Bosch PRM-4P600 - Connections; Audio Inputs

Power amplifier Installation | en 21
Bosch Security Systems B.V.
Installation manual
2023-01 | V02 | F.01U.402.247
5.2 Connections
– Audio inputs, page 21
– AMP-LINK, page 23
– Power outputs, page 24
– Ready/Fault relay, page 25
– Remote on, page 26
– Mains power, page 26
5.2.1 Audio inputs
Audio input connectors are either Euroblock type for 2‑channels per connector, or 4‑channels
via the AMP‑LINK RJ45 connector.
Euroblock inputs
Euroblock inputs are electronically balanced. Whenever possible, using balanced audio signal
feeds at the input of the power amplifier is always preferred. Unbalanced connections should
only be used if the cables are very short and no interfering signals are to be expected in the
vicinity of the power amplifier. In this case, bridging the screen (shielding) and the pin of the
inverting input inside of the connector is mandatory. Otherwise, a 6dB drop in level, hum and
hiss noise could result. Due to their immunity against external interference sources, such as
dimmers, mains connections, HF-control lines, etc., using balanced cabling and connections is
always preferable.
i
Notice!
Euroblock input connectors must be inverted when inserting the connector to the device
(screws downwards).