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Free combination of the DPA 4411’s power output voltages, including mixed 100 V and low impedance
(4 ohms) operation, is possible.
5.4 POWER OUTPUT 100 V - Double Output Power
If the output power of one output of the DPA 4411 is not sufficient to feed all cabinets within a speaker
network and dividing the speaker chain is not an option, it is possible to double the output power by
coupling the outputs of two amplifiers. In that case the amplifier inputs have to be paralleled and the
outputs are connected in series. For the connection of inputs, please refer to paragraph 4. For the
connection of the loudspeaker network, refer to diagram 5.
Coupling is possible under the following restrictions: only identical amplifiers or power amps can be
connected. Since doubling the output voltage comes along with serial connection, it is necessary to switch
the outputs of both amplifiers to 50 V (see also paragraph 8), resulting again in an overall output voltage
of 100 V. In this case the speaker chain’s minimum load impedance is 50 ohms // 50 nF. The input level
controls of the corresponding channels of the DPA 4411 have to be set to equal values (refer also to the
PROMATRIX handbook).
This results in the following output combinations with a single DPA 4411:
4 x 100 W or 2 x 100 W + 1 x 200 W or 2 x 200 W.
diagram 5 Possible output configuration of the DPA 4411
5.5 MONITOR output
The MONITOR output of the DPA 4411 is configured as monitor bus. It gets connected to the PROMATRIX
Manager DPM 4000 via the serial port REMOTE CONTROL (13). If a floating output is needed, the output
is prepared for retrofitting a monitor output transformer. In this case the extension NRS 90227 is necessary
(see paragraph 9.4). The low-impedance monitor output is electronically balanced. Therefore, the
connected cables may be up to approx. 200 m in length.
The PROMATRIX Manager DPM 4000 (see PROMATRIX handbook) offers connection for monitor
amplifiers; which can be set to input-monitoring or output-monitoring for the desired amplifier channel.
6. Integrated Remote Module
The integrated remote module of the power amplifier DPA 4411 provides the following functions:
• input levels of INPUT 1 to INPUT 4 can be set via programmable audio level controls
• reading level values of the audio level controls
• setting level offsets 1 to 4 via virtual controllers
• mute function 1 to 4 (via level controls)
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