Bosch PRM-4P600 - Set the Input Routing (DUAL; PARALLEL; IN1 to ALL)

18 en | Installation Power amplifier
2023-01 | V02 | F.01U.402.247
Installation manual
Bosch Security Systems B.V.
5.1.2 Set the input routing (DUAL / PARALLEL / IN1 to ALL)
DUAL and PARALLEL modes are selected for channels 1‑2 and separately for channels 3‑4,
using the DIP switch in the Up position for “DUAL” mode or the Down position for
“PARALLEL” mode. IN1 to ALL affects all channels. If IN1 to ALL is active, it overrides the
setting of DUAL/PARALLEL switch.
APD
AMP MODE
CH 1 CH 2
CH 1
CH 2
OFF
ON
100 V
4 Ω
8 Ω
70 V
LP
FLAT
HP 1
HP 2
DUAL PARALLEL CH
1/2
SPEAKER EQ
CH3
CH4
CH3
CH4
100 V
4 Ω
8 Ω
70 V
LP
FLAT
HP 1
HP 2
IN1 to ALL
OFF
ON
DUAL PARALLEL CH
3/4
AMP MODE SPEAKER EQ
DUAL mode
In DUAL mode, the two adjacent channels controlled via the DIP‑switch are completely
independent from each other. Using the input level controls on the power amp’s rear panel
allows independently adjusting the channels’ amplification.
PARALLEL mode
In PARALLEL mode, the inputs of the channels CH1‑2 and/or CH3‑4 are directly linked. The
audio signal has to be applied to the input connectors of either CH1 resp. CH3. Input level
control for CH1 controls CH1 and CH2 at the same time. Respectively level control CH3 affects
CH3 and CH4..
IN1 to ALL
IN1 to ALL allows the use of input 1 to be sent to all amplifier channels. IN1 to ALL is
configured as either ON or OFF using the IN1 to ALL DIP switch at the rear of the device.
Level control CH1 affects the volume of all 4 output channels at the same time.
Refer to
– Indicators, controls and settings, page 16