p. 15
features overview
3
rear panel
7
Circuit breaker
There is one circuit BREAKER on the CPX amplifier. This breaker is provided
to limit current to the associated power transformer, and protect it from over-
heating and possible destruction due to fault conditions in the unit. The trip cur-
rent values have been carefully chosen to allow reasonable continuous power
output performance, while still protecting the power transformer. This breaker
should not trip unless there is a fault in the amplifier circuitry that causes exces-
sive mains current draw. However, abnormal conditions such as a short circuit
on either or both channels, or continuous operation at overload or clipping
(especially into 2-ohm loads per channel or 4-ohm bridge load) can cause the
breaker to trip. If this occurs, turn the POWER switch OFF and reset the break-
er, after waiting a brief period of time to allow the unit to cool down. Efforts
should be made to correct the cause of the overload if possible. When tripped,
the button on the BREAKER will be outward approximately ¼" and can be
reset by pushing inward and upward. A normal reset button is relatively flat. If
the breaker trips instantly each time you attempt to turn the unit on, it should be
taken to a qualified Crest Service Center for repair.
8
IEC Mains connector
This is a standard IEC power connector. An AC mains cord having the appro-
priate AC plug and ratings for the intended operating voltage is included in the
carton.
US Domestic AC Mains cord (not pictured)
The mains cord supplied with the unit is a heavy-duty, 3-conductor type with a
conventional 120 VAC plug with ground pin. It should be connected to an inde-
pendent circuit capable of continuously supporting at least 15 amps. This is
particularly critical for sustained high-power applications. If the outlet used does
not have a ground pin, a suitable grounding adapter should be used and the
third wire grounded properly.
Never break off the ground pin on any equipment. It is provided for your safety.
The use of extension cords should be avoided but, if necessary, always use a
3-wire type with at least a #14 AWG wire size. The use of lighter wire will
severely limit the power capability of this amplifier. Always use a qualified elec-
trician to install any new electrical equipment. To prevent the risk of shock or
fire hazard, always be sure that the amplifier and all associated equipment is
properly grounded.
