Bosch Security Systems | 2008-02 | PLE-1P120-US, PLE-1P240-US en
Plena Power Amplifier
| Installation and User Instructions | Connections and settings
en
| 17
4.2 Connecting
speakers
Connect speakers to the 25 V, the 70 V or the 4 Ohm
terminals on the Euro style pluggable screw terminal
connector (5) at the rear of the unit.
4.2.1
Constant voltage loudspeakers
The power amplifier can drive 25 V and 70 V constant
voltage loudspeakers. The 70 V connection in shown in
figure 4.3.
Connect the loudspeakers in parallel and check the
loudspeaker polarity for in-phase connection. The
summed loudspeaker power should not exceed the
rated amplifier output power.
4.2.2
Low impedance loudspeakers
Connect low impedance loudspeakers to the 4 Ohm/0
terminals. This output can deliver the rated output
power into an 4 Ohm load. Connect multiple
loudspeakers in a series/parallel-arrangement to make
the combined impedance 4 Ohm or higher. Check the
loudspeaker polarity for in-phase connection.
figure 4.3: Connecting speakers
figure 4.4: Connecting speakers
