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Power Outputs – AUDIO TRANSFORMER OUTPUTS
The two integrated output transformers convert the power amplier’s nominal output voltage to the com-
monly used loudspeaker line voltage standards – 25 V, 70 V, and 100 V. These voltages are simulta-
neously present at the correspondent oating outputs of the binding post strip. The two power amplier
channels can be operated using any possible output voltage combination. Simultaneous operation of low
impedance loudspeaker systems and oating loudspeaker lines on a single power amplier channel is
possible as well.
Caution It is possible that during operation shock-hazard output voltages can be present at the
power output connectors (>34 V peak value). Therefore, the connected loudspeaker
lines have to be installed in accordance to applicable security standards and regulations.
When installing and operating 100 V-loudspeaker networks, compliance to the VDE
regulation DIN VDE 0800 is mandatory. Especially, if a 100 V-loudspeaker network
is included in alarm system applications, all security standards have to be in accordance
to the security class 3 standard. Before the rst operation of the power amplier, the
loudspeaker terminal strip has to be covered using the supplied protection cover.
Power Outputs - Isolated Outputs 70 V and 100 V
To reduce line attenuation effects when the distance between power amplier and loudspeaker systems
exceeds 50 meters, it is recommended to employ loudspeaker systems with 100 V or 70 V line transfor-
mers, which also allows conveniently distributing the output power to the individual loudspeaker systems.
It is possible to connect as many loudspeaker systems until the total power consumption of the loudspea-
ker network equals the nominal power handling capacity of the power amplier; while not declining the
nominal load impedance of the power amplier outputs.
For details on nominal power handling capacity and nominal load impedance of the amplier’s individual
power outputs, please refer to the specications in the appendix.
100V
6W
100V
30W
100V
6W
100V
30W
70
100
0
100
700
ISOLATED OUTPUTS
DIRECT OUTPUTS
16 x 30W
83 x 6W
+
+
25V
100V
+
70V
+
BRIDGED
1200W/8
600W
100V
25V
+
70V
+
4
DUAL
B
A
+ + +
LOW IMPEDANCE
AUDIO TRANSFORMER OUTPUTS
B A
gure: example conguration – DPA 4260 with 100 V loudspeaker systems – maximum load
using 30 W / 100 V and 60 W / 100 V loudspeaker systems