Crown CE Series Reference Manual page 42

CE-Series Amps with an Attitude!
Voltage & Current circuit. This circuit protects the devices from
extending beyond their safe area of operation, but allows the
devices to provide high bursts of peak power with music, al-
lowing your amplifier to deliver more punch. When all is said
and done, this amplifier output topology offers a good combi-
nation of low quiescent amplifier heating and great distortion
performance at high powers for a reasonable complexity, reli-
ability, and value.
All output power is delivered through 4-circuit Speakon ® con-
nectors. These connectors have been wired in such a way as
to allow you the most versatility. The Channel 1 and 2 connec-
tors are cross wired so you can cover all options, from dual
cable stereo (typical), to Bridge-Mono in one connector, to run-
ning a bi-amp speaker with one amplifier and one cable per
speaker cabinet!
The output relay, in conjunction with input signal mute circuit,
assures the amplifier will be well-behaved during turn on and
off. In the event of an amplifier output failure, a triac will fire
across the offending channel and act to protect your speak-
ers.
The turn on delay circuit functions to keep the output relay
open until all the voltages are up and stable, both in the ampli-
fier, and in all the components in the system ahead of the am-
plifier.
Heatsink temperature is monitored by a thermal probe at-
tached to the heatsink. As the temperature rises, the probe
sends a proportional current to the proportional speed fan cir-
cuit which starts the fan. Should the power transformer reach
its maximum safe temperature, an internal thermal switch
opens and the fan circuit turns on full speed to quickly cool
Page 42