Multi Channel DSP Amplifier
The multi channel amplifier’s DSP is able to be used to process audio signals for up to 4
zones. The amplifiers can be used either with or without the DSP functionality.
The amplifier can be used standalone or connected to the DSP matrix mixer.
Refer to DSP Matrix Mixer, page 21 if the amplifier is only connected to the DSP matrix mixer
and loudspeaker output zones.
CH CH CH CH
Signal/Clip
Fault

1 2

Number Item Description
1 Power on LED Flashes (green) during power up. It becomes solid (green) as soon the amplifier is
ready-for-use.
2 Input signal
LEDs
– Two LEDs per amplifier input channel (4x) indicating:
– Protect/fault. On (red), indicates an amplifier fault. Refer to Troubleshooting,
page 41 section.
– Signal presence/clip bi-color LED: On, when the applied audio input signal is
-40dB from clip (green), -3dB from clip (amber), 0dB full output power
(red).
Standalone without connection to the PC GUI
After following the guide on setting up the input sensitivity and bridging (if required).
1. Turn on the amplifier.
2. Use level controls on the rear of the unit to set desired output level (The factory preset
configuration is input 1 is routed to output 1 etc. All internal levels are set to unity gain).
3. If usage with the auto standby mode is required, the preset time out is 1 hour.
With DSP / PC GUI functionality
After following the guide on setting the input sensitivity and bridging (if required).
1. Turn on the amplifier.
2. Use level controls on the rear of the unit, to set desired output level:
– Usually these level controls are set to full, as you can adjust the levels down within
the PC GUI.
3. Open the PC GUI program and click on "Device" in the menu bar, and then click
"Connect":
– Refer to Multi Channel DSP Amplifier PC GUI, page 28 for configuration details.
4. If required, more information on using the PC GUI can be found in the help menu.
– Refer to Multi Channel DSP Amplifier PC GUI, page 28; for DSP features.
Notice!
Hardware settings (controls and switches) cannot be overruled or changed by the DSP matrix
mixer and amplifier PC GUI configuration software.
8.4
PLENA matrix Operation | en 37
Bosch Security Systems B.V. Operation manual 2013-06 | V1.0 |