Cabling with Speakon-type connector in Bridged mode
In Bridged mode both amp channels work in push-pull operation to provide doubled output
voltage.
In bridged mode operation speaker connection has to be established using pins 1+ and 2- of
the Speakon socket CHANNEL A. The correct connection is also indicated at the amplifiers
rear panel.
Figure 6.3: Bridged mode
Speakon CHANNEL A
Connector 1+ 2-
Signal Bridged+ Bridged-
Table 6.3: Speaker connection using Speakon A
Caution!
In Bridged mode operation, it is not allowable for the load connected to all below a value of 4
ohms. Extremely high voltages can be present at the output. The connected speaker systems
must be able to handle such voltages. Make sure to completely read and fully observe power
rating specifications of the speaker systems to be used and to check them against the output
power capacity of the power amp.
Property damage and/or personal injury may occur.
C Series amplifier
Cabling with Euroblock-type connector in Normal mode
See illustration for connecting speakers in Normal mode. The correct connection is also
indicated at the amplifiers rear panel.
Figure 6.4: Normal mode
Cabling with Speakon-type connector in Bridged mode
In Bridged mode both amp channels work in push-pull operation to provide doubled output
voltage.
6.9.2
L Series and C Series FIR-Drive Power
Amplifiers
Controls, indicators and connections | en 21
Bosch Sicherheitssysteme GmbH Installation manual 2017.10 | 02 | F.01U.327.801
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