Crown MARCO-TECH 5000VZ User Manual page 8

Notes
Reducing the voltage reduces the heat. Since the amplifier runs cooler,
you can safely pack more power into the chassis.
The VZ supply is divided ¡nto segments to better match the voltage and
current requirements of the power transistors. Remember that audio
signáis like music are complex waveforms.
For music the average level is always much less than the peak level.
This means a power supply does not need to produce full voltage all the
time.
The VZ supply is divided into two parís. When the voltage requirements
are not high, it opérales in a parallel mode to produce less vollage and
more current.
The power transistors slay cooler and are nol torced lo needlessly
dissipate heal. This is Ihe normal operaling mode of Ihe VZ power
supply.
When Ihe vollage requiremenls are high VZ swilches to a series mode
to produce higher vollage and less currenl. The amplified oulpul signal
never misses a beal and gels full vollage when it needs il—not when il
doesn't need ¡t.
Sensing circuilry walches Ihe vollage of Ihe signal lo delermine when
GROUNDEDBRIDGE
OUTPUT STAGE
Input
VZ
Power Supply
^
R = Switch Resistance
8 - MA-5000VZ