The CS640E’s are now ready for use.
To switch the units on, turn the knob on the front of each
amplifier clockwise until you feel a small click. The on/off
LED’s will illuminate and a low level bump should be
heard at the loudspeakers. You should now switch on the
pre-amplifier and the required source equipment. Like any
new product, your CS640E’s require a ‘running in’ period.
Allow at least 36 hours playing time for the components
to bed in and achieve their optimum performance.
When operating the CS640E’s from cold, you should
allow at least 30 minutes for the amplifiers to reach nor-
mal operating temperature.
It should be noted that at full power the heatsinks will
become hot and the sleeves may become warm to touch.
This condition is quite normal at high listening levels and
should not cause concern. In the event that the CS640E’s
are overdriven a thermal sensor on the heatsinks will cut
the mains power. This safety feature is activated when
heatsink temperature rises above 70˚C and is designed to
prevent damage to the CS640E’s. Once the temperature
has dropped below 40˚C normal operation will resume.
Cooling may take up to 15 minutes.
Page 11
English
INSTALLATION
CS640E
OPERATION
CS640E
English
Page 6
the front of the amplifiers have adequate air-
flow over them. This is achieved by the posi-
tioning of the amplifiers so that the fins are in
free air (see fig.1).
Side view of CS640E
Fig.1
Shelf
Improved airflow is achieved by positioning
the heatsink fins clear of the support shelf
Heatsink
Amplifier case
When used with a Crimson CS710 Pre-
Amplifier, the CS640E’s should be positioned
to the left hand side. Ensure that there is a gap
of 1cm on either side of the CS640E’s. This will
increase airflow over the cases, which act as
additional heatsinks at high power levels (see
fig.2).
OPERATION
