requirements

CKd Power Processing amplifiers use a forced-air cooling system to
maintain a low, even operating temperature. Air drawn by a fan mounted
behind the front panel enters through the front grill and cools the amplifier's
power MOSFET's. Heated exhaust air exits through the side panel ports.
Fan is on at low speed with switch on Standby. Fan speed increases when
switched to On. Make sure that there is enough space around the front of
the amplifier to allow air to enter, and around the sides to allow the heated
air to exit. See page 11 for intake and exhaust locations.
Note: If the amplifier is rack-mounted, do not use doors or covers on the
front or rear without pressurizing the rack. Whatever type of rack you are
using, make sure that heated air can escape freely, and that there is no
resistance to the intake of cool air through the front grill. Intake and
exhaust air must flow without resistance. Ensure that fan filters are
regularly cleaned and periodically replaced. (No tools are required for filter
removal)
Thermal Emissions
System cooling needs must be considered before installation, and the
system installer/designer should specify appropriate countermeasures,
such as ventilation, air conditioning, etc.
CKd Series Owners Manual v1e
CKd Owner's Manual
Make certain that there
is enough space around
the front and rear of the
amplifier to allow the
heated air to escape.
Suggestion: In racks
with closed backs allow
at least one standard-
rack-space opening for
every four amps.
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