p.6
Installation
2
Cooling Requirements
CKi amplifiers use a forced-air cooling system to maintain a low,even operating tempera-
ture.Air drawn by a fan mounted behind the front panel enters through the front grille and
the heated air exits through the side panel ports.On two an three space CKi amplifiers the
fan will remain inactive until operating temperature rises to 45° C.One four space units the
fan runs all the time.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. System cooling
needs must be considered before installation,and the system installer/designer should specify
appropriate countermeasures,such as ventilation,air conditioning,etc.Refer to Appendix A
for specific thermal emission figures.
Note:If the amplifier is rack-mounted,do not use doors or covers on the front or rear
without pressurizing the rack.Make sure that heated air can escape freely,and that there is
no resistance to the intake of cool air.Intake and exhaust air must flow without restriction.
Fan filters should be regularly cleaned and periodically replaced.
Circuit Size Requirements
CKi amplifier power requirements are rated at “idle,” 1/8th power (“typical” music condi-
tions),1/3rd power,and maximum rated power.The maximum power current draw rating is
limited by the amplifier's circuit breaker.Consult Appendix A for the current that each ampli-
fier model will demand.AC mains voltage must be the same as that indicated on the rear of
the amplifier.Damage caused by connecting the amplifier to improper AC voltage is not cov-
ered by any warranty.
PowerSave
All CKi amplifiers come standard with PowerSave circuitry.This effectively reduces current
draw and thermal emissions to a minimum when the amplifier is at idle.PowerSave operates
by cutting off the bias current to the output stage after absence of signal is sensed at the
input.When signal presents itself,PowerSave instantly restores the bias current after the first
positive-going waveform.Current draw specifications while PowerSave is active are included
in specifications under "Idle Current Draw."
Maintenance
CKi amplifiers require little routine maintenance.
When used in an extremely dusty or smoky environment,the unit should be periodically
blown free (using compressed air) of any foreign matter that may have built up inside.
When used in an environment where residue from smoke/fog machines is regularly present,
the amplifier(s) should be periodically checked (by authorized Crest service personnel) for
build-up of that residue.
The filter in the front panel air intake grille should be periodically cleaned. Should the filter
become permanently clogged or damaged,a replacement should be obtained through your
Crest representative
Users will not need to make any adjustments to the amplifier during its lifetime.Other than
installing or replacing a NexSys module,there are no user-serviceable parts or adjustments
that require opening the unit.
Always turn off and
disconnect the
amplifier from the mains
voltage before making
audio connections.If
possible, as an extra pre-
caution,have the attenu-
ators turned down dur-
ing power-up.
+
To Next Page
Loading...
