PRAESENSA
Installation wiring | en
39
Bosch Security Systems B.V.
Underwriters Laboratories Listing Document (ULLD)
2021.12.21 | V0.15b | F.01U.402.882
3.4.7
Amplifier outputs
The amplifier provides four output channels and a spare channel that substitutes a failing
channel.
The channels have direct drive 70/100 V outputs for low distortion, low crosstalk and a wide
audio bandwidth. There are no output transformers that would be a limiting factor for the
output power of each channel. Every channel also has a load independent flat frequency
response. This combination of features makes it possible to partition the available amplifier
power across all channels and utilize that power effectively.
Every channel has a 6‑pole connector socket, providing independently switched loudspeaker
group A and group B outputs and a separate connection facility for an End‑of‑Line device for
loudspeaker cable supervision. The two outputs can be used for single Class A, single Class B
or dual Class B field wiring.
!
Caution!
Amplifier outputs may carry output voltages up to 100 VRMS. Touching uninsulated terminals
or wiring may result in an unpleasant sensation.
i
Notice!
UL notifications
For proper supervision, do not loop wire under terminals. Break the wire run to provide
supervision of connections.
