Bosch Appliances 3.5 manual en, Loudspeaker lines, Bosch Security Systems, PRS-1B500, PRS-2B250

Praesideo 3.5 Installation and User Instructions 4 Amplifiers

en 171

10.3.5.2 Loudspeaker lines

Between the Lsp Out+ and Lsp Out- connections, the loudspeakers must be connected. The voltage between these connections (100 V, 70 V) depends on the position of the jumper on the output board (see figure 10.7).

It is possible to use the different voltages to reduce the volume of the loudspeaker line. For example, if all loudspeakers are suitable for 100 V, the maximum output level is 40 dBV. If the loudspeaker line voltage is set to 70 V, the maximum output level is reduced to 37 dBV (difference: -3 dB).

Caution

Check the specifications of the loudspeakers to find out which maximum voltage can be provided on the loudspeakers outputs of the power amplifiers.

To reduce the risk of electric shock do not perform any servicing other than that contained in the operating instructions unless you are qualified to do so. See section 1.2 Intended audience.

PRS-1B500, PRS-2B250

R356

R352

X100

2 1

B

B

1

1

-

1

X6

X4

+

1

X151

S350

8

1

8

1

X103

1

1

1

16

1

16

R140

R190

9

9

mA

X3

X153

X1

1

X550

+

375

X300

1

mA

F250

X500

+

X400

-

375

375 mA

F451

F450

375 mA

X155

2

1

+

1

375 mA

100V

70V

100V

70V

X302

+

X402

X405

X404

X305

X304

+

X403

X303

1

+

+

24

X5

+

X401

X301

-

-

+

+

-

100 V

70 V

F50

6.3A

R305

375

R405

+

+

B

+

mA

B

-

-

-

+

+

+

F400

F300

-

F750

+

2.A

+

+

5

-

+

+

X2

X651

X650

PRS-4B125

1

4

3

2

1

70 V

100 V

PRS-8B060

100 V

1

8

7

6

5

4

3

2

1

70 V

figure 10.7: Top view of the basic amplifier output boards

Bosch Security Systems 2011-02