Dynacord DPA 4411 Outputs, Power Output for the connection of 100 V loudspeaker systems

Page 7

5. Outputs

5.1 POWER OUTPUT

All power outputs are balanced and floating. When factory-shipped, the outputs are pre-configured for the connection of 100 V loudspeaker systems. Connection is achieved through plugging the supplied 8-pole socket into the connection strip (19). Switching the output transformer allows to change the output voltage to 70 V, 50 V or 20 V (see paragraph 8). When set to 20 V, operation of low impedance speakers with a load of 4 ohms is possible.

Caution During operation it is possible that the outputs of the POWER OUTPUT connector may conduct dangerous voltage (>34 V in peaks). Therefore, observing applicable safety regulations is mandatory when connecting and installing loudspeaker lines

(see also paragraph 9.2).

5.2 POWER OUTPUT for the connection of 100 V loudspeaker systems

The use of speaker systems with 100 V matching transformers is recommended to reduce the lack in performance when the distance between amplifier and speaker systems exceeds 50 m. This m ethod also offers an easy way to distribute the output power. The total power consumption of the maximum amount of the connected speakers in the network has to match the amplifier’s overall output capacity of 100 watts (connection impedance 100 ohms). The connection is accomplished via the 100 V output (19)

(see figure 3).

diagram 3 Connection of 100 V (70 V or 50 V) loudspeaker systems

5.3 POWER OUTPUT for the connection of low-impedance loudspeaker systems

When switching the output to 20 V, low-impedance speaker systems (4-16 ohms) can be connected to the corresponding output (see diagram 4). Because of line attenuation, the distance between amplifier and speaker systems should not exceed 50 m. It is of further importance that the overall impedance of the speakers does not decline 4 ohms and that the individual power handling capacity of each speaker is not exceeded.

diagram 4 Connection of low-impedance loudspeaker systems

25

Image 7
Contents Features Power Amplifier DPAFor US and Canada only Important Safety InstructionsCircuit ⊥ to Chassis Switch Indicators, Controls And ConnectionsTable of Contents Before Initial Operation 3.1 Mains Operation Installation NotesUtilization Amplifier has to be protected againstInputs Input 1 to Input Battery Operation 24 V DCOutputs Power Output for the connection of 100 V loudspeaker systemsMonitor output Power Output 100 V Double Output PowerIntegrated Remote Module Ready Indicator Indicators And Fault Notification 7.1 Standby IndicatorProtect Indicator Meter Instruments And Clip Indicators Ground Fault IndicatorStatus Indicator To Install The NRS 90206 Proceed As Follows see diagram To Install The NRS 90207 Proceed As Follows see diagram NRS 90207 Ground Fault SurveillanceChecking The Function Of The NRS NRS 90208 Input Transformer For Floating, Balanced Inputs Retrofitting The NRS 90208 On The Printed Board AssemblyRemove the input printed board assembly 81331 see diagram Installation of the rear panelFlightcase Or 19-Rack System Installation To Install The NRS 90227 Proceed As Follows see diagramFuses Ground Lift Switch Circuit ⊥ to Chassis SwitchPage DPA 4411 Specifications NRS 90227 monitor output transformer NRS 90207 ground fault surveillance for four outputsExtension kits for the DPA NRS 90208 input transformer per single input