Bosch 4410 Owner's Manual download pdf (Page 8)

5.4 POWER OUTPUT 100 V with double output capacity

If the output power of one output is not sufficient to feed all cabinets that are incorporated within a speaker

network and it is not possible to divide the speaker chain, doubling the output power can be achieved by

coupling the outputs of two DPA 4410. In that case the amplifier inputs are paralleled and the outputs are

connected in series (see also diagram 5).

Coupling is possible under the following restrictions: only identical amplifiers can be connected. Since

doubling the output voltage comes along with the serial connection, it is necessary to switch the outputs

of both amplifiers to 50 V (see also paragraph 8), resulting again in 100 V overall output voltage. In this

case the speaker chain’s minimum load impedance is 50 ohms. The LEVEL controls (13) of the two DPA

4410 have to be set fully to the right.

This procedure results in the following output combinations:

4 x 100 W or 2 x 100 W + 1 x 200 W or 2 x 200 W

For information about the input connection, please refer to paragraph 4 of this manual. For the connection

of the speaker network, please refer to the diagram below.

Attention During the operation the pins of the POWER OUTPUT strip may conduct dangerous

voltage (> 34 V in peaks). Therefore, the connected speaker networks have to be

installed in accordance to applicable security regulations (see also paragraph 9.2).

Diagram 5 Connecting 100 V speakers with a power increase to 200 V

5.5 MONITOR output

The MONITOR outputs (16) provide an unbalanced, low-impedance signal and are meant for the

connection of monitoring amplifiers. Since the outputs are of low impedance, the cable length of the

connected speaker systems may be up to 200 m. Connection is performed via the REMOTE CONTROL

D-Sub connector (see also diagram 6).

5.6 REMOTE CONTROL connection

The following control IN/OUTs are provided through the 15-pole D-Sub REMOTE CONTROL connector

(16):

- 24 V standby voltage - negative pole grounded

- POWER REMOTE start - closing contact over ground

- BATTERY REMOTE start - closing contact over ground

- MONITOR output - single-sided grounding

- READY message - off potential contact

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Bosch 4410 Owner's Manual Page 8