Cloud CA4250 Instrukcja instalacji i obsługi - Strona 12
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C l e a r l y b e t t e r s o u n d
Power sharing (high impedance output mode only)
Models CA2500/4250/6160/8125:
A fundamental design concept of CA Series amplifiers is the
availability of Power Sharing when one or more channels is
selected to HIGH Z mode, in order to drive 70/100 V-line
loudspeaker systems. The maximum power output capability
of all CA Series models except the CA2250 is 1 kW: the
maximum power output capability of the CA2250 is 500 W.
To use the amplifier to its maximum effectiveness, installers
wishing to use the high impedance output mode should
have an understanding of how this maximum power figure is
shared between channels.
All models except the CA2250 use two separate internal
power supplies, each rated at 500 W. The two supplies
serve the odd- and even-numbered channels respectively.
Each amplifier channel is capable of delivering 500 W, but
this figure can only be realised if the other channels in its
group (of odd or even-numbered channels) are unused. As
other channels in the same group are called upon to deliver
power, the maximum power available from any one channel
is reduced. If all channels are simultaneously driven with
equal input levels, and the LEVEL controls are adjusted to the
same setting, the maximum, multi-channel power rating of
the amplifiers can be stated as follows:
•
CA2500: 2 channels, 500 W/ch
•
CA4250: 4 channels, 250 W/ch
•
CA6160: 6 channels, 160 W/ch
•
CA8125: 8 channels, 125 W/ch
The great advantage of the power sharing principle is that it
allows installers to use some channels to drive speakers in
areas where only low power is needed, and others for areas
where more is needed.
It should be apparent that the 2 channel CV2500 is somewhat
independent of the power sharing principle, having only one
odd and one even channel.
Model CA2250:
Model CA2250 uses a single internal power supply rated at
500 W, which serves both Channel 1 and Channel 2. Power
sharing in high impedance mode is similarly available, but
only up to a total amplifier output power of 500 W. Each
channel is capable of delivering 500 W, but can only do
so if the other channel is quiescent. If both channels are
simultaneously driven with equal input levels, and the LEVEL
controls are adjusted to the same setting, the maximum,
two-channel power rating of the CA2250 can be stated as
follows:
•
CA2250: 2 channels, 250 W/ch
12
CA Series Installation & User Guide v1.0
NOTE: The principle of Power Sharing only applies to
amplifier channels selected to HIGH Z mode – i.e., used with
70/100 V-line loudspeaker systems. For channels selected
to LOW Z mode, the minimum speaker loads – 4 or 8 ohms
– must be observed. In these cases, the power capability
of the channel should be taken from the table below when
calculating the remaining power available for other channels:
MODEL
CHANNELS
POWER (low impedance mode)
CA2250
2
CA2500
2
CA4250
4
CA6160
6
CA8125
8
2 X 250 W
2 X 500 W
4 X 250 W
6 X 160 W
8 x 125 W