Bosch PLENA matrix - Amplifier Bridging Configuration

Amplifier Bridging Configuration
1. Set the Bridge DIP switch (13 and 14) on the rear of the unit to the ON position (1+2 or
3+4).
2. Restart the amplifier, as the value of the DIP switches is only read during powering up.
3. Wiring the outputs; The two channels being bridged together should have the commons
(0V) connected together, and then either the 4/8/70V/100V taps off the two channels are
then used for the + ve and the – ve to the speaker cable.
!
Warning!
Bridging the 70V and 100V lines, the voltage will be 140V and 200V respectively.
!
Caution!
Be sure that the higher voltage does not create a problem for the speakers used:
If any problem exists, this may be solved with the use of a 2:1 step down transformer
7.5.1
PLENA matrix Configuration | en 31
Bosch Security Systems B.V. Operation manual 2013-06 | V1.0 |